78 lines
2.9 KiB
Java
78 lines
2.9 KiB
Java
package test;
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import shape.Circle;
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import shape.Rectangle;
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import javax.swing.*;
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import java.awt.*;
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public class ShapeDrawerTest extends JFrame {
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/*******请在下面添加**************/
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// 【任务1】定义一个包含5个元素的圆形数组
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Circle[] circles = new Circle[5];
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Rectangle[] rectangles = new Rectangle[2];
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private shape.Shape[] shapes = new shape.Shape[4];
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/*******请在上面添加**************/
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// 初始化图形
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private void initShapes() {
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/*******请在下面添加**************/
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// 【任务2】采用无参构造添加一个红色，坐标为(100,100)，半径为50的圆形，并加入对应数组
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shapes[0] = new Circle();
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((Circle)shapes[0]).setX(100);
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((Circle)shapes[0]).setY(100);
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((Circle)shapes[0]).setRadius(50);
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((Circle)shapes[0]).setColor(Color.RED);
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// 【任务3】采用有参构造添加一个黄色，坐标为(150,300)，半径为70的圆形，并加入对应数组
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shapes[1] = new Circle(Color.YELLOW, 150, 300, 70);
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// 【任务4】采用无参构造添加一个绿色，坐标为(250,80)，宽为100，高为80的矩形，并加入对应数组
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shapes[2] = new Rectangle();
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((Rectangle)shapes[2]).setX(250);
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((Rectangle)shapes[2]).setY(80);
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((Rectangle)shapes[2]).setWidth(100);
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((Rectangle)shapes[2]).setHeight(80);
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((Rectangle)shapes[2]).setColor(Color.GREEN);
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// 【任务5】采用有参构造添加一个粉色，坐标为(300,300)，宽为120，高为60的矩形
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shapes[3] = new Rectangle(Color.PINK, 300, 300, 120, 60);
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// 【任务6】下移动第二个矩形50个单位
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((Rectangle)shapes[3]).setY(this.getY()-50);
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/*******请在上面添加**************/
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}
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// 重写绘制方法
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@Override
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public void paint(Graphics g) {
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super.paint(g);
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/*******请在下面添加**************/
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// 绘制所有图形
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// 【任务4】采用增强型for循环绘制所有图形
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for (shape.Shape shape : shapes) {
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shape.draw(g);
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if (shape instanceof Circle) {
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((Circle)shape).drawCenterMark(g);
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}
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if (shape instanceof Rectangle) {
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((Rectangle)shape).drawDiagonals(g);
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}
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}
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/*******请在上面添加**************/
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// 绘制标题
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g.setColor(Color.BLACK);
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g.drawString("Java继承图形绘制示例", 300, 50);
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}
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public ShapeDrawerTest() {
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// 初始化窗口
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setTitle("图形绘制程序");
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setSize(800, 600);
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setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
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setLocationRelativeTo(null);
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// 创建各种图形对象
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initShapes();
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}
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public static void main(String[] args) {
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new ShapeDrawerTest().setVisible(true);
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}
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}
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