import java.awt.Rectangle;

public class ObjectVarsAsParameters
{	public static void main(String[] args)
	{	go();
	}

	public static void go()
	{	Rectangle r1 = new Rectangle(0,0,5,5);
		System.out.println("In method go. r1 " + r1 + "\n");
		// could have been
		//System.out.prinltn("r1" + r1.toString());
		r1.setSize(10, 15);
		System.out.println("In method go. r1 " + r1 + "\n");
		alterPointee(r1);
		System.out.println("In method go. r1 " + r1 + "\n");

		alterPointer(r1);
		System.out.println("In method go. r1 " + r1 + "\n");
	}

	public static void alterPointee(Rectangle r)
	{	System.out.println("In method alterPointee. r " + r + "\n");
		r.setSize(20, 30);
		System.out.println("In method alterPointee. r " + r + "\n");
	}

	public static void alterPointer(Rectangle r)
	{	System.out.println("In method alterPointer. r " + r + "\n");
		r = new Rectangle(5, 10, 30, 35);
		System.out.println("In method alterPointer. r " + r + "\n");
	}

}

// From https://www.cs.utexas.edu/~scottm/cs307/javacode/codeSamples/ObjectVarsAsParameters.java