IntBuffer rewind() method in Java with Examples
The rewind() method of java.nio.IntBuffer Class is used to rewind this buffer. The position is set to zero and the mark is discarded. Invoke this method before a sequence of channel-write or get operations, assuming that the limit has already been set appropriately. Invoking this method neither changes nor discards the mark’s value.
Syntax:
public final IntBuffer rewind()
Parameter: The method do not take any parameter.
Return Value: This method returns this buffer.
Below are the examples to illustrate the rewind() method:
Examples 1:
// Java program to demonstrate // rewind() method import java.nio.*; import java.util.*; public class GFG { public static void main(String[] args) { // defining and allocating IntBuffer // using allocate() method IntBuffer intBuffer = IntBuffer.allocate( 4 ); // put char value in intBuffer // using put() method intBuffer.put( 10 ); intBuffer.put( 20 ); // print the int buffer System.out.println( "Buffer before operation: " + Arrays.toString( intBuffer.array()) + "\nPosition: " + intBuffer.position() + "\nLimit: " + intBuffer.limit()); // rewind the Buffer // using rewind() method intBuffer.rewind(); // print the intbuffer System.out.println( "\nBuffer after operation: " + Arrays.toString( intBuffer.array()) + "\nPosition: " + intBuffer.position() + "\nLimit: " + intBuffer.limit()); } } |
Output:
Buffer before operation: [10, 20, 0, 0] Position: 2 Limit: 4 Buffer after operation: [10, 20, 0, 0] Position: 0 Limit: 4
Examples 2:
// Java program to demonstrate // rewind() method import java.nio.*; import java.util.*; public class GFG { public static void main(String[] args) { // defining and allocating IntBuffer // using allocate() method IntBuffer intBuffer = IntBuffer.allocate( 5 ); // put int value in IntBuffer // using put() method intBuffer.put( 10 ); intBuffer.put( 20 ); intBuffer.put( 30 ); // mark will be going to // discarded by rewind() intBuffer.mark(); // print the buffer System.out.println( "Buffer before operation: " + Arrays.toString( intBuffer.array()) + "\nPosition: " + intBuffer.position() + "\nLimit: " + intBuffer.limit()); // Rewind the Buffer // using rewind() method intBuffer.rewind(); // print the buffer System.out.println( "\nBuffer after operation: " + Arrays.toString( intBuffer.array()) + "\nPosition: " + intBuffer.position() + "\nLimit: " + intBuffer.limit()); } } |
Output:
Buffer before operation: [10, 20, 30, 0, 0] Position: 3 Limit: 5 Buffer after operation: [10, 20, 30, 0, 0] Position: 0 Limit: 5
Reference: https://docs.oracle.com/javase/9/docs/api/java/nio/IntBuffer.html#rewind–