DoubleBuffer mark() methods in Java with Examples
Last Updated :
29 Jul, 2019
The mark() method of java.nio.DoubleBuffer Class is used to mark the current position of this DoubleBuffer as the mark of this buffer.
Syntax:
public DoubleBuffer mark()
Return Value: This method returns this DoubleBuffer after setting the buffer’s mark at the current position.
Below are the examples to illustrate the mark() method:
Examples 1:
import java.nio.*;
import java.util.*;
public class GFG {
public static void main(String[] args)
{
try {
double [] darr = { 10.5 , 20.5 , 30.5 , 40.5 };
DoubleBuffer db = DoubleBuffer.wrap(darr);
db.position( 2 );
db.mark();
db.position( 4 );
System.out.println( "position before reset: "
+ db.position());
db.reset();
System.out.println( "position after reset: "
+ db.position());
}
catch (InvalidMarkException e) {
System.out.println( "New position "
+ "is less than "
+ "the position "
+ "marked before " );
System.out.println( "Exception throws: "
+ e);
}
}
}
|
Output:
position before reset: 4
position after reset: 2
Examples 2: To demonstrate InvalidMarkException
import java.nio.*;
import java.util.*;
public class GFG {
public static void main(String[] args)
{
try {
double [] darr = { 10.5 , 20.5 , 30.5 , 40.5 };
DoubleBuffer db = DoubleBuffer.wrap(darr);
db.position( 2 );
db.mark();
db.position( 1 );
System.out.println( "position before reset: "
+ db.position());
db.reset();
System.out.println( "position after reset: "
+ db.position());
}
catch (InvalidMarkException e) {
System.out.println( "\nNew position "
+ "is less than "
+ "the position "
+ "marked before " );
System.out.println( "Exception throws: "
+ e);
}
}
}
|
Output:
position before reset: 1
New position is less than the position marked before
Exception throws: java.nio.InvalidMarkException
Reference: https://docs.oracle.com/javase/9/docs/api/java/nio/DoubleBuffer.html#mark–
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