El método mark() de java.nio.ByteBuffer Class se usa para establecer la marca de este búfer en su posición.
Sintaxis:
public ByteBuffer mark()
Valor devuelto: este método devuelve este búfer.
A continuación se muestran los ejemplos para ilustrar el método mark():
Ejemplos 1:
// Java program to demonstrate
// mark() method
import java.nio.*;
import java.util.*;
public class GFG {
public static void main(String[] args)
{
try {
byte[] barr = { 10, 20, 30, 40 };
// creating object of ByteBuffer
// and allocating size capacity
ByteBuffer bb = ByteBuffer.wrap(barr);
// try to set the position at index 2
bb.position(2);
// Set this buffer mark position
// using mark() method
bb.mark();
// try to set the position at index 4
bb.position(4);
// display position
System.out.println("position before reset: "
+ bb.position());
// try to call reset() to restore
// to the position we marked
bb.reset();
// display position
System.out.println("position after reset: "
+ bb.position());
}
catch (InvalidMarkException e) {
System.out.println("new position is less than "
+ "the position we marked before ");
System.out.println("Exception throws: " + e);
}
}
}
Producción:
position before reset: 4 position after reset: 2
Ejemplos 2: Para demostrar InvalidMarkException
// Java program to demonstrate
// mark() method
import java.nio.*;
import java.util.*;
public class GFG {
public static void main(String[] args)
{
try {
byte[] barr = { 10, 20, 30, 40 };
// creating object of ByteBuffer
// and allocating size capacity
ByteBuffer bb = ByteBuffer.wrap(barr);
// try to set the position at index 2
bb.position(2);
// Set this buffer mark position
// using mark() method
bb.mark();
// try to set the position at index 4
bb.position(1);
// display position
System.out.println("position before reset: "
+ bb.position());
// try to call reset() to restore
// to the position we marked
bb.reset();
// display position
System.out.println("position after reset: "
+ bb.position());
}
catch (InvalidMarkException e) {
System.out.println("\nnew position is less than "
+ "the position we marked before ");
System.out.println("Exception throws: " + e);
}
}
}
Producción:
position before reset: 1 new position is less than the position we marked before Exception throws: java.nio.InvalidMarkException
Referencia: https://docs.oracle.com/javase/9/docs/api/java/nio/ByteBuffer.html#mark–
Publicación traducida automáticamente
Artículo escrito por RohitPrasad3 y traducido por Barcelona Geeks. The original can be accessed here. Licence: CCBY-SA