Overloading Constructors - Java Object Oriented Design

Java examples for Object Oriented Design:Constructor

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Description

Overloading Constructors

Demo Code

import java.awt.Point;

public class Main {
    int x1 = 0;/*from   w w  w  .  j  a va2s. c o m*/
    int y1 = 0;
    int x2 = 0;
    int y2 = 0;

    Main(int x1, int y1, int x2, int y2) {
        this.x1 = x1;
        this.y1 = y1;
        this.x2 = x2;
        this.y2 = y2;
    }

    Main(Point topLeft, Point bottomRight) {
        this(topLeft.x, topLeft.y, bottomRight.x,
            bottomRight.y);
    }

    Main(Point topLeft, int w, int h) {
        this(topLeft.x, topLeft.y, topLeft.x + w,
            topLeft.y + h);
    }

    void printBox() {
        System.out.print("Box: <" + x1 + ", " + y1);
        System.out.println(", " + x2 + ", " + y2 + ">");
    }

    public static void main(String[] arguments) {
        Main rect;

        System.out.println("Calling Box2 with coordinates "
            + "(25,25) and (50,50):");
        rect = new Main(25, 25, 50, 50);
        rect.printBox();

        System.out.println("\nCalling Box2 with points "
            + "(10,10) and (20,20):");
        rect= new Main(new Point(10, 10), new Point(20, 20));
        rect.printBox();

        System.out.println("\nCalling Box2 with 1 point "
            + "(10,10), width 50 and height 50:");
        rect = new Main(new Point(10, 10), 50, 50);
        rect.printBox();

    }
}

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