수다닷컴

//////////////////////////////
// 자바 계산기 소스 입니다.
//*******************************
// Java script of Calculator
//*******************************

import java.awt.*;
import java.lang.*;
import java.applet.Applet;
import java.awt.event.*;

//===================
// Calculator Applet
//===================
public class Calc extends java.awt.Frame
{
//--------
// member
//--------
TextField text;
String sText1, sText2;
double dReg1, dReg2, dMem;
String sOperator;
boolean isFixReg;
//-------------
// constructor
//-------------
public Calc()
{
Panel pFrame = new Panel();
pFrame.setLayout(new FlowLayout());

text = new TextField();

text.setForeground(Color.yellow);
text.setEditable(false);

Panel pCalc = new Panel();
pCalc.setLayout(new BorderLayout(0, 10));
pCalc.add(North, text);

pFrame.add(Center, pCalc);

Dimension dSize = pCalc.size();
dSize.width = dSize.width + 20;
dSize.height = dSize.height + 20;
pFrame.resize(dSize);

Panel pKey = new Panel();
pKey.setLayout(new GridLayout(5, 4, 5, 5));
add(Center, pKey);
pKey.add(new Button(C));
pKey.add(new Button(MR));
pKey.add(new Button(M-));
pKey.add(new Button(M+));
pKey.add(new Button(7));
pKey.add(new Button(8));
pKey.add(new Button(9));
pKey.add(new Button(/));
pKey.add(new Button(4));
pKey.add(new Button(5));
pKey.add(new Button(6));
pKey.add(new Button(*));
pKey.add(new Button(1));
pKey.add(new Button(2));
pKey.add(new Button(3));
pKey.add(new Button(-));
pKey.add(new Button(0));
pKey.add(new Button(.));
pKey.add(new Button(=));
pKey.add(new Button(+));

pCalc.add(South, pKey);

setLayout(new BorderLayout(0, 0));
add(North, pFrame);
setBackground(Color.darkGray);

dReg1 = 0.0d;
dReg2 = 0.0d;
dMem = 0.0d;
sOperator = ;
text.setText(0);
isFixReg = true;

enableEvents(AWTEvent.WINDOW_EVENT_MASK);
this.setTitle(Calculator );
this.setSize(new Dimension(200, 300));
centerWindow();
this.setVisible(true);
}

//Overridden so we can exit when window is closed
protected void processWindowEvent(WindowEvent e)--- 이부분을 보면 윈도우창이x를 누르

윈도우창이 사라지게프로그래밍 한거같은데....실제로 눌러보면 없 어지지 않아요...왜그런지아시는분 도와주세요...

{
super.processWindowEvent(e);
if (e.getID() == WindowEvent.WINDOW_CLOSING)
{
System.exit(0);
}
}

// move window at center of screen
private void centerWindow()
{
Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
Dimension frameSize = this.getSize();
if (frameSize.height scregt; screenSize.height)
{
frameSize.height = screenSize.height;
}
if (frameSize.width screenSize.width)
{
frameSize.width = screenSize.width;
}
this.setLocation( (screenSize.width - frameSize.width) / 2,
(screenSize.height - frameSize.height) / 2);

}

//---------------
// event handler
//---------------
public boolean action(Event evt, Object arg)
{
//
// numeric key input
//
if (C.equals(arg))
{
dReg1 = 0.0d;
dReg2 = 0.0d;
sOperator = ;
text.setText(0);
isFixReg = true;
}
else if ( (0.equals(arg)) | (1.equals(arg)) | (2.equals(arg))
| (3.equals(arg)) | (4.equals(arg)) | (5.equals(arg))
| (6.equals(arg)) | (7.equals(arg)) | (8.equals(arg))
| (9.equals(arg)) | (..equals(arg)))
{
if (isFixReg)
{
sText2 = (String) arg;
}
else
{
sText2 = text.getText() + arg;
}
text.setText(sText2);
isFixReg = false;
}
//
// operations
//
else if ( (+.equals(arg)) | (-.equals(arg))
| (*.equals(arg)) | (/.equals(arg)) | (=.equals(arg)))
{
sText1 = text.getText();
dReg2 = (Double.valueOf(sText1)).doubleValue();
dReg1 = Calculation(sOperator, dReg1, dReg2);
Double dTemp = new Double(dReg1);
sText2 = dTemp.toString();
text.setText(sText2);
sOperator = (String) arg;
isFixReg = true;
}
//
// memory read operation
//
else if (MR.equals(arg))
{
Double dTemp = new Double(dMem);
sText2 = dTemp.toString();
text.setText(sText2);
sOperator = ;
isFixReg = true;
}
//
// memory add operation
//
else if (M+.equals(arg))
{
sText1 = text.getText();
dReg2 = (Double.valueOf(sText1)).doubleValue();
dReg1 = Calculation(sOperator, dReg1, dReg2);
Double dTemp = new Double(dReg1);
sText2 = dTemp.toString();
text.setText(sText2);
dMem = dMem + dReg1;
sOperator = ;
isFixReg = true;
}
//
// memory sub operation
//
else if (M-.equals(arg))
{
sText1 = text.getText();
dReg2 = (Double.valueOf(sText1)).doubleValue();
dReg1 = Calculation(sOperator, dReg1, dReg2);
Double dTemp = new Double(dReg1);
sText2 = dTemp.toString();
text.setText(sText2);
dMem = dMem - dReg1;
sOperator = ;
isFixReg = true;
}
return true;
}

//-------------
// Calculation
//-------------
private double Calculation(String sOperator, double dReg1, double dReg2)
{
if (+.equals(sOperator))
{
dReg1 = dReg1 + dReg2;
}
else if (-.equals(sOperator))
{
dReg1 = dReg1 - dReg2;
}
else if (*.equals(sOperator))
{
dReg1 = dReg1 * dReg2;
}
else if (/.equals(sOperator))
{
dReg1 = dReg1 / dReg2;
}
else
{
dReg1 = dReg2;
}
return dReg1;
}

public static void main(String[] args)
{
new Calc();
}
}

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