LongBuffer rewind() method in Java with Examples
The rewind() method of java.nio.LongBuffer Class is used to rewind this buffer. By rewinding this Buffer, the following actions are taken:
- Current position is set to zero
- the mark is discarded, if any, but the mark value is unchanged.
Syntax:
public LongBuffer rewind()
Parameter: This method do not accept any parameter.
Return Value: This method returns this buffer after rewinding.
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 LongBuffer // using allocate() method LongBuffer longBuffer = LongBuffer.allocate( 4 ); // put long value in longBuffer // using put() method longBuffer.put( 10 ); longBuffer.put( 20 ); // print the long buffer System.out.println( "Buffer before operation: " + Arrays.toString( longBuffer.array()) + "\nPosition: " + longBuffer.position() + "\nLimit: " + longBuffer.limit()); // rewind the Buffer // using rewind() method longBuffer.rewind(); // print the longbuffer System.out.println( "\nBuffer after operation: " + Arrays.toString( longBuffer.array()) + "\nPosition: " + longBuffer.position() + "\nLimit: " + longBuffer.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 LongBuffer // using allocate() method LongBuffer longBuffer = LongBuffer.allocate( 5 ); // put long value in longBuffer // using put() method longBuffer.put( 10 ); longBuffer.put( 20 ); longBuffer.put( 30 ); // mark will be going to // discarded by rewind() longBuffer.mark(); // print the buffer System.out.println( "Buffer before operation: " + Arrays.toString( longBuffer.array()) + "\nPosition: " + longBuffer.position() + "\nLimit: " + longBuffer.limit()); // Rewind the Buffer // using rewind() method longBuffer.rewind(); // print the buffer System.out.println( "\nBuffer after operation: " + Arrays.toString( longBuffer.array()) + "\nPosition: " + longBuffer.position() + "\nLimit: " + longBuffer.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/LongBuffer.html#mark–