Abdullah
Posts: 1
Nickname: abdali
Registered: Dec, 2002
|
|
Re: Calculator
|
Posted: Dec 22, 2002 4:58 AM
|
|
> I've been working on this Calculator program for Java for
> weeks now and it is a total mess!!! Does anyone have any
> code on a simple calculator program with the numeric
> buttons(0-9), (*, /, +, -) functions, and an AC button
> with the label box on teh top?
// A calculator Program
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class Calculator extends Frame implements ActionListener
{
JTextField jt;
JButton bt7;
JButton bt8;
JButton bt9;
JButton btPlus;
JButton bt4;
JButton bt5;
JButton bt6;
JButton btMinus;
JButton bt1;
JButton bt2;
JButton bt3;
JButton btMul;
JButton btDot;
JButton bt0;
JButton btSign;
JButton btDiv;
JButton btSin;
JButton btCos;
JButton btTan;
JButton btC;
JButton btEqual;
JButton btExit;
String str="0",str2="0";
int f,clear;
public Calculator (String title)
{ super(title);
setSize(500,200);
setBackground(Color.blue);
Color functionColor =new Color (0,255,255);
Color equalColor =new Color (255,193,224);
Color exitColor =new Color (255,0,0);
setLayout(new GridLayout(6,4,5,5));
Font f1 = new Font("TimesRoman",Font.BOLD,12);
jt=new JTextField("0",5);
jt.setFont(f1);
add(jt);
bt7=new JButton("7");
bt7.setFont(f1);
bt7.addActionListener(this);
bt8=new JButton("8");
bt8.setFont(f1);
bt8.addActionListener(this);
bt9=new JButton("9");
bt9.setFont(f1);
bt9.addActionListener(this);
btPlus=new JButton("+");
btPlus.setFont(f1);
btPlus.setBackground (functionColor);
btPlus.addActionListener(this);
bt4=new JButton("4");
bt4.setFont(f1);
bt4.addActionListener(this);
bt5=new JButton("5");
bt5.setFont(f1);
bt5.addActionListener(this);
bt6=new JButton("6");
bt6.setFont(f1);
bt6.addActionListener(this);
btMinus=new JButton("-");
btMinus.setFont(f1);
btMinus.setBackground (functionColor);
btMinus.addActionListener(this);
bt1=new JButton("1");
bt1.setFont(f1);
bt1.addActionListener(this);
bt2=new JButton("2");
bt2.setFont(f1);
bt2.addActionListener(this);
bt3=new JButton("3");
bt3.setFont(f1);
bt3.addActionListener(this);
btMul=new JButton("X");
btMul.setFont(f1);
btMul.setBackground (functionColor);
btMul.addActionListener(this);
btDot=new JButton(".");
btDot.setFont(f1);
btDot.addActionListener(this);
bt0=new JButton("0");
bt0.setFont(f1);
bt0.addActionListener(this);
btSign=new JButton("+/-");
btSign.setFont(f1);
btSign.addActionListener(this);
btDiv=new JButton("/");
btDiv.setFont(f1);
btDiv.setBackground (functionColor);
btDiv.addActionListener(this);
btSin=new JButton("Sin");
btSin.setFont(f1);
btSin.setBackground (functionColor);
btSin.addActionListener(this);
btCos=new JButton("Cos");
btCos.setFont(f1);
btCos.setBackground (functionColor);
btCos.addActionListener(this);
btTan=new JButton("Tan");
btTan.setFont(f1);
btTan.setBackground (functionColor);
btTan.addActionListener(this);
btC=new JButton("C");
btC.setFont(f1);
btC.setBackground (functionColor);
btC.addActionListener(this);
btEqual=new JButton("=");
btEqual.setFont(f1);
btEqual.setBackground (equalColor);
btEqual.addActionListener(this);
btExit=new JButton("Exit");
btExit.setFont(f1);
btExit.setBackground (exitColor);
btExit.addActionListener(this);
add(bt7);
add(bt8);
add(bt9);
add(btPlus);
add(bt4);
add(bt5);
add(bt6);
add(btMinus);
add(bt1);
add(bt2);
add(bt3);
add(btMul);
add(btDot);
add(bt0);
add(btSign);
add(btDiv);
add(btSin);
add(btCos);
add(btTan);
add(btC);
add(btEqual);
add(btExit);
setVisible(true);
}
public static void main(String argv[])
{ Calculator app=new Calculator("Calculator");
}
public void actionPerformed(ActionEvent evt)
{
if(evt.getSource()==bt7)
{
if (clear==1)
{
str="";
clear=0;
}
str = str+(bt7.getText());
jt.setText(str);
}
if(evt.getSource()==bt8)
{
if (clear==1)
{
str="";
clear=0;
}
str = str+(bt8.getText());
jt.setText(str);
}
if(evt.getSource()==bt9)
{
if (clear==1)
{
str="";
clear=0;
}
str = str+(bt9.getText());
jt.setText(str);
}
if(evt.getSource()==btPlus)
{
str2=str;
str="";
f=1;
}
if(evt.getSource()==bt4)
{
if (clear==1)
{
str="";
clear=0;
}
str = str+(bt4.getText());
jt.setText(str);
}
if(evt.getSource()==bt5)
{
if (clear==1)
{
str="";
clear=0;
}
str = str+(bt5.getText());
jt.setText(str);
}
if(evt.getSource()==bt6)
{
if (clear==1)
{
str="";
clear=0;
}
str = str+(bt6.getText());
jt.setText(str);
}
if(evt.getSource()==btMinus)
{
str2=str;
str="";
f=2;
}
if(evt.getSource()==bt1)
{
if (clear==1)
{
str="";
clear=0;
}
str = str+(bt1.getText());
jt.setText(str);
}
if(evt.getSource()==bt2)
{
if (clear==1)
{
str="";
clear=0;
}
str = str+(bt2.getText());
jt.setText(str);
}
if(evt.getSource()==bt3)
{
if (clear==1)
{
str="";
clear=0;
}
str = str+(bt3.getText());
jt.setText(str);
}
if(evt.getSource()==btMul)
{
str2=str;
str="";
f=3;
}
if(evt.getSource()==btDot)
{
if (clear==1)
{
str="";
clear=0;
};
str = str+(btDot.getText());
jt.setText(str);
}
if(evt.getSource()==bt0)
{
if (clear==1)
{
str="";
clear=0;
}
str = str+(bt0.getText());
jt.setText(str);
}
if(evt.getSource()==btSign)
{
str = "-"+str;
jt.setText(str);
}
if(evt.getSource()==btDiv)
{
str2=str;
str="";
f=4;
}
if(evt.getSource()==btSin)
{
str2=str;
}
if(evt.getSource()==btCos)
{
str2=str;
}
if(evt.getSource()==btTan)
{
str2=str;
}
if(evt.getSource()==btC)
{
str="0";
jt.setText(str);
}
if(evt.getSource()==btEqual)
{
switch(f)
{
case 1:
float value1 = Float.parseFloat(str2);
float value2 = Float.parseFloat(str);
jt.setText("" + (value1 + value2));
str=(String)jt.getText();
break;
case 2:
float value3 = Float.parseFloat(str2);
float value4 = Float.parseFloat(str);
jt.setText("" + (value3 - value4));
str=(String)jt.getText();
break;
case 3:
float value5 = Float.parseFloat(str2);
float value6 = Float.parseFloat(str);
jt.setText("" + (value5 * value6));
str=(String)jt.getText();
break;
case 4:
float value7 = Float.parseFloat(str2);
float value8 = Float.parseFloat(str);
jt.setText("" + (float)(value7 / value8));
str=(String)jt.getText();
break;
}// switch
f=0;
clear=1;
}//if btEqual
if(evt.getSource()==btSin)
{
float value9 = Float.parseFloat(str);
jt.setText("" + Math.sin(value9));
str=(String)jt.getText();
clear=1;
}
if(evt.getSource()==btCos)
{
float value10 = Float.parseFloat(str);
jt.setText("" + Math.cos(value10));
str=(String)jt.getText();
clear=1;
}
if(evt.getSource()==btTan)
{
float value11 = Float.parseFloat(str);
jt.setText("" + Math.tan(value11));
str=(String)jt.getText();
clear=1;
}
if(evt.getSource()==btExit)
{
dispose();
System.exit(0);
}
}//action Performed
}//class TextField1
|
|
Previous Topic
