Question

我正在为一个课堂上的项目制作一个平台游戏，并且需要在某些平台上跳过鸡角色。我有一个开始屏幕和一个按钮，当单击该按钮时，它会将帧更改为第一级。当我将鸡角色添加到框架以及背景图像时，我只能看到背景图像。我应该使用不同的布局还是我可以做的其他事情。这是我的代码：

import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.File;
import java.io.IOException;
import java.util.*;
import javax.imageio.ImageIO;
import javax.swing.*;

public class Main extends JFrame {
        public Main(){

            //Creates Chicken Character
            final JLabel chicken = new JLabel(" ");
            ImageIcon chick1 = new ImageIcon("chicken.gif");
            ImageIcon chick2 = new ImageIcon("chicken2.gif");
            chicken.setIcon(chick1);

            //Sets Chicken Location
            chicken.setLocation(1, 1);

            //Creates Title Image 
            JLabel title = new JLabel(" ");
            ImageIcon tl = new ImageIcon("title.gif");
            title.setIcon(tl);

            //Creates Start Image
            final JButton start = new JButton("");
            ImageIcon st = new ImageIcon("start.gif");
            start.setIcon(st);

            //Creates Options Image
            JButton options = new JButton("");
            ImageIcon opt = new ImageIcon("options.gif");
            options.setIcon(opt);
            options.setBackground(Color.BLACK);

            //Creates label for level 0 background image
            JLabel background = new JLabel(" ");
            ImageIcon back = new ImageIcon("level0.gif");
            background.setIcon(back);



            //Creates a panel for level 0
            final JPanel p5 = new JPanel();
            chicken.setLocation(1, 1);
            p5.add(background);

            //Create first frame for "Start" button
            final JPanel p1 = new JPanel();
            p1.setLayout(new GridLayout(1, 1));
            p1.add(start, BorderLayout.CENTER);

            //Create second panel for title label
            final JPanel p2 = new JPanel(new BorderLayout());
            p2.setLayout(new GridLayout(1, 3));
            p2.add(title, BorderLayout.WEST);

            //Create third panel for "Options" button
            final JPanel p3 = new JPanel(new BorderLayout());
            p3.setLayout(new GridLayout(1, 1));
            p3.add(options, BorderLayout.SOUTH);

            //Creates fourth panel to organize all other primary
            final JPanel p4 = new JPanel(new BorderLayout());
            p4.setLayout(new GridLayout(1, 3));
            p4.add(p1, BorderLayout.WEST);
            p4.add(p2, BorderLayout.CENTER);
            p4.add(p3, BorderLayout.EAST);


            //When button is clicked, it changes the level
            start.addActionListener(new ActionListener() {
                @Override
                public void actionPerformed(ActionEvent e) {
                    if(start.isEnabled()) {
                        remove(p4);
                        add(new ContentPanel());
                        add(chicken);
                        chicken.setLocation(100, 100);
                        setSize(1440, 500);
                        setLocale(null);
                        chicken.isOpaque();
                        validate();
                    }
                    else {
                        return;
                    }
                }
            });

            //Adds fourth panel to frame
            add(p4, BorderLayout.CENTER);
        }

        public static void main(String arg[]) {
            Main frame = new Main();

            //Finds screen size of monitor
            Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();

            //Creates the frame
            frame.setTitle("Cockadoodle Duty: Awakening");
            frame.setSize(screenSize);
            frame.setLocale(null); 
            frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
            frame.setVisible(true);
            String background = "#000000";
            frame.setBackground(Color.decode(background));
        }
    }

    class ContentPanel extends JPanel{
          Image bgimage = null;

          ContentPanel() {
            MediaTracker mt = new MediaTracker(this);
            bgimage = Toolkit.getDefaultToolkit().getImage("level0.gif");
            mt.addImage(bgimage, 0);
            try {
              mt.waitForAll();
            } catch (InterruptedException e){
              e.printStackTrace();
            }
          }

          protected void paintComponent(Graphics g){
            super.paintComponent(g);
            int imwidth = bgimage.getWidth(null);
            int imheight = bgimage.getHeight(null);
            g.drawImage(bgimage, 1, 1, null);
          }
        }

Answer 1

注意：自从我使用Graphics API

以来已经有一段时间了

快速回答：

您需要在paintComponent方法中绘制所有内容。您的绘图例程应检查所有游戏对象的状态并相应地绘制它们。现在，面板正在绘制背景图像 - 这就是它。添加您的鸡肉图像的方式与添加bgImage的方式相同。

还需要考虑更多事项：

如果您遇到屏幕闪烁，请查看Double Buffering。

不要压倒你，但你可能想要对游戏编码做一些轻松的阅读。大致了解如何编写游戏循环代码以及每次循环执行时会发生什么。

由于您使用的是OO语言，您也应该制作鸡类。

public class Chicken {

   private int x;
   private int y;
   private Image chickenSprtie;

   //add get / set for access

}

甚至是一般的超级类 - 带有int x，int y的Sprite。甚至是＆＃34; Drawable＆＃34;界面强制所有可绘制的游戏对象都有通用的方法....

我应该为这个项目使用什么布局（Java）

1 个答案: