DoubleBuffer allocate() method in Java

Java 8Object Oriented ProgrammingProgramming

A new DoubleBuffer can be allocated using the method allocate() in the class java.nio.DoubleBuffer. This method requires a single parameter i.e. the capacity of the buffer. It returns the new DoubleBuffer that is allocated. If the capacity provided is negative, then the IllegalArgumentException is thrown.

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 buffer = DoubleBuffer.allocate(5);
         buffer.put(4.5D);
         buffer.put(1.2D);
         buffer.put(3.9D);
         buffer.put(7.5D);
         buffer.put(5.8D);
         buffer.rewind();
         System.out.println("The DoubleBuffer is: " + Arrays.toString(buffer.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 DoubleBuffer is: [4.5, 1.2, 3.9, 7.5, 5.8]
raja
Published on 01-Mar-2019 11:02:06
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