Question

我应该创建一个bullseye.jar文件。我有几个不同的问题。

我在牛眼里的圈子都需要它们的边界，但它们并没有出现。我认为g2.draw会照顾到这一点，但没有骰子。
当我运行程序并将框架拖得更小时，靶心尺寸也会缩小。但我必须确保较小的圆圈不会消失（当牛眼缩小时它们正在做的事情。）

我有两节课。第一个是组件类，第二个是主要的。

/**
 *
 * @author joe
 */
import java.awt.*;
import java.awt.geom.*;
import javax.swing.JComponent;

public class BullseyeComponent extends JComponent{

    int count = 0;

    @Override

    public void paintComponent(Graphics g){

        Graphics2D g2 = (Graphics2D) g;
        //make circle fill screen
        int radius = Math.min(this.getHeight(),this.getWidth()) / 2;


        g2.draw(new Circle(this.getWidth()/ 2, this.getHeight() / 2, radius ));
        g2.setColor(Color.WHITE);
        g2.fill(new Circle(this.getWidth()/ 2, this.getHeight() / 2, radius));


        g2.draw(new Circle(this.getWidth()/ 2 , this.getHeight() / 2, radius - 25 ));
        g2.setColor(Color.WHITE);
        g2.fill(new Circle(this.getWidth()/ 2 , this.getHeight() / 2 , radius - 25));


        g2.draw(new Circle(this.getWidth()/ 2 , this.getHeight() / 2, radius - 50 ));
        g2.setColor(Color.BLACK);
        g2.fill(new Circle(this.getWidth()/ 2 , this.getHeight() / 2 , radius - 50));


        g2.draw(new Circle(this.getWidth()/ 2 , this.getHeight() / 2, radius - 75 ));
        g2.setColor(Color.BLACK);
        g2.fill(new Circle(this.getWidth()/ 2 , this.getHeight() / 2 , radius - 75));

        g2.draw(new Circle(this.getWidth()/ 2 , this.getHeight() / 2, radius - 100 ));
        g2.setColor(Color.CYAN);
        g2.fill(new Circle(this.getWidth()/ 2 , this.getHeight() / 2 , radius - 100));


        g2.draw(new Circle(this.getWidth()/ 2 , this.getHeight() / 2, radius - 125 ));
        g2.setColor(Color.CYAN);
        g2.fill(new Circle(this.getWidth()/ 2 , this.getHeight() / 2 , radius - 125));

        g2.draw(new Circle(this.getWidth()/ 2 , this.getHeight() / 2, radius - 150 ));
        g2.setColor(Color.RED);
        g2.fill(new Circle(this.getWidth()/ 2 , this.getHeight() / 2 , radius - 150));


        g2.draw(new Circle(this.getWidth()/ 2 , this.getHeight() / 2, radius - 175 ));
        g2.setColor(Color.RED);
        g2.fill(new Circle(this.getWidth()/ 2 , this.getHeight() / 2 , radius - 175));

        g2.draw(new Circle(this.getWidth()/ 2 , this.getHeight() / 2, radius - 200 ));
        g2.setColor(Color.YELLOW);
        g2.fill(new Circle(this.getWidth()/ 2 , this.getHeight() / 2 , radius - 200));


        g2.draw(new Circle(this.getWidth()/ 2 , this.getHeight() / 2, radius - 225 ));
        g2.setColor(Color.YELLOW);
        g2.fill(new Circle(this.getWidth()/ 2 , this.getHeight() / 2 , radius - 225));

    }
}

class Circle extends Ellipse2D.Double {

    public Circle(double x, double y, double radius) {
        super(x - radius, y - radius, 2 * radius, 2 * radius);
    }
}

/**
 *
 * @author joe
 */

import javax.swing.*;

public class BullseyeViewer {

    public static void main(String[] args) {
        JFrame frame = new JFrame();
        frame.setSize(500, 550);
        frame.setTitle("Bullseye");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        BullseyeComponent component = new BullseyeComponent();
        frame.add(component);

        frame.setLocationRelativeTo(null);
        frame.setVisible(true);
    }
}

Answer 1

修复1

你现在的绘画方式，

g2.draw(new Circle(this.getWidth()/ 2, this.getHeight() / 2, radius ));
g2.setColor(Color.WHITE);
g2.fill(new Circle(this.getWidth()/ 2, this.getHeight() / 2, radius));

会覆盖边框（draw之前的fill）。替换为

g2.fill(new Circle(this.getWidth()/ 2, this.getHeight() / 2, radius));
g2.setColor(Color.WHITE);
g2.draw(new Circle(this.getWidth()/ 2, this.getHeight() / 2, radius ));

更改颜色（边框应该有不同的颜色，否则它们会以适当的方式与外圈合并）。

修复2

您正在对半径差异进行硬编码。即使你施加了很多黑客攻击，这也会使内圈消失。

所以要修复它，你必须相应地缩放半径。

g2.fill(new Circle(this.getWidth()/ 2, this.getHeight() / 2, radius * 0.8));
g2.setColor(Color.WHITE);
g2.draw(new Circle(this.getWidth()/ 2, this.getHeight() / 2, radius * 0.8));

将所有半径定义为外半径的百分比，你应该好好去。

希望这有帮助。
祝你好运。

收缩JFrame导致图纸消失; Bullseye边界没有出现

1 个答案:

修复1

修复2