Método DoubleBuffer slice() en Java con ejemplos

El método slice() de java.nio.DoubleBuffer Class se usa para crear un nuevo búfer doble cuyo contenido es una subsecuencia compartida del contenido del búfer dado.

El contenido del nuevo búfer comenzará en la posición actual de este búfer. Los cambios en el contenido de este búfer serán visibles en el nuevo búfer y viceversa. Los valores de posición, límite y marca de los dos búferes serán independientes.

La posición del nuevo búfer será cero, su capacidad y su límite será el número de dobles restantes en este búfer, y su marca será indefinida. El nuevo búfer será directo si, y solo si, este búfer es directo, y será de solo lectura si, y solo si, este búfer es de solo lectura.

Sintaxis: 

public abstract DoubleBuffer slice()

Valor de retorno: este método devuelve el nuevo búfer doble.

A continuación se muestran los ejemplos para ilustrar el método slice():

Ejemplos 1: 

// Java program to demonstrate
// slice() method
 
import java.nio.*;
import java.util.*;
 
public class GFG {
 
    public static void main(String[] args)
    {
 
        // Declaring the capacity of the DoubleBuffer
        int capacity = 10;
 
        // Creating the DoubleBuffer
        try {
 
            // creating object of Doublebuffer
            // and allocating size capacity
            DoubleBuffer fb1 = DoubleBuffer.allocate(capacity);
 
            // putting the value in Doublebuffer
            fb1.put(8.56F);
            fb1.put(9.61F);
 
            // print the DoubleBuffer
            System.out.println("Original DoubleBuffer: "
                               + Arrays.toString(fb1.array()));
 
            // print the DoubleBuffer position
            System.out.println("\nposition:  " + fb1.position());
 
            // print the DoubleBuffer capacity
            System.out.println("\ncapacity:  " + fb1.capacity());
 
            // Creating a shared subsequence buffer of given DoubleBuffer
            // using slice() method
            DoubleBuffer fb2 = fb1.slice();
 
            // print the shared subsequence buffer
            System.out.println("\nshared subsequence DoubleBuffer: "
                               + Arrays.toString(fb2.array()));
 
            // print the DoubleBuffer position
            System.out.println("\nposition:  " + fb2.position());
 
            // print the DoubleBuffer capacity
            System.out.println("\ncapacity:  " + fb2.capacity());
        }
 
        catch (IllegalArgumentException e) {
 
            System.out.println("IllegalArgumentException catched");
        }
 
        catch (ReadOnlyBufferException e) {
 
            System.out.println("ReadOnlyBufferException catched");
        }
    }
}

Original DoubleBuffer: [8.5600004196167, 9.609999656677246, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0]

position:  2

capacity:  10

shared subsequence DoubleBuffer: [8.5600004196167, 9.609999656677246, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0]

position:  0

capacity:  8

Ejemplos 2: 

// Java program to demonstrate
// slice() method
 
import java.nio.*;
import java.util.*;
 
public class GFG {
 
    public static void main(String[] args)
    {
 
        // Declaring the capacity of the DoubleBuffer
        int capacity = 10;
 
        // Creating the DoubleBuffer
        try {
 
            // creating object of Doublebuffer
            // and allocating size capacity
            DoubleBuffer fb1 = DoubleBuffer.allocate(capacity);
 
            // putting the value in Doublebuffer
            fb1.put(8.56F);
            fb1.put(9.61F);
            fb1.put(0.56F);
            fb1.put(3.61F);
 
            // print the DoubleBuffer
            System.out.println("Original DoubleBuffer: "
                               + Arrays.toString(fb1.array()));
 
            // print the DoubleBuffer position
            System.out.println("\nposition:  " + fb1.position());
 
            // print the DoubleBuffer capacity
            System.out.println("\ncapacity:  " + fb1.capacity());
 
            // Creating a shared subsequence buffer of given DoubleBuffer
            // using slice() method
            DoubleBuffer fb2 = fb1.slice();
            fb2.put(2.34F);
            fb2.put(6.34F);
 
            // print the shared subsequence buffer
            System.out.println("\nshared subsequence DoubleBuffer: "
                               + Arrays.toString(fb2.array()));
 
            // print the DoubleBuffer position
            System.out.println("\nposition:  " + fb2.position());
 
            // print the DoubleBuffer capacity
            System.out.println("\ncapacity:  " + fb2.capacity());
        }
 
        catch (IllegalArgumentException e) {
 
            System.out.println("IllegalArgumentException catched");
        }
 
        catch (ReadOnlyBufferException e) {
 
            System.out.println("ReadOnlyBufferException catched");
        }
    }
}

Original DoubleBuffer: [8.5600004196167, 9.609999656677246, 0.5600000023841858, 3.609999895095825, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0]

position:  4

capacity:  10

shared subsequence DoubleBuffer: [8.5600004196167, 9.609999656677246, 0.5600000023841858, 3.609999895095825, 2.3399999141693115, 6.340000152587891, 0.0, 0.0, 0.0, 0.0]

position:  2

capacity:  6