Nio: Set and get the buffer limit

By using the ‘limit’ method, you can set the buffer limit.

Test.java

package com.sample.nio;

import java.nio.ByteBuffer;

public class Test {

 public static void main(String args[]) throws Exception {
  ByteBuffer byteBuffer = ByteBuffer.allocate(10);

  System.out.println("Current limit of the buffer " + byteBuffer.limit());

  byteBuffer.limit(5);

  System.out.println("Current limit of the buffer " + byteBuffer.limit());
 }
}

Output

Current limit of the buffer 10

Current limit of the buffer 5

Even though capacity > limit, you can’t insert/get the elements > limit th position.

Test.java

package com.sample.nio;

import java.nio.ByteBuffer;

public class Test {

 public static void main(String args[]) throws Exception {
  ByteBuffer byteBuffer = ByteBuffer.allocate(10);

  System.out.println("Current limit of the buffer " + byteBuffer.limit());

  byteBuffer.limit(5);

  System.out.println("Current limit of the buffer " + byteBuffer.limit());
  
  byteBuffer.put(6, (byte) 'H');
  
 }
}

Output

Current limit of the buffer 10

Current limit of the buffer 5

Exception in thread "main" java.lang.IndexOutOfBoundsException

         at java.nio.Buffer.checkIndex(Unknown Source)

         at java.nio.HeapByteBuffer.put(Unknown Source)

         at com.sample.nio.Test.main(Test.java:16)

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