应用Rangle1定义子类正方形Square

定义矩形接口rect在接口中有计算面积area（）获取宽度getWidth（）获取高度getHeight（）获取矩形位置getLocation（）继承接口rect实现矩形类Rentangle编写应用Rangle1定义子类正方形Square

 

//定义矩形接口rect，interface rect {

    //在接口中有计算面积area（）、    public long area();

    //获取宽度getWidth（）、    public long getWidth();

    //获取高度getHeight（）、    public long getHeight();

    //获取矩形位置getLocation（）等的方法。    public String getLocation();

    public void setHeight(long height);

    public void setWidth(long width);

    public void setX(String x);

    public void setY(String y);}

//编写继承接口rect实现矩形类Rentangle。class Rentangle implements rect {

    private long height;    private long width;

    private String x;    private String y;

    public long getHeight() {        return this.height;    }

    public long getWidth() {        return this.width;    }

    public void setHeight(long height) {        this.height = height;    }

    public void setWidth(long width) {        this.width = width;    }

    public void setX(String x) {        this.x = x;    }

    public void setY(String y) {        this.y = y;    }

    public long area() {        return this.height*this.width;    }

    public String getLocation() {        return "" + this.x + "," + this.y + "";    }

}

//应用Rangle1类。public class UseRentangle {    public static void main(String[] args) {        rect Rangle1 = new Rentangle();        Rangle1.setHeight(100);        Rangle1.setWidth(200);        Rangle1.setX("10");        Rangle1.setY("20");        System.out.println(Rangle1.area());        System.out.println(Rangle1.getLocation());

        rect square = new Square();        square.setHeight(100);        square.setX("30");        square.setY("50");        System.out.println(square.area());        System.out.println(square.getLocation());    }}

//编写程序，通过继承Rangle1类定义子类正方形Square。至少编写方法覆盖area（），并实现之。class Square extends Rentangle {

    private long height;

    private String x;    private String y;

    public long getHeight() {        return this.height;    }

    public long getWidth() {        return this.height;    }

    public void setHeight(long height) {        this.height = height;    }

    public void setWidth(long height) {        this.height = height;    }

    public void setX(String x) {        this.x = x;    }

    public void setY(String y) {        this.y = y;    }

    public long area() {        return this.height*this.height;    }

    public String getLocation() {        return "" + this.x + "," + this.y + "";    }

}