Every primitive buffer class provide put() methods to
insert data into the buffer.
For example, ByteBuffer class provides below put methods
to insert data.
public abstract ByteBuffer put(byte b);
public abstract ByteBuffer put(int index, byte b)
public ByteBuffer put(ByteBuffer src)
In the same way, CharBuffer also provides below put
methods to insert data.
public abstract CharBuffer put(char c);
public abstract CharBuffer put(int index, char c);
public CharBuffer put(CharBuffer src)
‘put’ method writes the data to current position and
increment the position.
Let’s see an example, how can we fill the data into
ByteBuffer.
Step 1: Define
ByteBuffer instance.
ByteBuffer byteBuffer = ByteBuffer.allocate(11);
Step 2: Add data
to ByteBuffer.
byteBuffer.put((byte)'H').put((byte)'E').put((byte)'L').put((byte)'L').put((byte)'O').put((byte)'
').put((byte)'W').put((byte)'O').put((byte)'R').put((byte)'L').put((byte)'D');
Find the below working application.
package com.sample.nio; import java.nio.ByteBuffer; public class Test { public static void main(String args[]) throws Exception { /* Define new byte buffer of capacity 11 */ ByteBuffer byteBuffer = ByteBuffer.allocate(11); /* Add elements to the byte buffer */ byteBuffer.put((byte) 'H').put((byte) 'E').put((byte) 'L').put((byte) 'L').put((byte) 'O').put((byte) ' ') .put((byte) 'W').put((byte) 'O').put((byte) 'R').put((byte) 'L').put((byte) 'D'); /* Print the data in byteBuffer */ byte[] dataBytes = byteBuffer.array(); String dataStr = new String(dataBytes); System.out.println("Data : " + dataStr); } }
Output
Data : HELLO WORLD
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