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–