java新人問題，下面的代碼為什么不能運行-有解無憂

package 用戶輸入與埠輸出;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class 計算機 {
public static void main(String[] args)
{

class 計算器 extends JPanel
{
private JButton dis;
    private JPanel panel;
    private double result;
    private String lastCommand;
    private boolean start;
    public  計算器()
    {
     this.setLayout(new BorderLayout());
     result=0;
     lastCommand="=";
     start=true;
     dis=new JButton("0");
     dis.setEnabled(false);
     dis.add(dis, BorderLayout.NORTH);

     ActionListener insert=new InsertAction();
     ActionListener command=new CommandAction();

     panel=new JPanel();
     panel.setLayout(new GridLayout(4,4));

     addButton("7",insert);
     addButton("8",insert);
     addButton("9",insert);
     addButton("/",command);

     addButton("4",insert);
     addButton("5",insert);
     addButton("6",insert);
     addButton("-",command);

     addButton("1",insert);
     addButton("2",insert);
     addButton("3",insert);
     addButton("*",command);

     addButton("0",insert);
     addButton(".",insert);
     addButton("=",command);
     addButton("+",command);

     add(panel,BorderLayout.CENTER);

    }
    public void addButton(String number,ActionListener listener)
    {
     JButton Button=new JButton("number");
     Button.addActionListener(listener);
     panel.add(Button);
    }

    class InsertAction implements ActionListener
    {
     public void actionPerformed(ActionEvent event)
     {
     String Input=event.getActionCommand();
     if(start)
     {
     dis.setText("");
     start=false;
     }
     dis.setText(dis.getText()+Input);
     }
    }

    class CommandAction implements ActionListener
    {
    public void actionPerformed(ActionEvent event)
    {
     String command=event.getActionCommand();
      if(start) {
       if(command.equals("-")) {
       dis.setText(command);
       start=false;
       }
       else lastCommand=command;
      }   else {
       計算機(Double.parseDouble(dis.getText()));
       lastCommand=command;
       start=true;
      }
    }
}
    public void 計算機(double x)
    {
     if(lastCommand.equals("+"))result+=x;
     else if(lastCommand.equals("-"))result-=x;
     else if(lastCommand.equals("*"))result*=x;
     else if(lastCommand.equals("/"))result/=x;
     else if(lastCommand.equals("="))result=x;
     dis.setText(""+result);

    }
}


}}

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報什么錯誤把中文換成英文試試

uj5u.com熱心網友回復：

參考 1 樓 usecf的回復:

報什么錯誤把中文換成英文試試

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