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DoubleBuffer asReadOnlyBuffer() method in Java
A read-only double buffer can be created using the contents of a buffer with the method asReadOnlyBuffer() in the class java.nio.DoubleBuffer. The new buffer cannot have any modifications as it is a read-only buffer. However, the capacity, positions, limits etc. of the new buffer are the same as the previous buffer.
A program that demonstrates this is given as follows −
Example
import java.nio.*;
import java.util.*;
public class Demo {
public static void main(String[] args) {
int n = 5;
try {
DoubleBuffer buffer = DoubleBuffer.allocate(5);
buffer.put(4.5D);
buffer.put(1.2D);
buffer.put(3.9D);
buffer.put(7.5D);
buffer.put(5.8D);
buffer.rewind();
System.out.println("The Original DoubleBuffer is: " + Arrays.toString(buffer.array()));
DoubleBuffer roBuffer = buffer.asReadOnlyBuffer();
System.out.println("The ReadOnlyBuffer DoubleBuffer is: ");
while (roBuffer.hasRemaining())
System.out.print(roBuffer.get() + " ");
} catch (IllegalArgumentException e) {
System.out.println("Error!!! IllegalArgumentException");
} catch (ReadOnlyBufferException e) {
System.out.println("Error!!! ReadOnlyBufferException");
}
}
}The output of the above program is as follows −
Output
The Original DoubleBuffer is: [4.5, 1.2, 3.9, 7.5, 5.8] The ReadOnlyBuffer DoubleBuffer is: 4.5 1.2 3.9 7.5 5.8
Updated on: 30-Jul-2019
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