令牌上的语法错误，请删除这些令牌

  • Z时代
  • 2024-01-10
  • 分类：问答

这是我的代码一直在给问题。

package ca.rhinoza.game;
import java.awt.BorderLayout;
import java.awt.Canvas;
import java.awt.Dimension;
import javax.swing.JFrame;
public boolean running = false;
public class Game extends Canvas implements Runnable {
    private static final long serialVersionUID = 1L;
    public static final int WIDTH = 160;
    public static final int HEIGHT = WIDTH / 12 * 9;
    public static final int SCALE = 3;
    public static final String NAME = "Game";
    private JFrame frame;
    public Game(){
        setMinimumSize(new Dimension(WIDTH*SCALE, HEIGHT*SCALE));
        setMaximumSize(new Dimension(WIDTH*SCALE, HEIGHT*SCALE));
        setPreferredSize(new Dimension(WIDTH*SCALE, HEIGHT*SCALE));
        frame = new JFrame(NAME);
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setLayout(new BorderLayout());
        frame.add(this, BorderLayout.CENTER);
        frame.pack();
        frame.setResizable(false);
        frame.setLocationRelativeTo(null);
        frame.setVisible(true);
    }
    public synchronized void start(){
        new Thread(this).start();
    }
    public synchronized void stop(){
    }
    public void run() {
    }
    public static void main(String[] args){
        new Game().start();
    }
}

我不知道为什么要这么做。

我已根据您的要求进行了编辑，以查看更多代码。

回答：

您要在课程外声明一个字段：

import java.awt.BorderLayout;
import java.awt.Canvas;
import java.awt.Dimension;
import javax.swing.JFrame;
public boolean running = false; /// <=============== invalid location
public class Game extends Canvas implements Runnable { // <==== class starts here
    private static final long serialVersionUID = 1L;
    public static final int WIDTH = 160;
    public static final int HEIGHT = WIDTH / 12 * 9;
    public static final int SCALE = 3;
    public static final String NAME = "Game";
    ...

它必须放在一个类中：

import java.awt.BorderLayout;
import java.awt.Canvas;
import java.awt.Dimension;
import javax.swing.JFrame;
public class Game extends Canvas implements Runnable { // <==== class starts here
    public boolean running = false; /// <=============== valid location
    private static final long serialVersionUID = 1L;
    public static final int WIDTH = 160;
    public static final int HEIGHT = WIDTH / 12 * 9;
    public static final int SCALE = 3;
    public static final String NAME = "Game";
    ...

以上是 令牌上的语法错误，请删除这些令牌 的全部内容， 来源链接： utcz.com/qa/423877.html

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