/*
 * MyInteger - an integer wrapper, designed for
 * use with the Testable interface.
 */
public class MyInteger implements Testable {
	int data;
	
	public MyInteger( int d ) { data = d; }
	
	public String toString( ) { return String.valueOf( data ); }
	
	public boolean isLessThan( Object x ) {
		MyInteger m = (MyInteger) x;	// cast x to MyInteger
		return ( data < m.data );
	}

	/* Here are some failed attempts at defining isLessThan() */

	/* 
	 * The following fails because x is not of type MyInteger, so
	 * we cannot access the data instance variable.
	 */
/*	public boolean isLessThan( Object x ) {
		return ( data < x.data );
	}
*/
	/*
	 * The following fails because it fails to implement the
	 * isLessThan() interface, which requires an Object as its 
	 * argument.
	 */
/*	public boolean isLessThan( MyInteger m ) {
		return ( data < m.data );
	}
*/
}