El método get() de java.nio.CharBuffer Class se usa para leer el carácter en la posición actual del búfer dado y luego incrementa la posición.
Sintaxis:
public abstract char get()
Valor devuelto: este método devuelve el valor de char en la posición actual del búfer.
Excepciones: este método lanza BufferUnderflowException : si la posición actual del búfer no es más pequeña que su límite, se lanza esta excepción.
A continuación se muestran los ejemplos para ilustrar el método get() :
Ejemplo 1:
// Java program to demonstrate
// get() method
import java.nio.*;
import java.util.*;
public class GFG {
public static void main(String[] args)
{
// Declaring the capacity of the CharBuffer
int capacity = 5;
// Creating the CharBuffer
try {
// creating object of Charbuffer
// and allocating size capacity
CharBuffer cb = CharBuffer.allocate(capacity);
// putting the value in Charbuffer
cb.put('a');
cb.put('b');
cb.put('c');
cb.rewind();
// print the CharBuffer
System.out.println("Original CharBuffer: "
+ Arrays.toString(cb.array()));
// Reads the Int at this buffer's current position
// using get() method
char value = cb.get();
// print the Int value
System.out.println("Int Value: " + value);
// Reads the Int at this buffer's next position
// using get() method
char value1 = cb.get();
// print the Int value
System.out.print("Next Int Value: " + value1);
}
catch (IllegalArgumentException e) {
System.out.println("IllegalArgumentException catched");
}
catch (ReadOnlyBufferException e) {
System.out.println("ReadOnlyBufferException catched");
}
catch (BufferUnderflowException e) {
System.out.println("Exception throws: " + e);
}
}
}
Producción:
Original CharBuffer: [a, b, c, , ] Int Value: a Next Int Value: b
Ejemplos 2:
// Java program to demonstrate
// get() method
import java.nio.*;
import java.util.*;
public class GFG {
public static void main(String[] args)
{
// Declaring the capacity of the CharBuffer
int capacity = 3;
// Creating the CharBuffer
try {
// creating object of Charbuffer
// and allocating size capacity
CharBuffer cb = CharBuffer.allocate(capacity);
// putting the value in Charbuffer
cb.put('a');
cb.put('b');
// print the CharBuffer
System.out.println("Original CharBuffer: "
+ Arrays.toString(cb.array()));
// Reads the Char at this buffer's current position
// using get() method
char value = cb.get();
// print the Char value
System.out.println("Char Value: " + value);
// Reads the Char at this buffer's next position
// using get() method
System.out.print("Since the buffer current position is incremented\n");
System.out.print(" to greater than its limit ");
char value1 = cb.get();
// print the Char value
System.out.print("Next Char Value: " + value1);
}
catch (IllegalArgumentException e) {
System.out.println("IllegalArgumentException catched");
}
catch (ReadOnlyBufferException e) {
System.out.println("ReadOnlyBufferException catched");
}
catch (BufferUnderflowException e) {
System.out.println("Exception throws : " + e);
}
}
}
Producción:
Original CharBuffer: [a, b, ] Char Value: Since the buffer current position is incremented to greater than its limit Exception throws : java.nio.BufferUnderflowException
obtener (índice int)
El método get(int index) de CharBuffer se usa para leer el artículo en un índice específico.
Sintaxis:
public abstract char get(int index)
Parámetros: este método toma el índice (el índice del que se leerá el carácter) como parámetro.
Valor devuelto: este método devuelve el valor de char en el índice dado.
Excepción: este método genera una excepción IndexOutOfBoundsException . Si el índice es negativo o no menor que el límite del búfer, se lanza esta excepción.
A continuación se muestran los ejemplos para ilustrar el método get(int index):
Ejemplos 1:
// Java program to demonstrate
// get(int index) method
import java.nio.*;
import java.util.*;
public class GFG {
public static void main(String[] args)
{
// Declaring the capacity of the CharBuffer
int capacity = 3;
// Creating the CharBuffer
try {
// creating object of Charbuffer
// and allocating size capacity
CharBuffer cb = CharBuffer.allocate(capacity);
// putting the value in Charbuffer
cb.put('a');
cb.put('b');
cb.put('c');
// print the CharBuffer
System.out.println("Original CharBuffer: "
+ Arrays.toString(cb.array()));
// Reads the Char at the index 0 of the Charbuffer
// using get() method
char value0 = cb.get(0);
// print the Char value
System.out.println("Char Value at index 0: " + value0);
// Reads the Char at the index 1 of the Charbuffer
// using get() method
char value1 = cb.get(1);
// print the Char value
System.out.println("Char Value at index 1: " + value1);
// Reads the Char at the index 2 of the Charbuffer
// using get() method
char value2 = cb.get(2);
// print the Char value
System.out.println("Char Value at index 2: " + value2);
}
catch (IllegalArgumentException e) {
System.out.println("IllegalArgumentException catched");
}
catch (IndexOutOfBoundsException e) {
System.out.println("ReadOnlyBufferException catched");
}
catch (BufferUnderflowException e) {
System.out.println("Exception throws : " + e);
}
}
}
Producción:
Original CharBuffer: [a, b, c] Char Value at index 0: a Char Value at index 1: b Char Value at index 2: c
Ejemplos 2:
// Java program to demonstrate
// get() method
import java.nio.*;
import java.util.*;
public class GFG {
public static void main(String[] args)
{
// Declaring the capacity of the CharBuffer
int capacity = 3;
// Creating the CharBuffer
try {
// creating object of Charbuffer
// and allocating size capacity
CharBuffer cb = CharBuffer.allocate(capacity);
// putting the value in Charbuffer
cb.put('a');
cb.put('b');
cb.put('c');
// print the CharBuffer
System.out.println("Original CharBuffer: "
+ Arrays.toString(cb.array()));
// Reads the Char at the index 0 of the Charbuffer
// using get() method
char value0 = cb.get(0);
// print the Char value
System.out.println("Char Value at index 0: " + value0);
// Reads the Char at the index 1 of the Charbuffer
// using get() method
char value1 = cb.get(1);
// print the Char value
System.out.println("Char Value at index 1: " + value1);
// Reads the Char at the index 2 of the Charbuffer
// using get() method
System.out.println("Trying to get the Char"
+ " of index greater than its limit ");
char value2 = cb.get(4);
// print the Char value
System.out.println("Char Value at index 2: " + value2);
}
catch (IllegalArgumentException e) {
System.out.println("IllegalArgumentException catched");
}
catch (IndexOutOfBoundsException e) {
System.out.println("Exception thrown: " + e);
}
catch (BufferUnderflowException e) {
System.out.println("Exception throws : " + e);
}
}
}
Producción:
Original CharBuffer: [a, b, c] Char Value at index 0: a Char Value at index 1: b Trying to get the Char of index greater than its limit Exception thrown: java.lang.IndexOutOfBoundsException