The clear() method of java.nio.IntBuffer Class is used to clear this buffer. While clearing this buffer following changes are done:
- the position is set to zero
- the limit is set to the capacity
- the mark is discarded.
Syntax:
public final IntBuffer clear()
Parameter: The method do not take any parameter.
Return Value: This method returns this IntBuffer instance after clearing all the data from it.
Below are the examples to illustrate the clear() method:
Examples 1:
// Java program to demonstrate// clear() method  import java.nio.*;import java.util.*;  public class GFG {      public static void main(String[] args)    {          try {              int[] iarr = { 10, 20, 30, 40 };              // creating object of IntBuffer            // and allocating size capacity            IntBuffer ib                = IntBuffer.wrap(iarr);              // try to set the position at index 2            ib.position(2);              // Set this buffer mark position            // using mark() method            ib.mark();              // try to set the position at index 4            ib.position(4);              // display position            System.out.println("position before reset: "                               + ib.position());              // try to call clear() to restore            // to the position at index 0            // by discarding the mark            ib.clear();              // display position            System.out.println("position after reset: "                               + ib.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: 0
Examples 2:
// Java program to demonstrate// clear() method  import java.nio.*;import java.util.*;  public class GFG {      public static void main(String[] args)    {          int[] iarr = { 10, 20, 30, 40 };          // creating object of IntBuffer        // and allocating size capacity        IntBuffer ib = IntBuffer.wrap(iarr);          // try to set the position at index 3        ib.position(3);          // display position        System.out.println("position before clear: "                           + ib.position());          // try to call clear() to restore        // to the position at index 0        // by discarding the mark        ib.clear();          // display position        System.out.println("position after clear: "                           + ib.position());    }} |
Output:
position before clear: 3 position after clear: 0
Reference: https://docs.oracle.com/javase/9/docs/api/java/nio/IntBuffer.html#rewind–
