How to use the BufferInt asReadOnlyBuffer() method in Java

import java.nio.*;
import java.util.*;

public class main {
	public static void main(String[] args) throws Exception
	{	
		int cap1 = 5;
		
		int cap2 = 10;
		
		try {

			//create buf1
			IntBuffer buf = IntBuffer.allocate(cap1);

			//populate buf1
			buf.put(1,4);
			buf.put(3,2);
			buf.put(2,8);
			buf.rewind();

			// diplay the IntBuffer
			System.out.println("IntBuffer buf: "+ Arrays.toString(buf.array()));

			//create another IntBuffer
			IntBuffer buf2 = IntBuffer.allocate(cap2);

			// putting the value in ib1
			buf2.put(1,5);
			buf2.put(3,3);
			buf2.put(2,9);
			buf2.rewind();

			// display the IntBuffer
			System.out.println("\nIntBuffer ib1: "+ Arrays.toString(buf2.array()));

			//create a read-pnly copy of buf1
			IntBuffer readOnlybuf = buf.asReadOnlyBuffer();

			// display the read only IntBuffer
			System.out.print("\nReadOnlyBuffer IntBuffer: ");

			while (readOnlybuf.hasRemaining())
				System.out.print(readOnlybuf.get() + ", ");

			// try to change readOnlyib
			System.out.println("\n\nGet the read only buffer into an array for editing");

			int[] arr = readOnlybuf.array();
		}

		catch (IllegalArgumentException e) {
			System.out.println("IllegalArgumentException catched");
		}

		catch (ReadOnlyBufferException e) {
			System.out.println("Exception thrown: " + e);
		}
	}
}