Question

我正在尝试创建一个简单的2D游戏，而我还是编程新手。我的问题是我试图在不同的类中创建不同类型的矩形并将其添加到我的JFrame中。我试着将它们添加到JPanel中，但是我无法将矩形放置在给定的坐标上。播放器组件是可移动的，另一个将是播放器无法通过的坚固的墙（但是，暂时保持坚固的墙并不重要）。所以我的问题是，如何将路障组件和播放器组件添加到JFrame中，并且仍然能够为其提供位置。这是我的代码：

竞技场课：

import javax.swing.*;

public class Arena {
public static void main(String args[]){
    JFrame f = new JFrame();
    Player s = new Player();
    Barricade x = new Barricade();
    f.add(x);
    f.add(s);
    f.setVisible(true);
    f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    f.setSize(1000, 1028);
    f.setResizable(false);
}
}

播放器类：

import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;
import java.awt.geom.Rectangle2D;
import javax.swing.*;

public class Player extends JPanel implements ActionListener, KeyListener{
Timer t = new Timer(5, this);
int x = 0, y = 0;



public Player() {
    t.start();
    addKeyListener(this);
    setFocusable(true);
    setFocusTraversalKeysEnabled(false);
}
public void paintComponent(Graphics g) {
    super.paintComponent(g);
    Graphics2D g2 = (Graphics2D) g;
    g2.fill(new Rectangle2D.Double(x * 100, y * 100, 100, 100));
    }

public void actionPerformed(ActionEvent e) {
    repaint();

}
public void up() {

    if (y == 0) {
    } else {
        y += -1;
        x += 0;
    }

}
public void down() {
    if(y == 9){}
    else{
        y += 1;
        x += 0;}
}
public void left() {
    if(x == 0){}
    else{
        y += 0;
        x += -1;}
}
public void right() {
    if(x == 9){}
    else{
        y += 0;
        x += 1;}
}


public void keyPressed(KeyEvent e) {
    int code = e.getKeyCode();
    if (code == KeyEvent.VK_UP) {
        up();
    }
    if (code == KeyEvent.VK_DOWN) {
        down();
    }
    if (code == KeyEvent.VK_RIGHT) {
        right();
    }
    if (code == KeyEvent.VK_LEFT) {
        left();
    }
}
public void keyTyped(KeyEvent e) {}
public void keyReleased(KeyEvent e) { }


}

边界类：

import javax.swing.*;
import java.awt.*;
import java.awt.geom.Rectangle2D;

public class Barricade extends JComponent {
private int x;
private int y;



public void paintComponent(Graphics g) {
    super.paintComponent(g);
    Graphics2D g2 = (Graphics2D) g;
    g2.setColor(Color.GREEN);
    g2.fill(new Rectangle2D.Double(500, 500, 100, 100));
}

}

无法将多个图形组件添加到JFrame

0 个答案: