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JNA API 4.5.2
com.sun.jna

Class Pointer

  • Direct Known Subclasses:
    Function, Memory


    public class Pointer
    extends java.lang.Object
    An abstraction for a native pointer data type. A Pointer instance represents, on the Java side, a native pointer. The native pointer could be any type of native pointer. Methods such as write, read, getXXX, and setXXX, provide means to access memory underlying the native pointer.

    While a constructor exists to create a Pointer from an integer value, it's not generally a good idea to be creating pointers that way.

    Author:
    Sheng Liang, originator, Todd Fast, suitability modifications, Timothy Wall, robust library loading
    See Also:
    Function
    • Field Summary

      Fields 
      Modifier and Type Field and Description
      static Pointer NULL
      Convenience constant, same as null.
      protected long peer
      Pointer value of the real native pointer.
      static int SIZE
      Size of a native pointer, in bytes.
    • Constructor Summary

      Constructors 
      Constructor and Description
      Pointer()
      Derived class must assign peer pointer value.
      Pointer(long peer)
      Create from native pointer.
    • Method Summary

      All Methods Static Methods Instance Methods Concrete Methods Deprecated Methods 
      Modifier and Type Method and Description
      void clear(long size)
      Zero memory for the given number of bytes.
      static Pointer createConstant(int peer)
      Convenience constant, equivalent to (void*)CONSTANT.
      static Pointer createConstant(long peer)
      Convenience constant, equivalent to (void*)CONSTANT.
      java.lang.String dump(long offset, int size)
      Dump memory for debugging purposes.
      boolean equals(java.lang.Object o) 
      byte getByte(long offset)
      Indirect the native pointer as a pointer to byte.
      byte[] getByteArray(long offset, int arraySize)
      Read a native array of bytes of size arraySize from the given offset from this Pointer.
      java.nio.ByteBuffer getByteBuffer(long offset, long length)
      Get a ByteBuffer mapped to the memory pointed to by the pointer, ensuring the buffer uses native byte order.
      char getChar(long offset)
      Indirect the native pointer as a pointer to wchar_t.
      char[] getCharArray(long offset, int arraySize)
      Read a native array of wchar_t of size arraySize from the given offset from this Pointer.
      double getDouble(long offset)
      Indirect the native pointer as a pointer to double.
      double[] getDoubleArray(long offset, int arraySize)
      Read a native array of double of size arraySize from the given offset from this Pointer.
      float getFloat(long offset)
      Indirect the native pointer as a pointer to float.
      float[] getFloatArray(long offset, int arraySize)
      Read a native array of float of size arraySize from the given offset from this Pointer.
      int getInt(long offset)
      Indirect the native pointer as a pointer to int.
      int[] getIntArray(long offset, int arraySize)
      Read a native array of int32 of size arraySize from the given offset from this Pointer.
      long getLong(long offset)
      Indirect the native pointer as a pointer to long.
      long[] getLongArray(long offset, int arraySize)
      Read a native array of int64 of size arraySize from the given offset from this Pointer.
      NativeLong getNativeLong(long offset)
      Indirect the native pointer as a pointer to long.
      Pointer getPointer(long offset)
      Indirect the native pointer as a pointer to pointer.
      Pointer[] getPointerArray(long offset)
      Returns an array of Pointer.
      Pointer[] getPointerArray(long offset, int arraySize)
      Returns an array of Pointer of the requested size.
      short getShort(long offset)
      Indirect the native pointer as a pointer to short.
      short[] getShortArray(long offset, int arraySize)
      Read a native array of int16 of size arraySize from the given offset from this Pointer.
      java.lang.String getString(long offset)
      Copy native memory to a Java String.
      java.lang.String getString(long offset, boolean wide)
      Deprecated. 
      java.lang.String getString(long offset, java.lang.String encoding)
      Copy native memory to a Java String using the requested encoding.
      java.lang.String[] getStringArray(long offset)
      Returns an array of String based on a native array of char *.
      java.lang.String[] getStringArray(long offset, boolean wide)
      java.lang.String[] getStringArray(long offset, int length)
      Returns an array of String based on a native array of char *, using the given array length.
      java.lang.String[] getStringArray(long offset, int length, boolean wide)
      java.lang.String[] getStringArray(long offset, int length, java.lang.String encoding)
      Returns an array of String based on a native array of char* or wchar_t* based on the wide parameter, using the given array length.
      java.lang.String[] getStringArray(long offset, java.lang.String encoding)
      Returns an array of String based on a native array of char *, using the requested encoding.
      (package private) java.lang.Object getValue(long offset, java.lang.Class<?> type, java.lang.Object currentValue) 
      java.lang.String getWideString(long offset)
      Read a wide (const wchar_t *) string from memory.
      java.lang.String[] getWideStringArray(long offset) 
      java.lang.String[] getWideStringArray(long offset, int length) 
      int hashCode() 
      long indexOf(long offset, byte value)
      Returns the offset of the given value in memory from the given offset, or -1 if the value is not found.
      static long nativeValue(Pointer p)
      Read the native peer value.
      static void nativeValue(Pointer p, long value)
      Set the native peer value.
      void read(long offset, byte[] buf, int index, int length)
      Indirect the native pointer, copying from memory pointed to by native pointer, into the specified array.
      void read(long offset, char[] buf, int index, int length)
      Indirect the native pointer, copying from memory pointed to by native pointer, into the specified array.
      void read(long offset, double[] buf, int index, int length)
      Indirect the native pointer, copying from memory pointed to by native pointer, into the specified array.
      void read(long offset, float[] buf, int index, int length)
      Indirect the native pointer, copying from memory pointed to by native pointer, into the specified array.
      void read(long offset, int[] buf, int index, int length)
      Indirect the native pointer, copying from memory pointed to by native pointer, into the specified array.
      void read(long offset, long[] buf, int index, int length)
      Indirect the native pointer, copying from memory pointed to by native pointer, into the specified array.
      void read(long offset, Pointer[] buf, int index, int length)
      Indirect the native pointer, copying from memory pointed to by native pointer, into the specified array.
      void read(long offset, short[] buf, int index, int length)
      Indirect the native pointer, copying from memory pointed to by native pointer, into the specified array.
      void setByte(long offset, byte value)
      Set value at location being pointed to.
      void setChar(long offset, char value)
      Set value at location being pointed to.
      void setDouble(long offset, double value)
      Set value at location being pointed to.
      void setFloat(long offset, float value)
      Set value at location being pointed to.
      void setInt(long offset, int value)
      Set value at location being pointed to.
      void setLong(long offset, long value)
      Set value at location being pointed to.
      void setMemory(long offset, long length, byte value)
      Write value to the requested bank of memory.
      void setNativeLong(long offset, NativeLong value)
      Set value at location being pointed to.
      void setPointer(long offset, Pointer value)
      Set value at location being pointed to.
      void setShort(long offset, short value)
      Set value at location being pointed to.
      void setString(long offset, java.lang.String value)
      Copy bytes out of string value to the location being pointed to, using the encoding indicated by Native.getDefaultStringEncoding().
      void setString(long offset, java.lang.String value, boolean wide)
      Deprecated. 
      void setString(long offset, java.lang.String value, java.lang.String encoding)
      Copy string value to the location being pointed to, using the requested encoding.
      void setString(long offset, WString value)
      Copy string value to the location being pointed to as a wide string (wchar_t*).
      (package private) void setValue(long offset, java.lang.Object value, java.lang.Class<?> type) 
      void setWideString(long offset, java.lang.String value)
      Copy string value to the location being pointed to as a wide string (wchar_t*).
      Pointer share(long offset)
      Provide a view of this memory using the given offset to calculate a new base address.
      Pointer share(long offset, long sz)
      Provide a view of this memory using the given offset to calculate a new base address, bounds-limiting the memory with the given size.
      java.lang.String toString() 
      void write(long offset, byte[] buf, int index, int length)
      Indirect the native pointer, copying into memory pointed to by native pointer, from the specified array.
      void write(long offset, char[] buf, int index, int length)
      Indirect the native pointer, copying into memory pointed to by native pointer, from the specified array.
      void write(long offset, double[] buf, int index, int length)
      Indirect the native pointer, copying into memory pointed to by native pointer, from the specified array.
      void write(long offset, float[] buf, int index, int length)
      Indirect the native pointer, copying into memory pointed to by native pointer, from the specified array.
      void write(long offset, int[] buf, int index, int length)
      Indirect the native pointer, copying into memory pointed to by native pointer, from the specified array.
      void write(long offset, long[] buf, int index, int length)
      Indirect the native pointer, copying into memory pointed to by native pointer, from the specified array.
      void write(long bOff, Pointer[] buf, int index, int length)
      Write the given array of Pointer to native memory.
      void write(long offset, short[] buf, int index, int length)
      Indirect the native pointer, copying into memory pointed to by native pointer, from the specified array.
      • Methods inherited from class java.lang.Object

        clone, finalize, getClass, notify, notifyAll, wait, wait, wait
    • Field Detail

      • SIZE

        public static final int SIZE
        Size of a native pointer, in bytes.
      • NULL

        public static final Pointer NULL
        Convenience constant, same as null.
      • peer

        protected long peer
        Pointer value of the real native pointer. Use long to be 64-bit safe.
    • Constructor Detail

      • Pointer

        Pointer()
        Derived class must assign peer pointer value.
      • Pointer

        public Pointer(long peer)
        Create from native pointer. Don't use this unless you know what you're doing.
    • Method Detail

      • createConstant

        public static final Pointer createConstant(long peer)
        Convenience constant, equivalent to (void*)CONSTANT.
      • createConstant

        public static final Pointer createConstant(int peer)
        Convenience constant, equivalent to (void*)CONSTANT. This version will avoid setting any of the high bits on 64-bit systems.
      • share

        public Pointer share(long offset)
        Provide a view of this memory using the given offset to calculate a new base address.
      • share

        public Pointer share(long offset,
                             long sz)
        Provide a view of this memory using the given offset to calculate a new base address, bounds-limiting the memory with the given size.
      • clear

        public void clear(long size)
        Zero memory for the given number of bytes.
      • equals

        public boolean equals(java.lang.Object o)
        Overrides:
        equals in class java.lang.Object
      • hashCode

        public int hashCode()
        Overrides:
        hashCode in class java.lang.Object
      • indexOf

        public long indexOf(long offset,
                            byte value)
        Returns the offset of the given value in memory from the given offset, or -1 if the value is not found.
      • read

        public void read(long offset,
                         byte[] buf,
                         int index,
                         int length)
        Indirect the native pointer, copying from memory pointed to by native pointer, into the specified array.
        Parameters:
        offset - byte offset from pointer into which data is copied
        buf - byte array into which data is copied
        index - array index from which to start copying
        length - number of elements from native pointer that must be copied
      • read

        public void read(long offset,
                         short[] buf,
                         int index,
                         int length)
        Indirect the native pointer, copying from memory pointed to by native pointer, into the specified array.
        Parameters:
        offset - byte offset from pointer from which data is copied
        buf - short array into which data is copied
        index - array index to which data is copied
        length - number of elements from native pointer that must be copied
      • read

        public void read(long offset,
                         char[] buf,
                         int index,
                         int length)
        Indirect the native pointer, copying from memory pointed to by native pointer, into the specified array.
        Parameters:
        offset - byte offset from pointer from which data is copied
        buf - char array into which data is copied
        index - array index to which data is copied
        length - number of elements from native pointer that must be copied
      • read

        public void read(long offset,
                         int[] buf,
                         int index,
                         int length)
        Indirect the native pointer, copying from memory pointed to by native pointer, into the specified array.
        Parameters:
        offset - byte offset from pointer from which data is copied
        buf - int array into which data is copied
        index - array index to which data is copied
        length - number of elements from native pointer that must be copied
      • read

        public void read(long offset,
                         long[] buf,
                         int index,
                         int length)
        Indirect the native pointer, copying from memory pointed to by native pointer, into the specified array.
        Parameters:
        offset - byte offset from pointer from which data is copied
        buf - long array into which data is copied
        index - array index to which data is copied
        length - number of elements from native pointer that must be copied
      • read

        public void read(long offset,
                         float[] buf,
                         int index,
                         int length)
        Indirect the native pointer, copying from memory pointed to by native pointer, into the specified array.
        Parameters:
        offset - byte offset from pointer from which data is copied
        buf - float array into which data is copied
        index - array index to which data is copied
        length - number of elements from native pointer that must be copied
      • read

        public void read(long offset,
                         double[] buf,
                         int index,
                         int length)
        Indirect the native pointer, copying from memory pointed to by native pointer, into the specified array.
        Parameters:
        offset - byte offset from pointer from which data is copied
        buf - double array into which data is copied
        index - array index to which data is copied
        length - number of elements from native pointer that must be copied
      • read

        public void read(long offset,
                         Pointer[] buf,
                         int index,
                         int length)
        Indirect the native pointer, copying from memory pointed to by native pointer, into the specified array.
        Parameters:
        offset - byte offset from pointer from which data is copied
        buf - Pointer array into which data is copied
        index - array index to which data is copied
        length - number of elements from native pointer that must be copied
      • write

        public void write(long offset,
                          byte[] buf,
                          int index,
                          int length)
        Indirect the native pointer, copying into memory pointed to by native pointer, from the specified array.
        Parameters:
        offset - byte offset from pointer into which data is copied
        buf - byte array from which to copy
        index - array index from which to start copying
        length - number of elements from buf that must be copied
      • write

        public void write(long offset,
                          short[] buf,
                          int index,
                          int length)
        Indirect the native pointer, copying into memory pointed to by native pointer, from the specified array.
        Parameters:
        offset - byte offset from pointer into which data is copied
        buf - short array from which to copy
        index - array index from which to start copying
        length - number of elements from buf that must be copied
      • write

        public void write(long offset,
                          char[] buf,
                          int index,
                          int length)
        Indirect the native pointer, copying into memory pointed to by native pointer, from the specified array.
        Parameters:
        offset - byte offset from pointer into which data is copied
        buf - char array from which to copy
        index - array index from which to start copying
        length - number of elements from buf that must be copied
      • write

        public void write(long offset,
                          int[] buf,
                          int index,
                          int length)
        Indirect the native pointer, copying into memory pointed to by native pointer, from the specified array.
        Parameters:
        offset - byte offset from pointer into which data is copied
        buf - int array from which to copy
        index - array index from which to start copying
        length - number of elements from buf that must be copied
      • write

        public void write(long offset,
                          long[] buf,
                          int index,
                          int length)
        Indirect the native pointer, copying into memory pointed to by native pointer, from the specified array.
        Parameters:
        offset - byte offset from pointer into which data is copied
        buf - long array from which to copy
        index - array index from which to start copying
        length - number of elements from buf that must be copied
      • write

        public void write(long offset,
                          float[] buf,
                          int index,
                          int length)
        Indirect the native pointer, copying into memory pointed to by native pointer, from the specified array.
        Parameters:
        offset - byte offset from pointer into which data is copied
        buf - float array from which to copy
        index - array index from which to start copying
        length - number of elements from buf that must be copied
      • write

        public void write(long offset,
                          double[] buf,
                          int index,
                          int length)
        Indirect the native pointer, copying into memory pointed to by native pointer, from the specified array.
        Parameters:
        offset - byte offset from pointer into which data is copied
        buf - double array from which to copy
        index - array index from which to start copying
        length - number of elements from buf that must be copied
      • write

        public void write(long bOff,
                          Pointer[] buf,
                          int index,
                          int length)
        Write the given array of Pointer to native memory.
        Parameters:
        bOff - byte offset from pointer into which data is copied
        buf - Pointer array from which to copy
        index - array index from which to start copying
        length - number of elements from buf that must be copied
      • getValue

        java.lang.Object getValue(long offset,
                                  java.lang.Class<?> type,
                                  java.lang.Object currentValue)
      • getByte

        public byte getByte(long offset)
        Indirect the native pointer as a pointer to byte. This is equivalent to the expression *((jbyte *)((char *)Pointer + offset)).
        Parameters:
        offset - offset from pointer to perform the indirection
        Returns:
        the byte value being pointed to
      • getChar

        public char getChar(long offset)
        Indirect the native pointer as a pointer to wchar_t. This is equivalent to the expression *((wchar_t*)((char *)Pointer + offset)).
        Parameters:
        offset - offset from pointer to perform the indirection
        Returns:
        the wchar_t value being pointed to
      • getShort

        public short getShort(long offset)
        Indirect the native pointer as a pointer to short. This is equivalent to the expression *((jshort *)((char *)Pointer + offset)).
        Parameters:
        offset - byte offset from pointer to perform the indirection
        Returns:
        the short value being pointed to
      • getInt

        public int getInt(long offset)
        Indirect the native pointer as a pointer to int. This is equivalent to the expression *((jint *)((char *)Pointer + offset)).
        Parameters:
        offset - byte offset from pointer to perform the indirection
        Returns:
        the int value being pointed to
      • getLong

        public long getLong(long offset)
        Indirect the native pointer as a pointer to long. This is equivalent to the expression *((jlong *)((char *)Pointer + offset)).
        Parameters:
        offset - byte offset from pointer to perform the indirection
        Returns:
        the long value being pointed to
      • getNativeLong

        public NativeLong getNativeLong(long offset)
        Indirect the native pointer as a pointer to long. This is equivalent to the expression *((long *)((char *)Pointer + offset)).
        Parameters:
        offset - byte offset from pointer to perform the indirection
        Returns:
        the long value being pointed to
      • getFloat

        public float getFloat(long offset)
        Indirect the native pointer as a pointer to float. This is equivalent to the expression *((jfloat *)((char *)Pointer + offset)).
        Parameters:
        offset - byte offset from pointer to perform the indirection
        Returns:
        the float value being pointed to
      • getDouble

        public double getDouble(long offset)
        Indirect the native pointer as a pointer to double. This is equivalent to the expression *((jdouble *)((char *)Pointer + offset)).
        Parameters:
        offset - byte offset from pointer to perform the indirection
        Returns:
        the double value being pointed to
      • getPointer

        public Pointer getPointer(long offset)
        Indirect the native pointer as a pointer to pointer. This is equivalent to the expression *((void **)((char *)Pointer + offset)).
        Parameters:
        offset - byte offset from pointer to perform the indirection
        Returns:
        a Pointer equivalent of the pointer value being pointed to, or null if the pointer value is NULL;
      • getByteBuffer

        public java.nio.ByteBuffer getByteBuffer(long offset,
                                                 long length)
        Get a ByteBuffer mapped to the memory pointed to by the pointer, ensuring the buffer uses native byte order.
        Parameters:
        offset - byte offset from pointer to start the buffer
        length - Length of ByteBuffer
        Returns:
        a direct ByteBuffer that accesses the memory being pointed to,
      • getString

        @Deprecated
        public java.lang.String getString(long offset,
                                                      boolean wide)
        Deprecated. use getString(long,String) or getWideString(long) instead.
        Copy native memory to a Java String. If wide is true, access the memory as an array of wchar_t, otherwise as an array of char, using the default platform encoding.
        Parameters:
        offset - byte offset from pointer to obtain the native string v * @param wide whether to convert from a wide or standard C string
        Returns:
        the String value being pointed to
      • getWideString

        public java.lang.String getWideString(long offset)
        Read a wide (const wchar_t *) string from memory.
      • getString

        public java.lang.String getString(long offset)
        Copy native memory to a Java String. The encoding used is obtained form Native.getDefaultStringEncoding().
        Parameters:
        offset - byte offset from pointer to start reading bytes
        Returns:
        the String value being pointed to
      • getString

        public java.lang.String getString(long offset,
                                          java.lang.String encoding)
        Copy native memory to a Java String using the requested encoding.
        Parameters:
        offset - byte offset from pointer to obtain the native string
        encoding - the desired encoding
        Returns:
        the String value being pointed to
      • getByteArray

        public byte[] getByteArray(long offset,
                                   int arraySize)
        Read a native array of bytes of size arraySize from the given offset from this Pointer.
      • getCharArray

        public char[] getCharArray(long offset,
                                   int arraySize)
        Read a native array of wchar_t of size arraySize from the given offset from this Pointer.
      • getShortArray

        public short[] getShortArray(long offset,
                                     int arraySize)
        Read a native array of int16 of size arraySize from the given offset from this Pointer.
      • getIntArray

        public int[] getIntArray(long offset,
                                 int arraySize)
        Read a native array of int32 of size arraySize from the given offset from this Pointer.
      • getLongArray

        public long[] getLongArray(long offset,
                                   int arraySize)
        Read a native array of int64 of size arraySize from the given offset from this Pointer.
      • getFloatArray

        public float[] getFloatArray(long offset,
                                     int arraySize)
        Read a native array of float of size arraySize from the given offset from this Pointer.
      • getDoubleArray

        public double[] getDoubleArray(long offset,
                                       int arraySize)
        Read a native array of double of size arraySize from the given offset from this Pointer.
      • getPointerArray

        public Pointer[] getPointerArray(long offset)
        Returns an array of Pointer. The array length is determined by a NULL-valued terminating element.
      • getPointerArray

        public Pointer[] getPointerArray(long offset,
                                         int arraySize)
        Returns an array of Pointer of the requested size.
      • getStringArray

        public java.lang.String[] getStringArray(long offset)

        Returns an array of String based on a native array of char *. The array length is determined by a NULL-valued terminating element.

        The strings are decoded using the encoding returned by Native.getDefaultStringEncoding().
      • getStringArray

        public java.lang.String[] getStringArray(long offset,
                                                 java.lang.String encoding)
        Returns an array of String based on a native array of char *, using the requested encoding. The array length is determined by a NULL-valued terminating element.
      • getStringArray

        public java.lang.String[] getStringArray(long offset,
                                                 int length)

        Returns an array of String based on a native array of char *, using the given array length.

        The strings are decoded using the encoding returned by Native.getDefaultStringEncoding().
      • getStringArray

        @Deprecated
        public java.lang.String[] getStringArray(long offset,
                                                             boolean wide)
        Returns an array of String based on a native array of char* or wchar_t* based on the wide parameter. The array length is determined by a NULL-valued terminating element.
      • getWideStringArray

        public java.lang.String[] getWideStringArray(long offset)
      • getWideStringArray

        public java.lang.String[] getWideStringArray(long offset,
                                                     int length)
      • getStringArray

        @Deprecated
        public java.lang.String[] getStringArray(long offset,
                                                             int length,
                                                             boolean wide)
        Returns an array of String based on a native array of char* or wchar_t* based on the wide parameter, using the given array length.
      • getStringArray

        public java.lang.String[] getStringArray(long offset,
                                                 int length,
                                                 java.lang.String encoding)
        Returns an array of String based on a native array of char* or wchar_t* based on the wide parameter, using the given array length.
        Parameters:
        offset -
        length -
        encoding -
      • setValue

        void setValue(long offset,
                      java.lang.Object value,
                      java.lang.Class<?> type)
      • setMemory

        public void setMemory(long offset,
                              long length,
                              byte value)
        Write value to the requested bank of memory.
        Parameters:
        offset - byte offset from pointer to start
        length - number of bytes to write
        value - value to be written
      • setByte

        public void setByte(long offset,
                            byte value)
        Set value at location being pointed to. This is equivalent to the expression *((jbyte *)((char *)Pointer + offset)) = value.
        Parameters:
        offset - byte offset from pointer at which value must be set
        value - byte value to set
      • setShort

        public void setShort(long offset,
                             short value)
        Set value at location being pointed to. This is equivalent to the expression *((jshort *)((char *)Pointer + offset)) = value.
        Parameters:
        offset - byte offset from pointer at which value must be set
        value - short value to set
      • setChar

        public void setChar(long offset,
                            char value)
        Set value at location being pointed to. This is equivalent to the expression *((wchar_t *)((char *)Pointer + offset)) = value.
        Parameters:
        offset - byte offset from pointer at which value must be set
        value - char value to set
      • setInt

        public void setInt(long offset,
                           int value)
        Set value at location being pointed to. This is equivalent to the expression *((jint *)((char *)Pointer + offset)) = value.
        Parameters:
        offset - byte offset from pointer at which value must be set
        value - int value to set
      • setLong

        public void setLong(long offset,
                            long value)
        Set value at location being pointed to. This is equivalent to the expression *((jlong *)((char *)Pointer + offset)) = value.
        Parameters:
        offset - byte offset from pointer at which value must be set
        value - long value to set
      • setNativeLong

        public void setNativeLong(long offset,
                                  NativeLong value)
        Set value at location being pointed to. This is equivalent to the expression *((long *)((char *)Pointer + offset)) = value.
        Parameters:
        offset - byte offset from pointer at which value must be set
        value - long value to set
      • setFloat

        public void setFloat(long offset,
                             float value)
        Set value at location being pointed to. This is equivalent to the expression *((jfloat *)((char *)Pointer + offset)) = value.
        Parameters:
        offset - byte offset from pointer at which value must be set
        value - float value to set
      • setDouble

        public void setDouble(long offset,
                              double value)
        Set value at location being pointed to. This is equivalent to the expression *((jdouble *)((char *)Pointer + offset)) = value.
        Parameters:
        offset - byte offset from pointer at which value must be set
        value - double value to set
      • setPointer

        public void setPointer(long offset,
                               Pointer value)
        Set value at location being pointed to. This is equivalent to the expression *((void **)((char *)Pointer + offset)) = value.
        Parameters:
        offset - byte offset from pointer at which value must be set
        value - Pointer holding the actual pointer value to set, which may be null to indicate a NULL pointer.
      • setString

        @Deprecated
        public void setString(long offset,
                                          java.lang.String value,
                                          boolean wide)
        Deprecated. use setWideString(long,String) instead.
        Copy string value to the location being pointed to.
        Parameters:
        offset - byte offset from pointer at which characters in value must be set
        value - java.lang.String value to set
        wide - whether to write the native string as an array of wchar_t. If false, writes as a NUL-terminated array of char using the encoding indicated by Native.getDefaultStringEncoding().
      • setWideString

        public void setWideString(long offset,
                                  java.lang.String value)
        Copy string value to the location being pointed to as a wide string (wchar_t*).
        Parameters:
        offset - byte offset from pointer at which characters in value must be set
        value - java.lang.String value to set
      • setString

        public void setString(long offset,
                              WString value)
        Copy string value to the location being pointed to as a wide string (wchar_t*).
        Parameters:
        offset - byte offset from pointer at which characters in value must be set
        value - WString value to set
      • setString

        public void setString(long offset,
                              java.lang.String value)
        Copy bytes out of string value to the location being pointed to, using the encoding indicated by Native.getDefaultStringEncoding().
        Parameters:
        offset - byte offset from pointer at which characters in value must be set
        value - java.lang.String value to set
      • setString

        public void setString(long offset,
                              java.lang.String value,
                              java.lang.String encoding)
        Copy string value to the location being pointed to, using the requested encoding.
        Parameters:
        offset - byte offset from pointer at which characters in value must be set
        value - java.lang.String value to set
        encoding - desired encoding
      • dump

        public java.lang.String dump(long offset,
                                     int size)
        Dump memory for debugging purposes.
      • toString

        public java.lang.String toString()
        Overrides:
        toString in class java.lang.Object
      • nativeValue

        public static long nativeValue(Pointer p)
        Read the native peer value. Use with caution.
      • nativeValue

        public static void nativeValue(Pointer p,
                                       long value)
        Set the native peer value. Use with caution.
JNA API 4.5.2

Copyright © 2007-2017 Timothy Wall. All Rights Reserved.