用ECLIPSE软件实现JAVA的计算器编程

补充：要运用程序

答案：import java.awt.*;
import java.awt.event.*;
import javax.swing.*; public class app_1
{
      public static void main(String[] args)
      {
         CalculatorFrame frame=new CalculatorFrame();
         frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
         frame.setVisible(true);
      }
} class CalculatorFrame extends JFrame
{
    public CalculatorFrame()
    {
       setTitle("Calculator");
       CalculatorPanel panel=new CalculatorPanel();
       add(panel);
       pack();
    }
} class CalculatorPanel extends Panel
{
    public CalculatorPanel()
    {
       setLayout(new BorderLayout());        result=0;
       lastCommand="=";
       start=true;
       flag=true;        display=new JButton("0");
       display.setEnabled(false);
       add(display,BorderLayout.NORTH);        ActionListener insert=new InsertAction();
       ActionListener command=new CommandAction();        panel=new JPanel();
       panel.setLayout(new GridLayout(5,5));        addButton("",insert);
       addButton("",insert);
       addButton("Backspace",command);
       addButton("CE",command);
       addButton("C",insert);
       
       addButton("7",insert);
       addButton("8",insert);
       addButton("9",insert);
       addButton("/",command);
       addButton("sqrt",command);
      // addButton("CE",command);        addButton("4",insert);
       addButton("5",insert);
       addButton("6",insert);
       addButton("*",command);
       addButton("%",insert);
      // addButton("Backspace",command);        addButton("1",insert);
       addButton("2",insert);
       addButton("3",insert);
       addButton("-",command);
       addButton("1/x",command);
       //addButton("sqrt",command);        addButton("0",insert);
       addButton("+/-",insert);
       addButton(".",command);
       addButton("+",command);
       addButton("=",command);        add(panel,BorderLayout.CENTER);
    }
    private void addButton(String label,ActionListener listener)
    {
       JButton button=new JButton(label);
       button.addActionListener(listener);
       panel.add(button);
    }
    private class InsertAction implements ActionListener
    {
       public void actionPerformed(ActionEvent event)
       {
          String input=event.getActionCommand();
          if(start&&flag)
          {
             display.setText("");
             start=false;
          }
          if(flag)
          display.setText(display.getText()+input);
       }
    }
    private class CommandAction implements ActionListener
    {
        public void actionPerformed(ActionEvent event)
        {
        String command=event.getActionCommand();   if(command.equals("CE"))
  {
            display.setText("0");
            start=true;
            flag=true;
            command="=";
     }
        else
        if(start&&flag)
        {
           if(command.equals("-"))
           {
              display.setText(command);
              start=false;
           }
           else
           if((command.equals("1/x")||command.equals("sqrt"))&&flag)
              calculate(Double.parseDouble(display.getText()),command);
           else
             if(flag)
                lastCommand=command;
        }
        else
        {
   if(command.equals("Backspace")&&flag)
   {
    String s=display.getText();
    char[] s1=s.toCharArray();
    if(s.length()>=2)
    {
     String s2=new String(s1,0,s.length()-1);
     display.setText(s2);
    }
    else
    {
        display.setText("0");
        start=true;
       }              }
             else  if(flag)
             {
                calculate(Double.parseDouble(display.getText()),command);                   lastCommand=command;
                start=true;
         }
        }
}
} public void calculate(double x,String command)
{
   if(lastCommand.equals("+"))   result+=x;
   else if(lastCommand.equals("-"))   result-=x;
   else if(lastCommand.equals("/"))
   {
    if(x!=0)
      result/=x;
    else
    {
       display.setText("除数不能为0");
       start=false;
       flag=false;
       return;
       }
   }
   else if(lastCommand.equals("*"))   result*=x;
   else if(command.equals("1/x"))
   {
    if(x!=0)
         result=1/x;
       else
    {
       display.setText("除数不能为0");
       start=false;
       flag=false;
       return;
       }    }
   else if(command.equals("sqrt"))
   {
    if(x>=0)
      result=Math.sqrt(x);
    else
    {
      display.setText("函数输入无效");
      start=false;
      flag=false;
      return;
       }
   }
   else if(lastCommand.equals("="))   result=x;    display.setText(""+result);
}
  private JButton display;
  private JPanel panel;
  private double result;
  private String lastCommand;
  private boolean start;
  private boolean flag;
}
import javax.swing.*;
import javax.swing.event.*;
import java.awt.*;
import java.awt.event.*;
public class calculator extends JFrame implements ActionListener
{//这里我把JFrame写成Frame，这个错误找了好久
 JFrame frame;
 
 private JButton jia=new JButton("+"); 
 private JButton jian=new JButton("-"); 
 private JButton cheng=new JButton("*"); 
 private JButton chu=new JButton("/"); 
 private JButton qiuyi=new JButton("%"); 
 private JButton deng=new JButton("="); 
 private JButton fu=new JButton("+/-");
 private JButton dian=new JButton(".");
 private JButton kai=new JButton("sqrt");
 private JButton diao=new JButton("1/x");
 private JButton aa=new JButton("A"); 
 private JButton bb=new JButton("B"); 
 private JButton cc=new JButton("C");
 private JButton dd=new JButton("D");
 private JButton ee=new JButton("E");
 private JButton ff=new JButton("F");
 
 private TextField k1=new TextField(); 
 private objConversion convert = new objConversion();
 
 JMenuItem copy,paste,s,t,help,about,me;
 JRadioButton sixteen,ten,eight,two;
 JButton backspace,ce,c,num0,num1,num2,num3,num4,num5,num6,num7,num8,num9;
 Container cp;
 
 JTextField text;
 String copycontent="";
 boolean clickable=true,clear=true;
 int all=0;
 double qian; 
 String fuhao;
 int jin=10,first=1;
 
 
 public calculator() 
 {
  setTitle("计算器－杨彩制作");
  setSize(400,300);
  setLocation(250,200);
  text=new JTextField(25);
 // text.setEnabled(false);
  text.setText("0.");
  text.setHorizontalAlignment(JTextField.RIGHT);//从右到左
 
  JPanel cp1=new JPanel();
  JPanel cp2=new JPanel();
  JPanel cp3=new JPanel();
  
  cp=getContentPane();
  cp.add(cp1,"North");
  cp.add(cp2,"Center");
  cp.add(cp3,"South");
  
  cp1.setLayout(new GridLayout(1,6));
  cp2.setLayout(new Grid

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