Buffer remaining() methods in Java with Examples

Last Updated : 16 Jul, 2019

The remaining() method of java.nio.Buffer Class is used to return the number of elements between the current position and the limit.

Syntax:

public final int remaining()

Return Value: This method returns the number of elements remaining in this buffer.

Below are the examples to illustrate the remaining() method:

Examples 1:

// Java program to demonstrate 
// remaining() method 
  
import java.nio.*; 
import java.util.*; 
  
public class GFG { 
    public static void main(String[] args) 
    { 
  
        // Declare and initialize the byte array 
        byte[] bb = { 10, 20, 30 }; 
  
        // wrap the byte array into ByteBuffer 
        // using wrap() method 
        ByteBuffer byteBuffer = ByteBuffer.wrap(bb); 
  
        // Typecast ByteBuffer to Buffer 
        Buffer buffer = (Buffer)byteBuffer; 
  
        // get the number of element present in the Buffer 
        // using remaining() method 
        int element = buffer.remaining(); 
  
        // print the buffer 
        System.out.println("Remaining element in buffer : "
                           + element); 
    } 
} 

Output:

Remaining element in buffer : 3

Examples 2:

// Java program to demonstrate 
// remaining() method 
  
import java.nio.*; 
import java.util.*; 
  
public class GFG { 
    public static void main(String[] args) 
    { 
  
        // defining and allocating ByteBuffer 
        // using allocate() method 
        ByteBuffer byteBuffer = ByteBuffer.allocate(7); 
  
        // put byte value in byteBuffer 
        // using put() method 
        byteBuffer.put((byte)20); // 1 byte space required 
        byteBuffer.put((byte)30); // 1 byte space required 
        byteBuffer.putInt(40); // 4 byte space required 
  
        // Typecast ByteBuffer to Buffer 
        Buffer buffer = (Buffer)byteBuffer; 
  
        // get the number of element present in the Buffer 
        // using remaining() method 
        int element = buffer.remaining(); 
  
        // print the buffer 
        System.out.println("Remaining element in buffer : "
                           + element); 
    } 
} 

Output:

Remaining element in buffer : 1

Reference: https://docs.oracle.com/javase/9/docs/api/java/nio/Buffer.html#remaining–

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