意外错误

Question

我有一个学校项目要到周一才能开始，而且还要过6个星期或者更长时间才能交完。我们用java创建了一个程序，将我们想要的添加到数据库中，我选择了游戏(标题，风格，平台，价格，数量(字符串，组合框，组合框，双精度，整型))，我使用一个堆栈来添加所有的对象，但由于某些原因，我无法编译它，并且我一直收到非常奇怪的错误。我的错误和代码分别在下面。

nathan@ubuntu:~/Desktop/TAFE/Jeff (Java)/personalProject$ javac *.java
GameCombo.java:11: <identifier> expected
    gamesStack.push(new Game("[Halo: Reach]", 3, 1, 108.00, 2));
                   ^
GameCombo.java:11: illegal start of type
    gamesStack.push(new Game("[Halo: Reach]", 3, 1, 108.00, 2));
                    ^
GameCombo.java:11: ')' expected
    gamesStack.push(new Game("[Halo: Reach]", 3, 1, 108.00, 2));
                       ^
GameCombo.java:11: ';' expected
    gamesStack.push(new Game("[Halo: Reach]", 3, 1, 108.00, 2));
                            ^
GameCombo.java:11: illegal start of type
    gamesStack.push(new Game("[Halo: Reach]", 3, 1, 108.00, 2));
                             ^
GameCombo.java:11: <identifier> expected
    gamesStack.push(new Game("[Halo: Reach]", 3, 1, 108.00, 2));
                                            ^
GameCombo.java:11: ';' expected
    gamesStack.push(new Game("[Halo: Reach]", 3, 1, 108.00, 2));
                                             ^
GameCombo.java:11: illegal start of type
    gamesStack.push(new Game("[Halo: Reach]", 3, 1, 108.00, 2));
                                               ^
GameCombo.java:11: <identifier> expected
    gamesStack.push(new Game("[Halo: Reach]", 3, 1, 108.00, 2));
                                                ^
GameCombo.java:11: <identifier> expected
    gamesStack.push(new Game("[Halo: Reach]", 3, 1, 108.00, 2));
                                                   ^
GameCombo.java:11: illegal start of type
    gamesStack.push(new Game("[Halo: Reach]", 3, 1, 108.00, 2));
                                                          ^
GameCombo.java:11: <identifier> expected
    gamesStack.push(new Game("[Halo: Reach]", 3, 1, 108.00, 2));
                                                           ^
GameCombo.java:11: ';' expected
    gamesStack.push(new Game("[Halo: Reach]", 3, 1, 108.00, 2));
                                                             ^
GameCombo.java:11: illegal start of type
    gamesStack.push(new Game("[Halo: Reach]", 3, 1, 108.00, 2));
                                                              ^
GameCombo.java:11: <identifier> expected
    gamesStack.push(new Game("[Halo: Reach]", 3, 1, 108.00, 2));
                                                               ^
GameCombo.java:11: ';' expected
    gamesStack.push(new Game("[Halo: Reach]", 3, 1, 108.00, 2));
                                                                ^
16 errors

import javax.swing.*;
import java.awt.*;
import java.awt.event.*;

import java.io.*;
import java.util.*;

public class GameCombo extends JPanel {
  ArrayList<Game> gamesList = new ArrayList<Game>();
  Stack<Game> gamesStack = new Stack<Game>();
    gamesStack.push(new Game("[Halo: Reach]", 3, 1, 108.00, 2));
    //gamesList.add(new Game("[Halo: Reach]", 3, 1, 108.00, 2));
    //gamesList.add(new Game("[Dead Space]", "Xbox 360", "Horror", "$68.00", "1"));

  //String[] games = {"", "[Halo: Reach] Xbox 360; Action; $108.00; 2;", "[Dead Space] Xbox 360; Horror; $65.00; 1;"}; 
  private JComboBox _gameBox = new JComboBox(gamesStack);

    public GameCombo() {
      setLayout(new GridLayout(1,1,1,1));

        add(_gameBox);
    }
}

Answer 1

此调用：

gamesStack.push(new Game("[Halo: Reach]", 3, 1, 108.00, 2));

应该在一些方法中，既然你想在每个新的对象中这样做，因为它从你的代码中看起来是这样的，为什么不把它移到构造函数中：

public class GameCombo extends JPanel {
  ArrayList<Game> gamesList = new ArrayList<Game>();
  Stack<Game> gamesStack = new Stack<Game>();
  private JComboBox _gameBox;

    public GameCombo() {
         setLayout(new GridLayout(1,1,1,1));
         gamesStack.push(new Game("[Halo: Reach]", 3, 1, 108.00, 2));
         _gameBox = new JComboBox(gamesStack);
         add(_gameBox);
    }
}

Answer 2

您需要首先定义一个方法，然后在该方法中编写相关代码。我没有透露太多，因为这是一个家庭工作项目。尝试阅读更多关于java的类和方法的内容

Answer 3

您不能将代码直接放在类主体中，必须将其放入方法或构造函数中。