El método array() de java.nio.DoubleBuffer Class se usa para devolver la doble array que respalda este búfer. Las modificaciones al contenido de este búfer harán que se modifique el contenido de la array devuelta, y viceversa. Invoke() el método hasArray() se usa antes de invocar este método para garantizar que este búfer tenga una array de respaldo accesible
Sintaxis:
public final float[] array()
Valor devuelto: este método devuelve la array que respalda este búfer.
Excepción: este método lanza la excepción ReadOnlyBufferException si este búfer está respaldado por una array pero es de solo lectura.
El siguiente programa ilustra el método array():
Ejemplos 1:
// Java program to demonstrate
// array() 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 db = DoubleBuffer.allocate(capacity);
// putting the value in Doublebuffer
db.put(8.56F);
db.put(2, 9.61F);
db.rewind();
// getting array from db DoubleBuffer using array() method
double[] dbb = db.array();
// printing the DoubleBuffer db
System.out.println("DoubleBuffer: "
+ Arrays.toString(dbb));
}
catch (IllegalArgumentException e) {
System.out.println("IllegalArgumentException catched");
}
catch (ReadOnlyBufferException e) {
System.out.println("ReadOnlyBufferException catched");
}
}
}
DoubleBuffer: [8.5600004196167, 0.0, 9.609999656677246, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0]
Ejemplo 2:
// Java program to demonstrate
// array() method
import java.nio.*;
import java.util.*;
public class GFG {
public static void main(String[] args)
{
// Declaring the capacity of the db
int capacity1 = 10;
// Declaring the capacity of the db1
int capacity2 = 5;
// Creating the DoubleBuffer
try {
//
// db
//
// creating object of Doublebuffer db
// and allocating size capacity
DoubleBuffer db = DoubleBuffer.allocate(capacity1);
// putting the value in db
db.put(9.56F);
db.put(2, 7.61F);
db.put(3, 4.61F);
db.rewind();
// print the DoubleBuffer
System.out.println("DoubleBuffer db: "
+ Arrays.toString(db.array()));
//
// db1
//
// creating object of Doublebuffer db1
// and allocating size capacity
DoubleBuffer db1 = DoubleBuffer.allocate(capacity2);
// putting the value in db1
db1.put(1, 4.56F);
db1.put(2, 6.45F);
db1.rewind();
// print the DoubleBuffer
System.out.println("\nDoubleBuffer db1: "
+ Arrays.toString(db1.array()));
// Creating a read-only copy of DoubleBuffer
// using asReadOnlyBuffer() method
DoubleBuffer readOnlyDb = db.asReadOnlyBuffer();
// print the DoubleBuffer
System.out.print("\nReadOnlyBuffer DoubleBuffer: ");
while (readOnlyDb.hasRemaining())
System.out.print(readOnlyDb.get() + ", ");
// try to change readOnlyDb
System.out.println("\n\nTrying to get the array"
+ " from ReadOnlyDb for editing");
Arrays.toString(readOnlyDb.array());
}
catch (IllegalArgumentException e) {
System.out.println("IllegalArgumentException catched");
}
catch (ReadOnlyBufferException e) {
System.out.println("Exception thrown: " + e);
}
}
}
DoubleBuffer db: [9.5600004196167, 0.0, 7.610000133514404, 4.610000133514404, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0] DoubleBuffer db1: [0.0, 4.559999942779541, 6.449999809265137, 0.0, 0.0] ReadOnlyBuffer DoubleBuffer: 9.5600004196167, 0.0, 7.610000133514404, 4.610000133514404, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, Trying to get the array from ReadOnlyDb for editing Exception thrown: java.nio.ReadOnlyBufferException
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Artículo escrito por pawan_asipu y traducido por Barcelona Geeks. The original can be accessed here. Licence: CCBY-SA