FloatBuffer array() method in Java With Examples
Last Updated :
06 Dec, 2018
The array() method of java.nio.FloatBuffer Class is used to Return the float array that backs this buffer. Modifications to this buffer’s content will cause the returned array’s content to be modified, and vice versa. Invoke() the hasArray() method are used before invoking this method in order to ensure that this buffer has an accessible backing array
Syntax :
public final float[] array()
Return Value: This method returns the array that backs this buffer.
Throws: This method throws the ReadOnlyBufferException(If this buffer is backed by an array but is read-only)
Below program illustrates the array() 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();
float [] fbb = fb.array();
System.out.println( "FloatBuffer: "
+ Arrays.toString(fbb));
}
catch (IllegalArgumentException e) {
System.out.println( "IllegalArgumentException catched" );
}
catch (ReadOnlyBufferException e) {
System.out.println( "ReadOnlyBufferException catched" );
}
}
}
|
Output:
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)
{
int capacity1 = 10 ;
int capacity2 = 5 ;
try {
FloatBuffer fb = FloatBuffer.allocate(capacity1);
fb.put( 9 .56F);
fb.put( 2 , 7 .61F);
fb.put( 3 , 4 .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);
}
}
}
|
Output:
FloatBuffer fb: [9.56, 0.0, 7.61, 4.61, 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: 9.56, 0.0, 7.61, 4.61, 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
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