Buffer reset() methods in Java with Examples
The reset() method of java.nio.Buffer Class is used to reset this buffer’s position to the previously-marked position. Invoking this method neither changes nor discards the mark’s value.
Syntax:
public Buffer reset()
Return Value: This method returns this buffer.
Below are the examples to illustrate the reset() method:
Examples 1:
Java
import java.nio.*;
import java.util.*;
public class GFG {
public static void main(String[] args)
{
try {
byte [] barr = { 10 , 20 , 30 , 40 };
ByteBuffer bb = ByteBuffer.wrap(barr);
Buffer buffer = (Buffer)bb;
buffer.position( 2 );
buffer.mark();
buffer.position( 4 );
System.out.println("position before reset: "
+ buffer.position());
buffer.reset();
System.out.println("position after reset: "
+ buffer.position());
}
catch (InvalidMarkException e) {
System.out.println(" new position is less than "
+ "the position we marked before ");
System.out.println("Exception throws : " + e);
}
}
}
|
Output:
position before reset: 4
position after reset: 2
Examples 2:
Java
import java.nio.*;
import java.util.*;
public class GFG {
public static void main(String[] args)
{
try {
byte [] barr = { 10 , 20 , 30 , 40 };
ByteBuffer bb = ByteBuffer.wrap(barr);
Buffer buffer = (Buffer)bb;
buffer.position( 2 );
buffer.mark();
buffer.position( 1 );
System.out.println("position before reset: "
+ buffer.position());
buffer.reset();
System.out.println("position after reset: "
+ buffer.position());
}
catch (InvalidMarkException e) {
System.out.println("\ new position is less than "
+ "the position we marked before ");
System.out.println("Exception throws : " + e);
}
}
}
|
Output:
position before reset: 1
new position is less than the position we marked before
Exception throws: java.nio.InvalidMarkException
Reference: https://docs.oracle.com/javase/9/docs/api/java/nio/Buffer.html#reset–
Last Updated :
04 Feb, 2022
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