只用AWT制作计算器，不许使用swing？

事件都在awt包里
Swing和AWT没有什么区别不过话说回来，你们老师还是真的牛啊
非要你们用一个已经过时的，被官方抛弃掉的awt去做东西

这是我大一时做的，基本上都是用awt做的，楼主觉得哪有不好，自己在修饰一下就好
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.FlowLayout;
import java.awt.GridLayout;
import java.awt.Insets;
import java.awt.Menu;
import java.awt.MenuBar;
import java.awt.MenuItem;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JTextField;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;public class Mycalculator extends JFrame
{
private String[] names = { "退格", "CE", "C", "/", "7", "8", "9", "*", "4",
"5", "6", "-", "1", "2", "3", "+", "0", "+/-", ".", "=" };
private JButton[] jb = new JButton[names.length];
private double x = 0d;
private double y = 0d;
private int z;// 作为运算符的选择
StringBuffer str;
JPanel p;
JPanel p1;
JTextField jt;
MenuItem mi; public Mycalculator()
{
super("Followme_1987");
MenuBar mb = new MenuBar();// 设置菜单栏
setMenuBar(mb);
Menu me = new Menu("编辑");
Menu me1 = new Menu("关于");
Menu me2 = new Menu("帮助");
mi = new MenuItem("请点我");
mi.addActionListener(new Mc());
me1.add(mi);
mb.add(me);
mb.add(me1);
mb.add(me2);
jt = new JTextField(19);// 创建文本框用于显示
jt.setHorizontalAlignment(JTextField.RIGHT);
jt.setText("0.");
jt.setEditable(false);
p = new JPanel(); // 创建一块板儿并将文本框加入
p.setBounds(8, 2, 220, 30);
p.setLayout(new FlowLayout(FlowLayout.LEFT));
p.add(jt);
p1 = new JPanel(); // 创建另一块儿板儿
p1.setLayout(new GridLayout(5, 4, 5, 5));
p1.setBounds(13, 35, 210, 140);
jt.setBackground(Color.getHSBColor(23, 25, 125));
for (int i = 0; i < jb.length; i++)
{ // 加入按钮
jb[i] = new JButton(names[i]);
jb[i].setMargin(new Insets(4, 1, 4, 1));
p1.add(jb[i]);
if (i == 1 || i == 2 || i == 0)
{
jb[i].setForeground(Color.BLUE);
}
else if (i == 3 || i == 7 || i == 11 || i == 15)
{
jb[i].setForeground(Color.RED);
}
else if (i == 19)
{
jb[i].setForeground(Color.YELLOW);
jb[i].setBackground(Color.RED);
}
else
{
jb[i].setBackground(Color.DARK_GRAY);
jb[i].setForeground(Color.YELLOW);
}
jb[i].addActionListener(new Mc()); }// 以上颜色带给人轻松的感觉避免视觉疲劳 setLayout(null);
add(p1);
add(p);
str = new StringBuffer(); } /**
* @param args
*/
public static void main(String[] args)
{ // TODO Auto-generated method stub
Mycalculator frame = new Mycalculator();
frame.setBounds(400, 200, 240, 230);
// frame.setLocationRelativeTo(null);
frame.setDefaultCloseOperation(EXIT_ON_CLOSE);
frame.setVisible(true);
frame.setResizable(false);
} public class Mc implements ActionListener
{
public void actionPerformed(ActionEvent e)
{
if (e.getSource() == mi)
{
JOptionPane.showMessageDialog(null, "楼主要记得结贴......");
}
if (e.getSource() == jb[0])
{ // 按下退格键
if (!jt.getText().trim().equals("0."))
{
if (str.length() != 1)
{ jt.setText(str.delete(str.length() - 1, str.length())
.toString()); }
else
{
jt.setText("0.");
str.setLength(0);
}
y = Double.parseDouble(jt.getText().trim());
}
}
else if (e.getSource() == jb[1] || e.getSource() == jb[2])
{ // 按下CE键或者C键
jt.setText("0.");
str.setLength(0);
x = 0d;
y = 0d;
z = 0;
}
else if (e.getSource() == jb[3])
{ // 按下除号键并且设置z=1
x = Double.parseDouble(jt.getText().trim());
str.setLength(0);
y = 0d;
z = 1;
}
else if (e.getSource() == jb[7])
{ // 按下乘号键并且设置z=2
x = Double.parseDouble(jt.getText().trim());
str.setLength(0);
y = 0d;
z = 2;
}
else if (e.getSource() == jb[11])
{ // 按下减号键并且设置z=3
x = Double.parseDouble(jt.getText().trim());
str.setLength(0);
y = 0d;
z = 3;
}
else if (e.getSource() == jb[15])
{ // 按下加号键并且设置z=4
x = Double.parseDouble(jt.getText().trim());
str.setLength(0);
y = 0d;
z = 4;
}
else if (e.getSource() == jb[19])
{ // 按下=号键
str.setLength(0);
switch (z)
{
case 1:
jt.setText("" + (x / y));
break;
case 2:
jt.setText("" + (x * y));
break;
case 3:
jt.setText("" + (x - y));
break;
case 4:
jt.setText("" + (x + y));
break;
}
}
else if (e.getSource() == jb[17])
{ // 按下+/-
if (jt.getText().trim().equals("0."))
{
}
else
{
// x = Double.parseDouble(jt.getText().trim());
// jt.setText("" + (-x));
if (jt.getText().trim().startsWith("-"))
{
jt.setText(jt.getText().trim().substring(1));
}
else
{
jt.setText("-" + jt.getText().trim());
}
}
}
else if (e.getSource() == jb[18])
{ // 按下小数点
if (jt.getText().trim().indexOf(".") != -1)
{// 字符串中有小数点
if (jt.getText().trim().equals("0."))
{ // 为初始状态
str.setLength(0);
jt.setText(str.append("0.").toString());
}
else
{
}
} else
{
jt.setText(str.append(e.getActionCommand()).toString());
}
y = 0d;
}
else if (e.getSource() == jb[16])
{// 按下0键
if (!jt.getText().trim().equals("0."))
{
jt.setText(str.append(e.getActionCommand()).toString());
y = Double.parseDouble(e.getActionCommand().trim());
}
else
{
}
}
else
{// 按下其他数字键 jt.setText(str.append(e.getActionCommand()).toString());
y = Double.parseDouble(jt.getText().trim());
}
}
}
}

发个CoreJava里面用Swing写的给你参考一下。个人感觉很经典
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;/**
* @version 1.33 2007-06-12
* @author Cay Horstmann
*/
public class Calculator
{
   public static void main(String[] args)
   {
      EventQueue.invokeLater(new Runnable()
         {
            public void run()
            {
               CalculatorFrame frame = new CalculatorFrame();
               frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
               frame.setVisible(true);
            }
         });
   }
}/**
* A frame with a calculator panel.
*/
class CalculatorFrame extends JFrame
{
   public CalculatorFrame()
   {
      setTitle("Calculator");
      CalculatorPanel panel = new CalculatorPanel();
      add(panel);
      pack();
   }
}/**
* A panel with calculator buttons and a result display.
*/
class CalculatorPanel extends JPanel
{
   public CalculatorPanel()
   {
      setLayout(new BorderLayout());      result = 0;
      lastCommand = "=";
      start = true;      // add the display      display = new JButton("0");
      display.setEnabled(false);
      add(display, BorderLayout.NORTH);      ActionListener insert = new InsertAction();
      ActionListener command = new CommandAction();      // add the buttons in a 4 x 4 grid      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);
   }   /**
    * Adds a button to the center panel.
    * @param label the button label
    * @param listener the button listener
    */
   private void addButton(String label, ActionListener listener)
   {
      JButton button = new JButton(label);
      button.addActionListener(listener);
      panel.add(button);
   }   /**
    * This action inserts the button action string to the end of the display text.
    */
   private class InsertAction implements ActionListener
   {
      public void actionPerformed(ActionEvent event)
      {
         String input = event.getActionCommand();
         if (start)
         {
            display.setText("");
            start = false;
         }
         display.setText(display.getText() + input);
      }
   }   /**
    * This action executes the command that the button action string denotes.
    */
   private class CommandAction implements ActionListener
   {
      public void actionPerformed(ActionEvent event)
      {
         String command = event.getActionCommand();

         System.out.println(command);
         if (start)
         {
            if (command.equals("-"))
            {
             System.out.println(command);
               display.setText(command);
               start = false;
            }
            else lastCommand = command;
         }
         else
         {
            calculate(Double.parseDouble(display.getText()));
            lastCommand = command;
            start = true;
         }
      }
   }   /**
    * Carries out the pending calculation.
    * @param x the value to be accumulated with the prior result.
    */
   public void calculate(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;
      display.setText("" + result);
   }   private JButton display;
   private JPanel panel;
   private double result;
   private String lastCommand;
   private boolean start;
}

//发个纯正awt的
import java.lang.Math.*;
import java.awt.Button;
import java.awt.Font;
import java.awt.Frame;
import java.awt.GridLayout;
import java.awt.Panel;
import java.awt.TextField;
import java.awt.Window;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.ItemEvent;
import java.awt.event.ItemListener;
import java.awt.event.WindowEvent;
import java.awt.event.WindowListener;public class jisuqi extends Frame implements ActionListener, WindowListener, ItemListener {    int i;
    double c;
    String s[] = {"Backspace", "CE", "C", "7", "8", "9", "/", "sqrt", "4", "5", "6", "*", "%", "1", "2", "3", "-", "1/x", "0", " +/-", ".", "+", "="};
    Button but[] = new Button[s.length];
    TextField t1 = new TextField("0");    jisuqi() {
        super("计算器");
        setSize(250, 250);
        Font f;
        f = new Font("黑体", Font.BOLD, 45);
        for (int i = 0; i < s.length; i++) {
            but[i] = new Button(s[i]);
            but[i].addActionListener(this);
        }
        setLayout(new GridLayout(4, 1));
        Panel p1 = new Panel();
        p1.setLayout(new GridLayout(1, 1, 1, 1));
        p1.add(t1);
        add(p1);
        Panel p2 = new Panel();
        p2.setLayout(new GridLayout(1, 3));
        for (int i = 0; i < 3; i++) {
            p2.add(but[i]);
        }
        add(p2);
        Panel p3 = new Panel();
        p3.setLayout(new GridLayout(2, 5));
        for (int i = 3; i < 13; i++) {
            p3.add(but[i]);
        }
        add(p3);
        Panel p4 = new Panel();
        p4.setLayout(new GridLayout(2, 5));
        for (int i = 13; i < 23; i++) {
            p4.add(but[i]);
        }
        add(p4);
        addWindowListener(this);
        setVisible(true);
    }    public void actionPerformed(ActionEvent a) {
        String s = a.getActionCommand();
        String b;
        if (s.equals("Backspace")) {
            b = t1.getText().substring(0, t1.getText().length() - 1);
            if (b.length() == 0) {
                t1.setText("0");
            }
            if (t1.getText().equals("0") || t1.getText().equals("")) {
                t1.setText("0");
            } else {
                t1.setText(b);
            }
        }
        if (s.equals("C") || s.equals("CE")) {
            t1.setText("0");
        }
        if (s.equals("0")) {
            if (t1.getText().equals("0")) {
                t1.setText("0");
            } else {
                t1.setText(t1.getText() + "0");
            }
        }
        if (s.equals("1")) {
            if (t1.getText().equals("0")) {
                t1.setText("1");
            } else {
                t1.setText(t1.getText() + "1");
            }
        }
        if (s.equals("2")) {
            if (t1.getText().equals("0")) {
                t1.setText("2");
            } else {
                t1.setText(t1.getText() + "2");
            }
        }
        if (s.equals("3")) {
            if (t1.getText().equals("0")) {
                t1.setText("3");
            } else {
                t1.setText(t1.getText() + "3");
            }
        }
        if (s.equals("4")) {
            if (t1.getText().equals("0")) {
                t1.setText("4");
            } else {
                t1.setText(t1.getText() + "4");
            }
        }
        if (s.equals("5")) {
            if (t1.getText().equals("0")) {
                t1.setText("5");
            } else {
                t1.setText(t1.getText() + "5");
            }
        }
        if (s.equals("6")) {
            if (t1.getText().equals("0")) {
                t1.setText("6");
            } else {
                t1.setText(t1.getText() + "6");
            }
        }
        if (s.equals("7")) {
            if (t1.getText().equals("0")) {
                t1.setText("7");
            } else {
                t1.setText(t1.getText() + "7");
            }
        }
        if (s.equals("8")) {
            if (t1.getText().equals("0")) {
                t1.setText("8");
            } else {
                t1.setText(t1.getText() + "8");
            }
        }
        if (s.equals("9")) {
            if (t1.getText().equals("0")) {
                t1.setText("9");
            } else {
                t1.setText(t1.getText() + "9");
            }
        }
        if (s.equals("+")) {
            b = t1.getText();
            c = Double.parseDouble(b);
            t1.setText("");
            i = 0;
        }
        if (s.equals("-")) {
            b = t1.getText();
            c = Double.parseDouble(b);
            t1.setText("");
            i = 1;
        }
        if (s.equals("*")) {
            b = t1.getText();
            c = Double.parseDouble(b);
            t1.setText("");
            i = 2;
        }
        if (s.equals("/")) {
            b = t1.getText();
            c = Double.parseDouble(b);
            t1.setText("");
            i = 3;
        }
        if (s.equals(".")) {
            if (!t1.getText().substring(t1.getText().length() - 1, t1.getText().length()).equals(".")) {
                t1.setText(t1.getText() + ".");
            }
        }
        if (s.equals("sqrt")) {
            b = t1.getText();
            double d = Double.parseDouble(b);
            double e = Math.sqrt(d);
            t1.setText(Double.toString(e));
        }
        if (s.equals("%")) {
            b = t1.getText();
            double d = Double.parseDouble(b);
            t1.setText(Double.toString(d / 100));
        }
        if (s.equals("1/x")) {
            b = t1.getText();
            double d = Double.parseDouble(b);
            double e = 1 / d;
            t1.setText(Double.toString(e));
        }
        if (s.equals("+/-")) {
            if (t1.getText().substring(0, 1).equals("-")) {
                t1.setText(t1.getText().substring(1, t1.getText().length()));
            } else {
                t1.setText("-" + t1.getText());
            }
        }
        if (s.equals("=")) {
            b = t1.getText();
            double c1 = Double.parseDouble(b);
            if (i == 0) {
                t1.setText(Double.toString(c + c1));
            }
            if (i == 1) {
                t1.setText(Double.toString(c - c1));
            }
            if (i == 2) {
                t1.setText(Double.toString(c * c1));
            }
            if (i == 3) {
                t1.setText(Double.toString(c / c1));
            }
        }
    }    public void windowActivated(WindowEvent arg0) {
    }    public void windowClosed(WindowEvent arg0) {
    }    public void windowClosing(WindowEvent arg0) {
        Window f = (Window) arg0.getSource();
        f.dispose();    }    public void windowDeactivated(WindowEvent arg0) {
    }    public void windowDeiconified(WindowEvent arg0) {
    }    public void windowIconified(WindowEvent arg0) {
    }    public void windowOpened(WindowEvent arg0) {
    }    public void itemStateChanged(ItemEvent arg0) {
    }    public static void main(String[] args) {
        jisuqi s = new jisuqi();
    }
}

/*
这是我两年前写的，此计算机的功能不甚强大。
它可以实现加、减、乘、除，当然，可以输入一串算式，可以加括号，运算时是会判断优先级的。不过，输入算式时，一定要输入标准的，否则会没有反应。
标准的如：12*(34/(45-32))+98
不标准的：12(34+98)   (这里，乘号不能少)
          +12         (这也不行，呵呵)功能键：
AC：清屏（遇到问题时，按这个键即可）
C：退格键（即删除一个字符）
RE: 重新显示（在按下“＝”以后，算式没了，显示的是结果，如果你还想看算式，可以按下此键
最后说明一下：如果你运行它的时候，发现只看到一个界面，没有按钮等情况，请不要怀疑我的程序，可能是系统的问题。当然，遇到这种情况，你关闭窗口。再次运行，就不会有这种问题了。如果还有什么问题的话，可以用QQ留言给我：815611030
*/
import java.awt.*;
import java.awt.event.*;
import java.util.*;
class Stack
{
    String s[]=new String[100];
    int n=0;
    public void InQuece(String str)
    {
        s[n]=str;
        n++;
    }
    public String DeQuece()
    {
        return s[--n];
    }
    public String Front()
    {
        return s[n-1];
    }
    public void Sprint()
    {
        for(int i=n-1;i>=0;i--)
            System.out.print(s[i]+" ");
        System.out.println();
    }
}
public class Calculator
{
    static Frame frm=new Frame("Calculator");
    //static TextField tff=new TextField(20);
    static Label lab=new Label("0.");
    static Panel pan=new Panel();
    static String labelstr="";
    static String ltemp="";
    static int flag=1;
    static Button b0,b1,b2,b3,b4,b5,b6,b7,b8,b9,b10,b11,b12,b13,b14,b15,b16,b17,b18,b19;
    public void setFrame()
    {
        frm.setBounds(300,150,400,350);
        frm.setLayout(null);
        frm.addWindowListener(new window());
        frm.setVisible(true);
        b0=new Button("0");b1=new Button("1");b2=new Button("2");b3=new Button("3");b4=new Button("4");b5=new Button("5");b6=new Button("6");
        b7=new Button("7");b8=new Button("8");b9=new Button("9");
        b10=new Button("+");b11=new Button("-");b12=new Button("*");b13=new Button("/");b14=new Button("AC");b15=new Button("C");b16=new Button("=");
        b17=new Button("(");b18=new Button(")");b19=new Button("RE");
        lab.setBounds(0, 30, 400, 40);
        lab.setFont(new Font("宋体",Font.PLAIN,30));
        lab.setAlignment(Label.RIGHT);
        pan.setBounds(0,60, 400, 300);
        pan.setLayout(new GridLayout(5,4));
        b0.addActionListener(new action());b1.addActionListener(new action());b2.addActionListener(new action());b3.addActionListener(new action());b4.addActionListener(new action());
        b5.addActionListener(new action());b6.addActionListener(new action());b7.addActionListener(new action());b8.addActionListener(new action());b9.addActionListener(new action());
        b10.addActionListener(new action());b11.addActionListener(new action());b12.addActionListener(new action());b13.addActionListener(new action());b14.addActionListener(new action());
        b15.addActionListener(new action());b16.addActionListener(new action());b17.addActionListener(new action());b18.addActionListener(new action());b19.addActionListener(new action());
        pan.add(b1);pan.add(b2);pan.add(b3);pan.add(b10);pan.add(b4);pan.add(b5);pan.add(b6);pan.add(b11);pan.add(b7);pan.add(b8);pan.add(b9);pan.add(b12);
        pan.add(b0);pan.add(b14);pan.add(b15);pan.add(b13);pan.add(b16);pan.add(b17);pan.add(b18);pan.add(b19);
        frm.add(lab);
        frm.add(pan);
        frm.setVisible(true);
    }

public double cal(String str)
    {
        str=str.trim();
        StringTokenizer st=new StringTokenizer(str,"+-*/ ",true);
        Stack sta=new Stack();
        String s,s1,s2;
        while(st.hasMoreTokens())
        {
            s=st.nextToken();
            if(s.equals("#"))
                break;
            if(s.equals(" "))
                continue;
            if(!(s.equals("+")||s.equals("-")||s.equals("/")||s.equals("*")))
            {
                sta.InQuece(s);
            }
            else if(s.equals("+"))
            {
                s2=sta.DeQuece();
                s1=sta.DeQuece();
                Double d1=Double.parseDouble(s1);
                Double d2=Double.parseDouble(s2);
                d1=d1+d2;
                sta.InQuece(""+d1);
            }
            else if(s.equals("-"))
            {
                s2=sta.DeQuece();
                s1=sta.DeQuece();
                Double d1=Double.parseDouble(s1);
                Double d2=Double.parseDouble(s2);
                d1=d1-d2;
                sta.InQuece(""+d1);
            }
            else if(s.equals("/"))
            {
                s2=sta.DeQuece();
                s1=sta.DeQuece();
                Double d1=Double.parseDouble(s1);
                Double d2=Double.parseDouble(s2);
                d1=d1/d2;
                sta.InQuece(""+d1);
            }
            else if(s.equals("*"))
            {
                s2=sta.DeQuece();
                s1=sta.DeQuece();
                Double d1=Double.parseDouble(s1);
                Double d2=Double.parseDouble(s2);
                d1=d1*d2;
                sta.InQuece(""+d1);
            }
        }
        s=sta.DeQuece();
        return Double.parseDouble(s);
    }
    public String InfixToPostfix(String s)
    {
        String restr="";
        String temp="";
        StringTokenizer st=new StringTokenizer(s,"+-/*#() ",true);
        Stack sta=new Stack();
        sta.InQuece("#");
        while(st.hasMoreTokens())
        {
            temp=st.nextToken();
            if(temp.equals("#"))
            {
                while(true)
                {
                    String t=sta.DeQuece();
                    if(t.equals("#"))
                    {
                        break;
                    }
                    restr=restr+t+" ";
                }
                break;
            }
            else if(temp.equals(" "))
                continue;
            else if(!(temp.equals("(")||temp.equals(")")||temp.equals("+")||temp.equals("-")||temp.equals("*")||temp.equals("/")))
            {
                restr=restr+temp+" ";
            }
            else if(temp.equals(")"))
            {
                while(true)
                {
                    String t=sta.DeQuece();
                    if(t.equals("("))
                        break;
                    else
                    {
                        restr=restr+t+" ";
                    }
                }
            }
            else if(temp.equals("(")||temp.equals("+")||temp.equals("-")||temp.equals("*")||temp.equals("/"))
            {
                while(icp(temp)<=isp(sta.Front()))
                {
                    String t=sta.DeQuece();
                    restr=restr+t+" ";
                }
                sta.InQuece(temp);
            }
            //sta.Sprint();
        }
        return restr;
    }
    public int icp(String s)
    {
        if(s.equals("#"))
            return 0;
        else if(s.equals("("))
            return 7;
        else if(s.equals("*")||s.equals("/"))
            return 4;
        else if(s.equals("+")||s.equals("-"))
            return 2;
        else if(s.equals(")"))
            return 1;
        else
            return -1;
    }
    public int isp(String s)
    {
        if(s.equals("#"))
            return 0;
        else if(s.equals("("))
            return 1;
        else if(s.equals("*")||s.equals("/"))
            return 5;
        else if(s.equals("+")||s.equals("-"))
            return 3;
        else if(s.equals(")"))
            return 7;
        else
            return -1;
    }
    public static void main(String args[])
    {
        Calculator c=new Calculator();
        c.setFrame();
        System.out.println(c.cal(c.InfixToPostfix("1*(2+3/4)*10#")));
    }
    static class action implements ActionListener
    {
        public void actionPerformed(ActionEvent e)
        {
            Button bu=(Button)e.getSource();
            //ltemp=labelstr;
            if(flag==1)
            {
                labelstr="";
                flag=0;
            }
            if(bu==b0)
                labelstr=labelstr+"0";
            else if(bu==b1)
                labelstr=labelstr+"1";
            else if(bu==b2)
                labelstr=labelstr+"2";
            else if(bu==b3)
                labelstr=labelstr+"3";
            else if(bu==b4)
                labelstr=labelstr+"4";
            else if(bu==b5)
                labelstr=labelstr+"5";
            else if(bu==b6)
                labelstr=labelstr+"6";
            else if(bu==b7)
                labelstr=labelstr+"7";
            else if(bu==b8)
                labelstr=labelstr+"8";
            else if(bu==b9)
                labelstr=labelstr+"9";
            else if(bu==b10)
                labelstr=labelstr+"+";
            else if(bu==b11)
                labelstr=labelstr+"-";
            else if(bu==b12)
                labelstr=labelstr+"*";
            else if(bu==b13)
                labelstr=labelstr+"/";
            else if(bu==b14)//AC
            {
                ltemp=labelstr;
                labelstr="0.";
                flag=1;
            }
            else if(bu==b15)//C
            {
                labelstr=labelstr.substring(0, labelstr.length()-1);
                if(labelstr.length()==0)
                {
                    labelstr="0.";
                    flag=1;
                }
            }
            else if(bu==b16)//=
            {
                ltemp=labelstr;
                double b=new Calculator().cal(new Calculator().InfixToPostfix(labelstr+"#"));
                labelstr=""+b;
                lab.setText(labelstr);
                flag=1;
                return;
            }
            else if(bu==b17)
            {
               labelstr=labelstr+"(";
            }
            else if(bu==b18)
            {
                labelstr=labelstr+")";
            }
            else if(bu==b19)
            {
                labelstr=ltemp;
            }
            lab.setText(labelstr);
        }
    }
    static class window extends WindowAdapter
    {
        public void windowClosing(WindowEvent e)
        {
            frm.dispose();
            System.exit(0);
        }
    }
}

调试易

只用AWT制作计算器，不许使用swing？

解决方案 »