IntBuffer duplicate() method in Java

A duplicate buffer of a buffer can be created using the method duplicate() in the class java.nio.IntBuffer. This duplicate buffer is identical to the original buffer. The method duplicate() returns the duplicate buffer that was created.

A program that demonstrates this is given as follows −

Example

 Live Demo

import java.nio.*;
import java.util.*;
public class Demo {
   public static void main(String[] args) {
      int n = 5;
      try {
         IntBuffer buffer1 = IntBuffer.allocate(n);
         buffer1.put(8);
         buffer1.put(1);
         buffer1.put(3);
         buffer1.put(7);
         buffer1.put(5);
         buffer1.rewind();
         System.out.println("The Original IntBuffer is: " + Arrays.toString(buffer1.array()));
         IntBuffer buffer2 = buffer1.duplicate();
         System.out.print("The Duplicate IntBuffer is: " + Arrays.toString(buffer2.array()));
      } catch (IllegalArgumentException e) {
         System.out.println("Error!!! IllegalArgumentException");
      } catch (ReadOnlyBufferException e){
         System.out.println("Error!!! ReadOnlyBufferException");
      }
   }
}

The output of the above program is as follows −

Output

The Original IntBuffer is: [8, 1, 3, 7, 5]
The Duplicate IntBuffer is: [8, 1, 3, 7, 5]