java - 如何将图片分配给java swing中的矩形类？

Question

我正在使用 java swing 开发游戏。我想为我的 hadaf1 和 h1 以及下面的代码中的球设置愤怒的小鸟图像(整个代码)。 正如您在代码中看到的，我使用 Rectangle 类来绘制 hadaf1 和 h1 矩形，并且因为我使用它们的名称来更改它们的 x 和 y 并移动它们，所以我没有使用 g.fillRect，因为我需要矩形具有名称。我进行了大量搜索以找到将图像分配给矩形的解决方案，但我发现的唯一方法是使用 setpaint() ，它应该与 g.fillRect 一起使用。您能提供一个将图像分配给 hadaf1 和 h1 矩形的解决方案吗？

   import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.geom.AffineTransform;
import java.awt.geom.Point2D;
import java.awt.image.BufferedImage;

public class ProjectileShooterTest
{

    public static void main(String[] args)
    {
        SwingUtilities.invokeLater(new Runnable()
        {
            @Override
            public void run()
            {
                createAndShowGUI();
            }
        });
    }

    private static void createAndShowGUI()
    {
        JFrame f = new JFrame();
        f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        f.setSize(600,600);

        final ProjectileShooter projectileShooter =
                new ProjectileShooter();
        ProjectileShooterPanel projectileShooterPanel =
                new ProjectileShooterPanel(projectileShooter);
        projectileShooter.setPaintingComponent(projectileShooterPanel);

        JPanel controlPanel = new JPanel(new GridLayout(1,0));

        controlPanel.add(new JLabel("Angle"));
        final JSlider angleSlider = new JSlider(0, 90, 45);
        controlPanel.add(angleSlider);

        controlPanel.add(new JLabel("Power"));
        final JSlider powerSlider = new JSlider(0, 100, 50);
        controlPanel.add(powerSlider);

        JButton shootButton = new JButton("Shoot");
        shootButton.addActionListener(new ActionListener()
        {
            @Override
            public void actionPerformed(ActionEvent e)
            {
                int angleDeg = angleSlider.getValue();
                int power = powerSlider.getValue();
                projectileShooter.setAngle(Math.toRadians(angleDeg));
                projectileShooter.setPower(power);
                projectileShooter.shoot();
            }
        });
        controlPanel.add(shootButton);

        f.getContentPane().setLayout(new BorderLayout());
        f.getContentPane().add(controlPanel, BorderLayout.NORTH);
        f.getContentPane().add(projectileShooterPanel, BorderLayout.CENTER);
        f.setVisible(true);
    }
}

class ProjectileShooter
{
    private double angleRad = Math.toRadians(45);
    private double power = 50;
    private Projectile projectile;
    private JComponent paintingComponent;

    void setPaintingComponent(JComponent paintingComponent)
    {
        this.paintingComponent = paintingComponent;
    }

    void setAngle(double angleRad)
    {
        this.angleRad = angleRad;
    }

    void setPower(double power)
    {
        this.power = power;
    }
    int i=0;
    void shoot()
    {

        Thread t = new Thread(new Runnable()
        {
            @Override
            public void run()
            {


                  if(i<10)
                  {
                      i=i+1;
                executeShot();
                  }

                if(i==10)
                {
                    msg.infoBox("you lost","target score=20");
                    System.exit(0);
                }
            }
        });
        t.setDaemon(true);
        t.start();
    }

    private void executeShot()
    {
        if (projectile != null)
        {
            return;
        }
        projectile = new Projectile();

        Point2D velocity =
                AffineTransform.getRotateInstance(angleRad).
                        transform(new Point2D.Double(1,0), null);
        velocity.setLocation(
                velocity.getX() * power * 0.5,
                velocity.getY() * power * 0.5);
        projectile.setVelocity(velocity);



        long prevTime = System.nanoTime();
        while (projectile.getPosition().getY() >= 0)
        {
            long currentTime = System.nanoTime();
            double dt = 3 * (currentTime - prevTime) / 1e8;
            projectile.performTimeStep(dt);

            prevTime = currentTime;
            paintingComponent.repaint();
            try
            {
                Thread.sleep(10);
            }
            catch (InterruptedException e)
            {
                Thread.currentThread().interrupt();
                return;
            }
        }

        projectile = null;
        paintingComponent.repaint();
    }

    Projectile getProjectile()
    {
        return projectile;
    }
}

class Projectile
{
    private final Point2D ACCELERATION = new Point2D.Double(0, -9.81 * 0.1);

    private final Point2D position = new Point2D.Double();
    private final Point2D velocity = new Point2D.Double();

    public Point2D getPosition()
    {
        return new Point2D.Double(position.getX(), position.getY());
    }
    public void setPosition(Point2D point)
    {
        position.setLocation(point);
    }

    public void setVelocity(Point2D point)
    {
        velocity.setLocation(point);
    }

    void performTimeStep(double dt)
    {
        scaleAddAssign(velocity, dt, ACCELERATION);
        scaleAddAssign(position, dt, velocity);

        System.out.println("Now at "+position+" with "+velocity);


    }


    private static void scaleAddAssign(
            Point2D result, double factor, Point2D addend)
    {
        double x = result.getX() + factor * addend.getX();
        double y = result.getY() + factor * addend.getY();
        result.setLocation(x, y);
    }

}

class ProjectileShooterPanel extends JPanel
{
    boolean check1 = false;
    boolean check2=false;
    int x3=0;
    int x1=0; int x2=420;
    int score=0;
    boolean hit1=false;
    boolean hit2=false;

    private TexturePaint paint;




    private final ProjectileShooter projectileShooter;

    public void TexturePanel(BufferedImage bi) {

        this.paint = new TexturePaint(bi, new Rectangle(0, 0, bi.getWidth(), bi.getHeight()));
    }

    public ProjectileShooterPanel(ProjectileShooter projectileShooter)
    {
        this.projectileShooter = projectileShooter;
    }



    @Override
    protected void paintComponent(Graphics gr)
    {
        super.paintComponent(gr);
        Graphics2D g = (Graphics2D)gr;

        Projectile projectile = projectileShooter.getProjectile();

         int x,y;
           Rectangle hadaf1=  new Rectangle(x3+400,450,50,50);
        g.draw(hadaf1);
        Rectangle hadaf2=  new Rectangle(400+x1,x2,30,30);
        g.draw(hadaf2);

        Rectangle h1=  new Rectangle(350,480,20,20);

        g.draw(h1);

        if (projectile != null)
        {
            g.setColor(Color.RED);
            Point2D position = projectile.getPosition();
             x = (int)position.getX();
             y = getHeight() - (int)position.getY();
            g.fillOval(x-01, y-10, 20, 20);

            if((projectile.getPosition().getX()>h1.getX() && projectile.getPosition().getX()<h1.getX()+30) && (projectile.getPosition().getY()>0 && projectile.getPosition().getY()<25) )
            {    System.out.println("barkhooooooord");
                System.out.println(projectile.getPosition().getY());
                if(hit1==false)
                {
                    hit1=true;
                    score=score+10;
                }
            }

        if((projectile.getPosition().getX()>hadaf1.getX() && projectile.getPosition().getX()<hadaf1.getX()+50) && (projectile.getPosition().getY()>hadaf1.getY()-500 && projectile.getPosition().getY()<hadaf1.getY()-450))
        {
            System.out.println("paeen collision at");
            System.out.println(projectile.getPosition().getX()+x3);
            System.out.println(projectile.getPosition().getY());
            check1=true;
        }

         if(projectile.getPosition().getX()>hadaf2.getX() && projectile.getPosition().getX()<hadaf2.getX()+30 )
         {
             if(x2==420)
             {
                 if(projectile.getPosition().getY()>hadaf1.getY()-450 && projectile.getPosition().getY()<100)
                 {
                     System.out.println("bala collision at");  check2=true;
                     System.out.println(projectile.getPosition().getX()+x1);
                     System.out.println(projectile.getPosition().getY());

                 }
             }
         }

            }

            if(check1==true){

                x3=x3+1;

                check2=true;
                check1=false;

            }
             if(check2==true)
             {
            x1=x1+1;

                 check2=false;
             }

            if(hadaf1.getX()!=hadaf2.getX())
            {

                if(hadaf1.getX()-hadaf2.getX()<-50)
                {

                    x2=470;
                    if(hit2==false)
                    {
                     hit2=true;
                        score=score+10;
                    }

                }

            }

     if(hit1==hit2==true && score==20)
        {
            msg.infoBox("you won","score=20");
            System.exit(0);
        }


        }

    }

Answer 1

我将您的代码复制到我的 Eclipse 中。尽管缺少 msg 定义，它仍会运行。我刚刚把它注释掉了。

我需要几个小时才能理顺你的代码。正如 MadProgrammer 所说，您在 PaintComponent 方法中做了太多事情。 PaintComponent 方法应该进行绘制。时期。句号。没有别的了。

为了回答标题中的问题，您创建一个包含图像和矩形的 Java 对象。

package com.ggl.testing;

import java.awt.Image;
import java.awt.Rectangle;

public class ImageRectangle {

    private final Image image;

    private Rectangle rectangle;

    public ImageRectangle(Image image, Rectangle rectangle) {
        this.image = image;
        this.rectangle = rectangle;
    }

    public Rectangle getRectangle() {
        return rectangle;
    }

    public void setRectangle(Rectangle rectangle) {
        this.rectangle = rectangle;
    }

    public Image getImage() {
        return image;
    }

}