Rectangle Example

Setup these two files and try running the program(s).

File 1: What is the name of this file?

// No comments on purpose - Do you understand what is going on?

import java.awt.*;

public class MyRect1 
{

public static void main(String args[])
{
    MyRect2 testRect = new MyRect2();

    System.out.println("Using MyRect2 object.");
    testRect.printRect();
    testRect.x1 = 1;
    testRect.printRect();

    System.out.println("Calling MyRect2 main().");
    MyRect2.main(null);
}
}

File 2: What is the name of this file?

import java.awt.*;

public class MyRect2
{
int x1;
int y1;
int x2;
int y2;

public MyRect2()
{
    x1 = 0;
    y1 = 0;
    x2 = 0;
    y2 = 0;
}
public MyRect2(int x1, int y1, int x2, int y2)
{
    this.x1 = x1;
    this.y1 = y1;
    this.x2 = x2;
    this.y2 = y2;
}

public MyRect2(Point topLeft, Point bottomRight)
{
    x1 = topLeft.x;
    y1 = topLeft.y;
    x2 = bottomRight.x;
    y2 = bottomRight.y;
}

public MyRect2(Point topLeft, int width, int height)
{
    x1 = topLeft.x;
    y1 = topLeft.y;
    x2 = (x1 + width);
    y2 = (y1 + height);
}

void printRect()
{
    System.out.println("Draw rectangle: top left at " + x1 + ", " + y1 +
                " bottom right at "  + x2 + ", " + y2);
}

public static void main(String args[])
{
    MyRect2 rectangle;

    rectangle = new MyRect2(25, 25, 50, 50);
    rectangle.printRect();

    rectangle = new MyRect2(new Point(10, 75), new Point (200, 150));
    rectangle.printRect();

    rectangle = new MyRect2(new Point(50, 200), 100, 125);
    rectangle.printRect();
}
}