FloatBuffer asReadOnlyBuffer() method in Java with Examples
The asReadOnlyBuffer() method of java.nio.FloatBuffer Class is used to create a new, read-only float buffer with this buffer’s content. The new buffer is a replica of this buffer. Hence changes made to this buffer’s content will be visible in the new buffer.
Since the new buffer is read-only, therefore any modification to its content won’t be allowed. The two buffers’ position, limit, and mark values will be independent. The new buffer’s capacity, limit, position, and mark values will be identical to those of this buffer. If this buffer is itself read-only then this method behaves in exactly the same way as the duplicate method.
Syntax :
public abstract FloatBuffer asReadOnlyBuffer()
Return Value: This method returns the new, read-only float buffer with the same content as that of this buffer.
Below are the examples to illustrate the asReadOnlyBuffer() method:
Examples 1:
import java.nio.*;
import java.util.*;
public class GFG {
public static void main(String[] args)
{
int capacity = 10 ;
try {
FloatBuffer fb = FloatBuffer.allocate(capacity);
fb.put( 8 .56F);
fb.put( 2 , 9 .61F);
fb.rewind();
System.out.println( "Original FloatBuffer: "
+ Arrays.toString(fb.array()));
FloatBuffer floatBuffer = fb.asReadOnlyBuffer();
System.out.print( "\nReadOnlyBuffer FloatBuffer: " );
while (floatBuffer.hasRemaining())
System.out.print(floatBuffer.get() + ", " );
}
catch (IllegalArgumentException e) {
System.out.println( "IllegalArgumentException catched" );
}
catch (ReadOnlyBufferException e) {
System.out.println( "ReadOnlyBufferException catched" );
}
}
}
|
Output:
Original FloatBuffer: [8.56, 0.0, 9.61, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0]
ReadOnlyBuffer FloatBuffer: 8.56, 0.0, 9.61, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0,
Examples 2:
import java.nio.*;
import java.util.*;
public class GFG {
public static void main(String[] args) throws Exception
{
int capacity1 = 10 ;
int capacity2 = 5 ;
try {
FloatBuffer fb = FloatBuffer.allocate(capacity1);
fb.put( 8 .56F);
fb.put( 2 , 9 .61F);
fb.rewind();
System.out.println( "FloatBuffer fb: "
+ Arrays.toString(fb.array()));
FloatBuffer fb1 = FloatBuffer.allocate(capacity2);
fb1.put( 1 , 4 .56F);
fb1.put( 2 , 6 .45F);
fb1.rewind();
System.out.println( "\nFloatBuffer fb1: "
+ Arrays.toString(fb1.array()));
FloatBuffer readOnlyFb = fb.asReadOnlyBuffer();
System.out.print( "\nReadOnlyBuffer FloatBuffer: " );
while (readOnlyFb.hasRemaining())
System.out.print(readOnlyFb.get() + ", " );
System.out.println( "\n\nTrying to get the array"
+ " from ReadOnlyFb for editing" );
float [] fbarr = readOnlyFb.array();
}
catch (IllegalArgumentException e) {
System.out.println( "IllegalArgumentException catched" );
}
catch (ReadOnlyBufferException e) {
System.out.println( "Exception thrown: " + e);
}
}
}
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Output:
FloatBuffer fb: [8.56, 0.0, 9.61, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0]
FloatBuffer fb1: [0.0, 4.56, 6.45, 0.0, 0.0]
ReadOnlyBuffer FloatBuffer: 8.56, 0.0, 9.61, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0,
Trying to get the array from ReadOnlyFb for editing
Exception thrown: java.nio.ReadOnlyBufferException
Last Updated :
06 Dec, 2018
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