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IntBuffer as ReadOnlyBuffer() method in Java
A read-only int buffer can be created using the contents of a buffer with the method asReadOnlyBuffer() in the class java.nio.IntBuffer. 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 { IntBuffer buffer = IntBuffer.allocate(5); buffer.put(8); buffer.put(1); buffer.put(3); buffer.put(7); buffer.put(5); buffer.rewind(); System.out.println("The Original IntBuffer is: " + Arrays.toString(buffer.array())); IntBuffer roBuffer = buffer.asReadOnlyBuffer(); System.out.println("The ReadOnlyBuffer IntBuffer 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 IntBuffer is: [8, 1, 3, 7, 5] The ReadOnlyBuffer IntBuffer is: 8 1 3 7 5
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