DoubleBuffer duplicate() method in Java with Examples

The java.nio.DoubleBuffer has a duplicate() method. The DoubleBuffer Class is used to create a new float buffer that shares the contents of the given buffer. The buffer's contents will be making up the new buffer. The new buffer will reflect changes made to this buffer's content and vice versa; the position, limit, and mark values of the two buffers will remain separate.

The capacity, limit, position, and mark values of the new buffer will be the same as those of the current buffer. The new buffer will be read-only if and only if this buffer is read-only, and it will be direct if and only if this buffer is direct.

Syntax:

Return Value: The previous double buffer's contents are carried in the new double buffer that is returned by this method.

Example 1:

The code creates and generates a DoubleBuffer called doublebuff1 with a capacity of 10. Doublebuff2, a new DoubleBuffer instance that is a duplicate of doublebuff1, is made using the duplicate() method. The position, limit, and mark parameters of this duplicate buffer are identical to those of the original buffer, and it uses the same backing array. Changes to a buffer's position or limit, however, do not affect another. Additionally, the contents of the duplicate buffer are shown, demonstrating that it reflects the same underlying data as the original buffer.

Implementation:

FileName: BufferDuplicateExample1.java

Output:

 The Original DoubleBuffer is given by: [9.359999656677246, 0.0, 0.0, 0.0, 7.230000019073486, 0.0, 0.0, 0.0, 0.0, 0.0] The Duplicate DoubleBuffer is given by: [9.359999656677246, 0.0, 0.0, 0.0, 7.230000019073486, 0.0, 0.0, 0.0, 0.0, 0.0] 

Example 2:

The code creates and generates a DoubleBuffer called doublebuff1, then rewinds it. AsReadOnlyBuffer() creates a read-only view of this buffer that enables reading but restricts modification. The read-only buffer's contents are printed. After that, the buffer is returned, and duplicate() is used to make a copy of this read-only buffer. Although this duplicate represents the read-only buffer's current state, it shares the same underlying data. To show that it offers a view of the identical data, the contents of the duplicate buffer are printed. Read-only buffer access exceptions and exceptions relating to invalid operations are handled by the code.

Implementation:

FileName: BufferDuplicateExample2.java

Output:

 The read-only DoubleBuffer is given by: 9.359999656677246, 0.0, 0.0, 0.0, 7.230000019073486, 0.0, 0.0, 0.0, 0.0, 0.0, The duplicate copy of read-only DoubleBuffer is given by : 9.359999656677246, 0.0, 0.0, 0.0, 7.230000019073486, 0.0, 0.0, 0.0, 0.0, 0.0,