/** * Write a description of class Example19_7 here. *  * @author (your name)  * @version (a version number or a date) */public class Example19_7{	// instance variables - replace the example below with your own	private int x;	/**	 * Constructor for objects of class Example19_7	 */	public Example19_7()	{		// initialise instance variables		x = 0;	}	/**	 * An example of a method - replace this comment with your own	 * 	 * @param  y   a sample parameter for a method	 * @return     the sum of x and y 	 */	public int sampleMethod(int y)	{		// put your code here		return x + y;	}}