putChar(valor de carácter)
El método putChar(valor char) de java.nio.ByteBuffer Class se usa para escribir dos bytes que contienen el valor char dado, en el orden de bytes actual, en este búfer en la posición actual y luego incrementa la posición en dos.
Sintaxis:
public abstract ByteBuffer putChar(char value)
Parámetros: este método toma el valor del carácter que se va 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 putChar(valor char):
Ejemplo 1:
// Java program to demonstrate // putChar() method import java.nio.*; import java.util.*; public class GFG { public static void main(String[] args) { // Declaring the capacity of the ByteBuffer int capacity = 6; // Creating the ByteBuffer try { // creating object of ByteBuffer // and allocating size capacity ByteBuffer bb = ByteBuffer.allocate(capacity); // putting the value in ByteBuffer // using putChar() method bb.putChar('a') .putChar('b') .putChar('c') .rewind(); // print the ByteBuffer System.out.print("Original ByteBuffer: [ "); for (int i = 1; i <= capacity / 2; i++) System.out.print(bb.getChar() + " "); System.out.print("]"); } catch (BufferOverflowException e) { System.out.println("Exception throws : " + e); } catch (ReadOnlyBufferException e) { System.out.println("Exception throws : " + e); } } }
Original ByteBuffer: [ a b c ]
Ejemplo 2: Para demostrar BufferOverflowException.
// Java program to demonstrate // putChar() method import java.nio.*; import java.util.*; public class GFG { public static void main(String[] args) { // Declaring the capacity of the ByteBuffer int capacity = 6; // Creating the ByteBuffer try { // creating object of ByteBuffer // and allocating size capacity ByteBuffer bb = ByteBuffer.allocate(capacity); // putting the value in ByteBuffer // using putChar() method bb.putChar('a') .putChar('b') .putChar('c') .rewind(); // print the ByteBuffer System.out.print("Original ByteBuffer: [ "); for (int i = 1; i <= capacity / 2; i++) System.out.print(bb.getChar() + " "); System.out.print("]\n\n"); // putting the value in ByteBuffer // using putChar() method bb.putChar('d'); } catch (BufferOverflowException e) { System.out.println("buffer'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: [ a b c ] buffer's current position is not smaller than its limit Exception throws : java.nio.BufferOverflowException
Ejemplos 3: Para demostrar ReadOnlyBufferException.
// Java program to demonstrate // putChar() method import java.nio.*; import java.util.*; public class GFG { public static void main(String[] args) { // Declaring the capacity of the ByteBuffer int capacity = 6; // Creating the ByteBuffer try { // creating object of ByteBuffer // and allocating size capacity ByteBuffer bb = ByteBuffer.allocate(capacity); // putting the value in ByteBuffer // using putChar() method bb.putChar('a') .putChar('b') .putChar('c') .rewind(); // print the ByteBuffer System.out.print("Original ByteBuffer: [ "); for (int i = 1; i <= capacity / 2; i++) System.out.print(bb.getChar() + " "); System.out.print("]\n"); // Creating a read-only copy of ByteBuffer // using asReadOnlyBuffer() method ByteBuffer bb1 = bb.asReadOnlyBuffer(); System.out.println("\nTrying to put the char value" + " in read-only buffer"); // putting the value in readonly ByteBuffer // using putChart() method bb1.putChar('d'); } catch (BufferOverflowException e) { System.out.println("Exception throws : " + e); } catch (ReadOnlyBufferException e) { System.out.println("Exception throws : " + e); } } }
Original ByteBuffer: [ a b c ] Trying to put the char value in read-only buffer Exception throws : java.nio.ReadOnlyBufferException
putChar(índice int, valor char)
El método putChar(int index, char value) de java.nio.ByteBuffer Class se usa para escribir dos bytes que contienen el valor char dado, en el orden de bytes actual, en este búfer en el índice dado.
Sintaxis:
public abstract ByteBuffer putChar(int index, char value)
Parámetros: Este método toma los siguientes argumentos como parámetro:
- index : el índice en el que se escribirá el byte
- value : El valor del carácter 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 putChar(int index, char value):
Ejemplo 1:
// Java program to demonstrate // putChar() method import java.nio.*; import java.util.*; public class GFG { public static void main(String[] args) { // Declaring the capacity of the ByteBuffer int capacity = 6; // Creating the ByteBuffer try { // creating object of ByteBuffer // and allocating size capacity ByteBuffer bb = ByteBuffer.allocate(capacity); // putting the value in ByteBuffer // using putChar() at index 0 bb.putChar(0, 'a'); // putting the value in ByteBuffer // using putChar() at index 2 bb.putChar(2, 'b'); // putting the value in ByteBuffer // using putChar() at index 1 bb.putChar(4, 'c'); // rewinding the ByteBuffer bb.rewind(); // print the ByteBuffer System.out.print("Original ByteBuffer: [ "); for (int i = 1; i <= capacity / 2; i++) System.out.print(bb.getChar() + " "); System.out.print("]\n"); } catch (IndexOutOfBoundsException e) { System.out.println("Exception throws : " + e); } catch (ReadOnlyBufferException e) { System.out.println("Exception throws : " + e); } } }
Original ByteBuffer: [ a b c ]
Ejemplo 2: Para demostrar IndexOutOfBoundsException.
// Java program to demonstrate // putChar() method import java.nio.*; import java.util.*; public class GFG { public static void main(String[] args) { // Declaring the capacity of the ByteBuffer int capacity = 6; // Creating the ByteBuffer try { // creating object of ByteBuffer // and allocating size capacity ByteBuffer bb = ByteBuffer.allocate(capacity); // putting the value in ByteBuffer // using putChar() at index 0 bb.putChar(0, 'a'); // putting the value in ByteBuffer // using putChar() at index 2 bb.putChar(2, 'b'); // putting the value in ByteBuffer // using putChar() at index 1 bb.putChar(4, 'c'); // rewinding the ByteBuffer bb.rewind(); // print the ByteBuffer System.out.print("Original ByteBuffer: [ "); for (int i = 1; i <= capacity / 2; i++) System.out.print(bb.getChar() + " "); System.out.print("]\n"); // putting the value in ByteBuffer // using put() at index -1 bb.putChar(-1, 'd'); } 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: [ a b c ] 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 // putChar() method import java.nio.*; import java.util.*; public class GFG { public static void main(String[] args) { // Declaring the capacity of the ByteBuffer int capacity = 6; // 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 putChar() method bb1.putChar(4, 'c'); } 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#putChar-char-
- https://docs.oracle.com/javase/9/docs/api/java/nio/ByteBuffer.html#putChar-int-char-
Publicación traducida automáticamente
Artículo escrito por RohitPrasad3 y traducido por Barcelona Geeks. The original can be accessed here. Licence: CCBY-SA