ThisOperator5.java

public class Shape {
	private int length;
	private int width;
	private Shape(int length, int width) {
		// this constructs rectangle
		this.length = length;
		this.width = width;
	}
	private Shape(int length) {
		// Constructs the square
		// by invoking the another constructor
		this(length, length);
	}
}