初学java三个月写的计算器源代码

发布: 2007-7-04 13:34 | 作者: admin | 来源: 　网友评论 | 查看: 244次 | 进入软件测试论坛讨论

好不容易做完了几经调试呀呵呵

    import java.awt.*;
import java.awt.event.*;
public class jisuanqi extends WindowAdapter
{
static double a=0,c;
static String str,s;
public static void main(String []args)
{
  (new jisuanqi()).chuangkou();
}
public void windowClosing(WindowEvent e)
{
  System.exit(0);
}
TextField t=new TextField(30);
Button b=new Button("1");
Button b2=new Button("2");
Button b3=new Button("3");
Button b4=new Button("4");
Button b5=new Button("5");
Button b6=new Button("6");
Button b7=new Button("7");
Button b8=new Button("8");
Button b9=new Button("关闭");
Button b10=new Button("清除");
Button b11=new Button("9");
Button b12=new Button("0");
Button b0=new Button("=");
Button b13=new Button("+");
Button b14=new Button("-");
Button b15=new Button("*");
Button b16=new Button("/");
Button b17=new Button("说明");
public void chuangkou()
{
  Frame f=new Frame("你好 AWT 窗口");
  f.addWindowListener(this);
  f.setLocation(300,200);
  f.setBackground(Color.green);
  f.setSize(300,300);
  f.setLayout(new GridLayout(5,3,10,10));
  b9.setBackground(Color.yellow);
  //b0.setBackground(Color.blue);
  b9.addActionListener(new close());
  b.addActionListener(new wang());
  b2.addActionListener(new wang());
  b3.addActionListener(new wang());
  b4.addActionListener(new wang());
  b5.addActionListener(new wang());
  b6.addActionListener(new wang());
  b7.addActionListener(new wang());
  b8.addActionListener(new wang());
  b10.addActionListener(new wang());
  b11.addActionListener(new wang());
  b12.addActionListener(new wang());
  b0.addActionListener(new wang());
  b13.addActionListener(new wang());
  b14.addActionListener(new wang());
  b15.addActionListener(new wang());
  b16.addActionListener(new wang());
  b17.addActionListener(new wang());
  f.add(t);
  f.add(b);
  f.add(b2);
  f.add(b3);
  f.add(b4);
  f.add(b5);
  f.add(b6);
  f.add(b7);
  f.add(b8);
  f.add(b11);
  f.add(b12);
  f.add(b13);
  f.add(b14);
  f.add(b15);
  f.add(b16);
  f.add(b17);
  f.add(b9);
  f.add(b10);
  f.add(b0);
  f.setVisible(true);
}
class wang implements ActionListener
{
  public void actionPerformed(ActionEvent e)
  {
   Button tt=(Button)e.getSource();
   if (tt.getLabel()=="=")
   {
    jisuan();
    s=String.valueOf(a);
    t.setText(s);
    str="";
   }
   else if(tt.getLabel()=="+")
   {
    jisuan();
    t.setText("");
    str="+";
   }
   else if(tt.getLabel()=="-")
   {
    jisuan();
    t.setText("");
    str="-";
   }
   else if(tt.getLabel()=="*")
   {
    jisuan();
    t.setText("");
    str="*";
   }
   else if(tt.getLabel()=="/")
   {
    jisuan();
    t.setText("");
    str="/";
   }
   else
   t.setText(t.getText()+tt.getLabel());
   if(tt.getLabel()=="说明")
   t.setText("!先清空再使用!");
   if(tt.getLabel()=="清除")
   t.setText("");
  }
  public void jisuan()
  {
   if(str=="+")
   {
    a+=Double.valueOf(t.getText());
   }
   else if(str=="-")
   {
    a-=Double.valueOf(t.getText());
   }
   else if(str=="*")
   {
    a*=Double.valueOf(t.getText());
   }
   else if(str=="/")
   {
    a/=Double.valueOf(t.getText());
   }
   else
   {
    a=Double.valueOf(t.getText());
   }
  }
}
}
class close implements ActionListener
{
public void actionPerformed (ActionEvent e)
{
  System.exit(0);
}
}