package jisuanqi;
import java.awt.*;
import java.awt.event.*;
import java.lang.*;
import javax.swing.*;
public class Jisuanqi2 extends Frame
{
//
GridLayout gl1,gl2,gl3;
Panel p0,p1,p2,p3;
JTextField tf1;
TextField tf2;
Button b0,b1,b2,b3,b4,b5,b6,b7,b8,b9,b10,b11,b12,b13,b14,b15,b16,b17,b18,b19,b20,b21,b22,b23,b24,b25,b26;
StringBuffer str;//
double x,y;//x y
int z;//Z .0 "+",1 "-",2 "*",3 "/"
static double m;//
public Jisuanqi2()
{
gl1=new GridLayout(1,4,10,0);//
gl2=new GridLayout(4,1,0,15);
gl3=new GridLayout(4,5,10,15);
tf1=new JTextField(27);//
tf1.setHorizontalAlignment(JTextField.RIGHT);
tf1.setEnabled(false);
tf1.setText("0");
tf2=new TextField(10);//
tf2.setEditable(false);
// 、
b0=new Button("Backspace");
b0.setForeground(Color.black);
b0.addActionListener(new Bt());
b1=new Button("CE");
b1.setForeground(Color.black);
b1.addActionListener(new Bt());
b2=new Button("C");
b2.setForeground(Color.black);
b2.addActionListener(new Bt());
b3=new Button("MC");
b3.setForeground(Color.black);
b3.addActionListener(new Bt());
b4=new Button("MR");
b4.setForeground(Color.black);
b4.addActionListener(new Bt());
b5=new Button("MS");
b5.setForeground(Color.black);
b5.addActionListener(new Bt());
b6=new Button("M+");
b6.setForeground(Color.black);
b6.addActionListener(new Bt());
b7=new Button("7");
b7.setForeground(Color.blue);
b7.addActionListener(new Bt());
b8=new Button("8");
b8.setForeground(Color.blue);
b8.addActionListener(new Bt());
b9=new Button("9");
b9.setForeground(Color.blue);
b9.addActionListener(new Bt());
b10=new Button("/");
b10.setForeground(Color.black);
b10.addActionListener(new Bt());
b11=new Button("sqrt");
b11.setForeground(Color.blue);
b11.addActionListener(new Bt());
b12=new Button("4");
b12.setForeground(Color.blue);
b12.addActionListener(new Bt());
b13=new Button("5");
b13.setForeground(Color.blue);
b13.addActionListener(new Bt());
b14=new Button("6");
b14.setForeground(Color.blue);
b14.addActionListener(new Bt());
b15=new Button("*");
b15.setForeground(Color.black);
b15.addActionListener(new Bt());
b16=new Button("%");
b16.setForeground(Color.blue);
b16.addActionListener(new Bt());
b17=new Button("1");
b17.setForeground(Color.blue);
b17.addActionListener(new Bt());
b18=new Button("2");
b18.setForeground(Color.blue);
b18.addActionListener(new Bt());
b19=new Button("3");
b19.setForeground(Color.blue);
b19.addActionListener(new Bt());
b20=new Button("-");
b20.setForeground(Color.black);
b20.addActionListener(new Bt());
b21=new Button("1/X");
b21.setForeground(Color.blue);
b21.addActionListener(new Bt());
b22=new Button("0");
b22.setForeground(Color.blue);
b22.addActionListener(new Bt());
b23=new Button("+/-");
b23.setForeground(Color.blue);
b23.addActionListener(new Bt());
b24=new Button(".");
b24.setForeground(Color.blue);
b24.addActionListener(new Bt());
b25=new Button("+");
b25.setForeground(Color.black);
b25.addActionListener(new Bt());
b26=new Button("=");
b26.setForeground(Color.black);
b26.addActionListener(new Bt());
//
p0=new Panel();
p1=new Panel();
p2=new Panel();
p3=new Panel();
//
str=new StringBuffer();
// p0
p0.add(tf1);
p0.setBounds(10,25,300,40);
// p1
p1.setLayout(gl1);
p1.add(tf2);
p1.add(b0);
p1.add(b1);
p1.add(b2);
p1.setBounds(10,65,300,25);
// p2
p2.setLayout(gl2);
p2.add(b3);
p2.add(b4);
p2.add(b5);
p2.add(b6);
p2.setBounds(10,110,40,150);
// p3
p3.setLayout(gl3);// p3
p3.add(b7);
p3.add(b8);
p3.add(b9);
p3.add(b10);
p3.add(b11);
p3.add(b12);
p3.add(b13);
p3.add(b14);
p3.add(b15);
p3.add(b16);
p3.add(b17);
p3.add(b18);
p3.add(b19);
p3.add(b20);
p3.add(b21);
p3.add(b22);
p3.add(b23);
p3.add(b24);
p3.add(b25);
p3.add(b26);
p3.setBounds(60,110,250,150);
// 4
setLayout(null);
add(p0);
add(p1);
add(p2);
add(p3);
setResizable(false);//
//
addWindowListener(new WindowAdapter(){
public void windowClosing(WindowEvent e1)
{
System.exit(0);
}
});
setBackground(Color.lightGray);
setBounds(100,100,320,280);
setVisible(true);
}
//
class Bt implements ActionListener
{
public void actionPerformed(ActionEvent e2)
{
try{
if(e2.getSource()==b1)// "CE"
{
tf1.setText("0");//
str.setLength(0);//
}
else if(e2.getSource()==b2)// "C"
{
tf1.setText("0");//
str.setLength(0);
}
else if(e2.getSource()==b23)// "+/-"
{
x=Double.parseDouble(tf1.getText().trim());
tf1.setText(""+(-x));
}
else if(e2.getSource()==b25)// x z y
{
x=Double.parseDouble(tf1.getText().trim());
str.setLength(0);//
y=0d;
z=0;
}
else if(e2.getSource()==b20)// x z y
{
x=Double.parseDouble(tf1.getText().trim());
str.setLength(0);
y=0d;
z=1;
}
else if(e2.getSource()==b15)// x z y
{
x=Double.parseDouble(tf1.getText().trim());
str.setLength(0);
y=0d;
z=2;
}
else if(e2.getSource()==b10)// x z y
{
x=Double.parseDouble(tf1.getText().trim());
str.setLength(0);
y=0d;
z=3;
}
else if(e2.getSource()==b26)//
{
str.setLength(0);
switch(z)
{
case 0 : tf1.setText(""+(x+y));break;
case 1 : tf1.setText(""+(x-y));break;
case 2 : tf1.setText(""+(x*y));break;
case 3 : tf1.setText(""+(x/y));break;
}
}
else if(e2.getSource()==b24)// "."
{
if(tf1.getText().trim().indexOf(".")!=-1)//
{
}
else//
{
if(tf1.getText().trim().equals("0"))// 0
{
str.setLength(0);
tf1.setText((str.append("0"+e2.getActionCommand())).toString());
}
else if(tf1.getText().trim().equals(""))//
{
}
else
{
tf1.setText(str.append(e2.getActionCommand()).toString());
}
}
y=0d;
}
else if(e2.getSource()==b11)//
{
x=Double.parseDouble(tf1.getText().trim());
tf1.setText(" ");
if(x<0)
tf1.setText(" ");
else
tf1.setText(""+Math.sqrt(x));
str.setLength(0);
y=0d;
}
else if(e2.getSource()==b16)// "%"
{
x=Double.parseDouble(tf1.getText().trim());
tf1.setText(""+(0.01*x));
str.setLength(0);
y=0d;
}
else if(e2.getSource()==b21)// "1/X"
{
x=Double.parseDouble(tf1.getText().trim());
if(x==0)
{
tf1.setText(" ");
}
else
{
tf1.setText(""+(1/x));
}
str.setLength(0);
y=0d;
}
else if(e2.getSource()==b3)//MC
{
m=0d;
tf2.setText("");
str.setLength(0);
}
else if(e2.getSource()==b4)//MR
{
if(tf2.getText().trim()!="")//
{
tf1.setText(""+m);
}
}
else if(e2.getSource()==b5)//MS
{
m=Double.parseDouble(tf1.getText().trim());
tf2.setText("M");
tf1.setText("0");
str.setLength(0);
}
else if(e2.getSource()==b6)//M+ MR
{
m=m+Double.parseDouble(tf1.getText().trim());
}
else//
{
if(e2.getSource()==b22)// "0"
{
if(tf1.getText().trim().equals("0"))//
{
}
else
{
tf1.setText(str.append(e2.getActionCommand()).toString());
y=Double.parseDouble(tf1.getText().trim());
}
}
else if(e2.getSource()==b0)// “BackSpace”
{
if(!tf1.getText().trim().equals("0"))//
{
if(str.length()!=1)
{
tf1.setText(str.delete(str.length()-1,str.length()).toString());//
}
else
{
tf1.setText("0");
str.setLength(0);
}
}
y=Double.parseDouble(tf1.getText().trim());
}
else//
{
tf1.setText(str.append(e2.getActionCommand()).toString());
y=Double.parseDouble(tf1.getText().trim());
}
}
}
catch(NumberFormatException e){
tf1.setText(" ");
}
catch(StringIndexOutOfBoundsException e){
tf1.setText(" ");
}
}
}
public static void main(String args[])
{
new Jisuanqi2();
}
}