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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:

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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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