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Use of isReadOnly() method in java.
Posted on: August 5, 2010 at 12:00 AM
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In this tutorial, you will see the use of isReadOnly() method in java.

Use of isReadOnly() method in java.

In this tutorial, we will see how to use of isReadOnly method in java.

IntBuffer API :

The java.nio.IntBuffer class extends java.nio.Buffer class. It provides the following methods:

Return type Method Description
static IntBuffer allocate( int capacity)  The allocate(..) method allocate a new int buffer.
abstract IntBuffer asReadOnlyBuffer() The asReadOnlyBuffer() method create a new read-only buffer that share the content of given int buffer.

Buffer API:

The java.nio.Buffer class extends java.lang.Object class. It provides the following methods:

Code

Return type Method Description
boolean isReadOnly() The isReadOnly() method tells this buffer is read-only or not.
Int remaining() The remaining() method returns remaining element in buffer.
import java.nio.*;
import java.nio.IntBuffer;

public class BufferIsReadOnly {
  public static void main(String[] args) {
    IntBuffer intBuf = IntBuffer.allocate(24);
    intBuf.put(2);
    intBuf.flip();
    System.out.println("Content in int buffer.");
    while (intBuf.hasRemaining()) {
      System.out.println(intBuf.get());
    }
    if (intBuf.isReadOnly()) {
      System.out.println("Buffer is read only.");
    else {
System.out.println("Buffer is not read only.");
    }
IntBuffer readIntBuffer = intBuf.asReadOnlyBuffer();
    readIntBuffer.flip();
 System.out.println("Content in readonly buffer.");
    while (readIntBuffer.hasRemaining()) {
      System.out.println(readIntBuffer.get());
    }
    if (readIntBuffer.isReadOnly()) {
      System.out.println("Buffer is read only.");
    else {
System.out.println("Buffer is not read only.");
    }
  }
}

Output

C:\r>java BufferIsReadOnly
Content in int buffer.
2
Buffer is not read only.
Content in readonly buffer.
2
Buffer is read only.

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Posted on: August 5, 2010

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