DoubleBuffer equals() method in Java

Java 8Object Oriented ProgrammingProgramming

The equality of two buffers can be checked using the method equals() in the class java.nio.DoubleBuffer. Two buffers are equal if they have the same type of elements, the same number of elements and the same sequence of elements. The method equals() returns true if the buffers are equal and false otherwise.

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 {
         DoubleBuffer buffer1 = DoubleBuffer.allocate(n);
         buffer1.put(4.5D);
         buffer1.put(1.2D);
         buffer1.put(3.9D);
         buffer1.put(7.5D);
         buffer1.put(5.8D);
         buffer1.rewind();
         System.out.println("The first DoubleBuffer is: " + Arrays.toString(buffer1.array()));
         DoubleBuffer buffer2 = DoubleBuffer.allocate(n);
         buffer2.put(4.5D);
         buffer2.put(1.2D);
         buffer2.put(3.9D);
         buffer2.put(7.5D);
         buffer2.put(5.8D);
         buffer2.rewind();
         System.out.println("The second DoubleBuffer is: " + Arrays.toString(buffer2.array()));
         boolean flag = buffer1.equals(buffer2);
         if (flag)
            System.out.println("\nBoth the buffers are equal");
         else
            System.out.println("\nBoth the buffers are not equal");
      } 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 first DoubleBuffer is: [4.5, 1.2, 3.9, 7.5, 5.8]
The second DoubleBuffer is: [4.5, 1.2, 3.9, 7.5, 5.8]

Both the buffers are equal
raja
Published on 01-Mar-2019 11:19:40
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