我需要使用中心，高X轴和宽Y轴坐标创建矩形的构造函数

问题描述

所以我的代码包括3部分2类和测试。 这是测试代码

@Test
    public void testRectangle1() {
        Point center = new Point(20,30);
        Rectangle rect = new Rectangle(center,20,20);
        assertAll(
                () -> assertEquals(10,rect.getTopLeft().getX()),() -> assertEquals(20,rect.getTopLeft().getY()),() -> assertEquals(30,rect.getBottomright().getX()),() -> assertEquals(40,rect.getBottomright().getY()),rect.getWidth()),rect.getHeight())
        );
    }

Class Point可以正常工作，我只是为了清楚起见对它进行了

public class Point {

    private int x,y;

    public Point(int x,int y) {
        this.x = x;
        this.y = y;
    }

    public Point() {
        this(0,0);
    }

    public int getX() {
        return x;
    }

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

    public int getY() {
        return y;
    }

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

    public void moveto(int newX,int newY) {
        x = newX;
        y = newY;
    }

    public void moveRel(int dx,int dy) {
        x += dx;
        y += dy;
    }

    @Override
    public int hashCode() {
        final int prime = 31;
        int result = 1;
        result = prime * result + x;
        result = prime * result + y;
        return result;
    }

    @Override
    public boolean equals(Object obj) {
        if (this == obj)
            return true;
        if (obj == null)
            return false;
        if (getClass() != obj.getClass())
            return false;
        Point other = (Point) obj;
        if (x != other.x)
            return false;
        if (y != other.y)
            return false;
        return true;
    }
}

这是Rectangle本身的类，它同时包含构造函数和附加方法。

public class Rectangle {
    public int width = 0;
    public int height = 0;
    public Point center;

    public Rectangle(Point center,int width,int height) {
        int x = 0;
        int y = 0;
        width=x;
        height=y;
    }

    public Point getTopLeft() {
        Point point = new Point(center.getX(),center.getY());
        point.moveRel(- width / 2,height / 2);
        return point;
    }

    public Point getBottomright() {
        Point point = new Point(center.getX(),center.getY());
        point.moveRel(width / 2,- height / 2);
        return point;
    }

    public int getWidth() {

        return width;
    }


    public int getHeight() {

        return height;
    }
}

主要问题是该代码在测试中仅返回零，我猜问题出在构造函数或附加方法的矩形类中。

解决方法

您的Rectangle构造函数始终将width和height设置为0。我认为该构造函数应该看起来像...

public Rectangle(Point center,int width,int height) {
    int x = 0;
    int y = 0;
    this.width=width;
    this.height=height;
    this.center=center;
}