putDouble(doble valor)
El método putDouble(doble valor) de java.nio.ByteBuffer Class se usa para escribir ocho bytes que contienen el valor doble dado, en el orden de bytes actual, en este búfer en la posición actual y luego incrementa la posición en ocho.
Sintaxis:
public abstract ByteBuffer putDouble?(double value)
Parámetros: Este método toma el valor doble a escribir.
Valor devuelto: este método devuelve este búfer.
Excepción: este método arroja las siguientes excepciones:
- BufferOverflowException: si la posición actual de este búfer no es más pequeña que su límite
- ReadOnlyBufferException : si este búfer es de solo lectura
A continuación se muestran los ejemplos para ilustrar el método putDouble(doble valor):
Ejemplo 1:
// Java program to demonstrate // putDouble() method import java.nio.*; import java.util.*; public class GFG { public static void main(String[] args) { // Declaring the capacity of the ByteBuffer int capacity = 24; // Creating the ByteBuffer try { // creating object of ByteBuffer // and allocating size capacity ByteBuffer bb = ByteBuffer.allocate(capacity); // putting the value in ByteBuffer // using putDouble() method bb.putDouble(23.4) .putDouble(234.5) .putDouble(34.56) .rewind(); // print the ByteBuffer System.out.print("Original ByteBuffer: [ "); for (int i = 1; i <= capacity / 8; i++) System.out.print(bb.getDouble() + " "); System.out.print("]"); } catch (BufferOverflowException e) { System.out.println("Exception throws : " + e); } catch (ReadOnlyBufferException e) { System.out.println("Exception throws : " + e); } } }
Original ByteBuffer: [ 23.4 234.5 34.56 ]
Ejemplo 2: Para demostrar BufferOverflowException.
// Java program to demonstrate // putDouble() method import java.nio.*; import java.util.*; public class GFG { public static void main(String[] args) { // Declaring the capacity of the ByteBuffer int capacity = 24; // Creating the ByteBuffer try { // creating object of ByteBuffer // and allocating size capacity ByteBuffer bb = ByteBuffer.allocate(capacity); // putting the value in ByteBuffer // using putDouble() method bb.putDouble(23.4) .putDouble(234.5) .putDouble(34.56) .rewind(); // print the ByteBuffer System.out.print("Original ByteBuffer: [ "); for (int i = 1; i <= capacity / 8; i++) System.out.print(bb.getDouble() + " "); System.out.print("]"); // putting the value in ByteBuffer // using putDouble() method bb.putDouble(234.55); } catch (BufferOverflowException e) { System.out.println("\n\nbuffer's current position" + " is not smaller than" + " its limit"); System.out.println("Exception throws : " + e); } catch (ReadOnlyBufferException e) { System.out.println("Exception throws : " + e); } } }
Original ByteBuffer: [ 23.4 234.5 34.56 ] buffer's current position is not smaller than its limit Exception throws : java.nio.BufferOverflowException
Ejemplos 3: Para demostrar ReadOnlyBufferException.
// Java program to demonstrate // putDouble() method import java.nio.*; import java.util.*; public class GFG { public static void main(String[] args) { // Declaring the capacity of the ByteBuffer int capacity = 24; // Creating the ByteBuffer try { // creating object of ByteBuffer // and allocating size capacity ByteBuffer bb = ByteBuffer.allocate(capacity); // putting the value in ByteBuffer // using putDouble() method bb.putDouble(23.4) .putDouble(234.5) .putDouble(34.56) .rewind(); // print the ByteBuffer System.out.print("Original ByteBuffer: [ "); for (int i = 1; i <= capacity / 8; i++) System.out.print(bb.getDouble() + " "); System.out.print("]"); // Creating a read-only copy of ByteBuffer // using asReadOnlyBuffer() method ByteBuffer bb1 = bb.asReadOnlyBuffer(); System.out.println("\n\nTrying to put the char value" + " in read-only buffer"); // putting the value in readonly ByteBuffer // using putDouble() method bb1.putDouble(234.5); } catch (BufferOverflowException e) { System.out.println("Exception throws : " + e); } catch (ReadOnlyBufferException e) { System.out.println("Exception throws : " + e); } } }
Original ByteBuffer: [ 23.4 234.5 34.56 ] Trying to put the char value in read-only buffer Exception throws : java.nio.ReadOnlyBufferException
putDouble(índice int, valor doble)
El método putDouble(int index, double value) de java.nio.ByteBuffer Class se usa para escribir ocho bytes que contienen el valor doble dado, en el orden de bytes actual, en este búfer en el índice dado.
Sintaxis:
public abstract ByteBuffer putDouble(int index, double value)
Parámetros: Este método toma los siguientes argumentos como parámetro:
- index : el índice en el que se escribirá el byte
- value : El valor doble que se va a escribir
Valor devuelto: este método devuelve este búfer.
Excepción: este método arroja la siguiente excepción:
- IndexOutOfBoundsException: si el índice es negativo o no más pequeño que el límite del búfer
- ReadOnlyBufferException : si este búfer es de solo lectura
A continuación se muestran los ejemplos para ilustrar el método put(índice int, valor doble):
Ejemplo 1:
// Java program to demonstrate // putDouble() method import java.nio.*; import java.util.*; public class GFG { public static void main(String[] args) { // Declaring the capacity of the ByteBuffer int capacity = 24; // Creating the ByteBuffer try { // creating object of ByteBuffer // and allocating size capacity ByteBuffer bb = ByteBuffer.allocate(capacity); // putting the value in ByteBuffer // using putDouble() at index 0 bb.putDouble(0, 23.45); // putting the value in ByteBuffer // using putDouble() at index 8 bb.putDouble(8, 34.56); // putting the value in ByteBuffer // using putDouble() at index 16 bb.putDouble(16, 27.56); // rewinding the ByteBuffer bb.rewind(); // print the ByteBuffer System.out.print("Original ByteBuffer: [ "); for (int i = 1; i <= capacity / 8; i++) System.out.print(bb.getDouble() + " "); System.out.print("]\n"); } catch (IndexOutOfBoundsException e) { System.out.println("Exception throws : " + e); } catch (ReadOnlyBufferException e) { System.out.println("Exception throws : " + e); } } }
Original ByteBuffer: [ 23.45 34.56 27.56 ]
Ejemplo 2: Para demostrar IndexOutOfBoundsException.
// Java program to demonstrate // putDouble() method import java.nio.*; import java.util.*; public class GFG { public static void main(String[] args) { // Declaring the capacity of the ByteBuffer int capacity = 24; // Creating the ByteBuffer try { // creating object of ByteBuffer // and allocating size capacity ByteBuffer bb = ByteBuffer.allocate(capacity); // putting the value in ByteBuffer // using putDouble() at index 0 bb.putDouble(0, 23.45); // putting the value in ByteBuffer // using putDouble() at index 8 bb.putDouble(8, 34.56); // putting the value in ByteBuffer // using putDouble() at index 16 bb.putDouble(16, 27.56); // rewinding the ByteBuffer bb.rewind(); // print the ByteBuffer System.out.print("Original ByteBuffer: [ "); for (int i = 1; i <= capacity / 8; i++) System.out.print(bb.getDouble() + " "); System.out.print("]\n"); // putting the value in ByteBuffer // using putDouble() at index -1 bb.putDouble(-1, 45.67); } catch (IndexOutOfBoundsException e) { System.out.println("\nindex is negative or not smaller " + "than the buffer's limit"); System.out.println("Exception throws : " + e); } catch (ReadOnlyBufferException e) { System.out.println("Exception throws : " + e); } } }
Original ByteBuffer: [ 23.45 34.56 27.56 ] index is negative or not smaller than the buffer's limit Exception throws : java.lang.IndexOutOfBoundsException
Ejemplo 3: Para demostrar ReadOnlyBufferException.
// Java program to demonstrate // putDouble() method import java.nio.*; import java.util.*; public class GFG { public static void main(String[] args) { // Declaring the capacity of the ByteBuffer int capacity = 8; // Creating the ByteBuffer try { // creating object of ByteBuffer // and allocating size capacity ByteBuffer bb = ByteBuffer.allocate(capacity); // Creating a read-only copy of ByteBuffer // using asReadOnlyBuffer() method ByteBuffer bb1 = bb.asReadOnlyBuffer(); System.out.println("Trying to put the byte value" + " in read-only buffer"); // putting the value in readonly ByteBuffer // using putDouble() method bb1.putDouble(0, 'a'); } catch (IndexOutOfBoundsException e) { System.out.println("Exception throws : " + e); } catch (ReadOnlyBufferException e) { System.out.println("Exception throws : " + e); } } }
Trying to put the byte value in read-only buffer Exception throws : java.nio.ReadOnlyBufferException
Referencia:
- https://docs.oracle.com/javase/9/docs/api/java/nio/ByteBuffer.html#putDouble-double-
- https://docs.oracle.com/javase/9/docs/api/java/nio/ByteBuffer.html#putDouble-int-double-
Publicación traducida automáticamente
Artículo escrito por RohitPrasad3 y traducido por Barcelona Geeks. The original can be accessed here. Licence: CCBY-SA