CharBuffer get() methods in Java

The get() method of java.nio.CharBuffer Class is used to reads the char at the given buffer’s current position, and then increments the position.

Syntax:

public abstract char get()

Return Value: This method returns the char value at the buffer’s current position.

Exceptions: This method throws BufferUnderflowException – If the buffer’s current position is not smaller than its limit, then this exception is thrown.

Below are the examples to illustrate the get() method:

Example 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); 
        } 
    } 
} 

Output:

Original CharBuffer: [a, b, c, , ]
Int Value: a
Next Int Value: b

Examples 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); 
        } 
    } 
} 

Output:

Original CharBuffer: [a, b, ]
Char Value: 
Since the buffer current position is incremented
to greater than its limit Exception throws : java.nio.BufferUnderflowException

get(int index)

The get(int index) method of CharBuffer is used to read the article at a specified index.

Syntax :

public abstract char get(int index)

Parameters: This method takes index (The index from which the char will be read) as a parameter.

Return Value: This method returns the char value at the given index.

Exception: This method throws IndexOutOfBoundsException. If index is negative or not smaller than the buffer’s limit this exception is thrown.

Below are the examples to illustrate the get(int index) method:

Examples 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); 
        } 
    } 
} 

Output:

Original CharBuffer: [a, b, c]
Char Value at index 0: a
Char Value at index 1: b
Char Value at index 2: c

Examples 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); 
        } 
    } 
} 

Output:

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

get(int index)

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