ByteBuffer asCharBuffer() method in Java with Examples
The asCharBuffer() method of java.nio.ByteBuffer class is used to create a view of this byte buffer as a char buffer.
The content of the new buffer will start at this buffer’s current position. Changes to this buffer’s content will be visible in the new buffer, and vice versa; the two buffers’ position, limit, and mark values will be independent.
The new buffer’s position will be zero, its capacity and its limit will be the number of bytes remaining in this buffer divided by two, and its mark will be undefined. The new buffer will be direct if, and only if, this buffer is direct, and it will be read-only if, and only if, this buffer is read-only.
Syntax :
public abstract CharBuffer asCharBuffer()
Return Value: This method returns a new char buffer.
Below are the examples to illustrate the asCharBuffer() method:
Example 1:
Java
import java.nio.*;
import java.util.*;
public class GFG {
public static void main(String[] args)
{
int capacity = 50 ;
try {
ByteBuffer bb = ByteBuffer.allocate(capacity);
bb.asCharBuffer().put( "TajMahal" );
char c;
System.out.print( "Char buffer : " );
while ((c = bb.getChar()) != 0 )
System.out.print(c + " " );
System.out.println();
}
catch (IllegalArgumentException e) {
System.out.println( "Exception thrown : " + e);
}
catch (ReadOnlyBufferException e) {
System.out.println( "Exception thrown : " + e);
}
}
}
|
Output:
Char buffer : T a j M a h a l
Example 2:
Java
import java.nio.*;
import java.util.*;
public class GFG {
public static void main(String[] args)
{
int capacity = 50 ;
try {
ByteBuffer bb = ByteBuffer.allocate(capacity);
CharBuffer cb = bb.asCharBuffer();
cb.put( "Tajmahal" );
cb.rewind();
char c;
System.out.print( "Char buffer : " );
while ((c = cb.get()) != 0 )
System.out.print(c + " " );
ByteBuffer bb1 = bb.asReadOnlyBuffer();
CharBuffer cb1 = bb1.asCharBuffer();
System.out.println( "\n\nTrying to put the string"
+ " into read only charbuffer" );
cb1.put( "Tajmahal" );
}
catch (IllegalArgumentException e) {
System.out.println( "Exception thrown : " + e);
}
catch (ReadOnlyBufferException e) {
System.out.println( "Exception thrown : " + e);
}
}
}
|
Output:
Char buffer : T a j m a h a l
Trying to put the string into read only charbuffer
Exception thrown : java.nio.ReadOnlyBufferException
Last Updated :
13 Jul, 2021
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