30-08-2011, 12:04 PM
Code:
import java.awt.*;
import java.awt.event.*;
import java.applet.*;
/*
<applet code = "calc" width = 750 height = 600>
</applet>
*/
public class calc extends Applet implements ActionListener{
String msg = "",flag = "";
int i=0,j=0;
Button one,two,three,four,five,six,seven,eight,nine,zero;
Button plus,minus,mul,div,equal,ce;
TextField text;
Button blist[] = new Button[10];
public void init(){
setLayout(null);
one = new Button("1");
two = new Button("2");
three = new Button("3");
four = new Button("4");
five = new Button("5");
six = new Button("6");
seven = new Button("7");
eight = new Button("8");
nine = new Button("9");
zero = new Button("0");
plus = new Button("+");
minus = new Button("-");
mul = new Button("*");
div = new Button("/");
equal = new Button("=");
ce = new Button("c");
one.setBounds(200,200,20,20);
two.setBounds(230,200,20,20);
three.setBounds(260,200,20,20);
four.setBounds(200,230,20,20);
five.setBounds(230,230,20,20);
six.setBounds(260,230,20,20);
seven.setBounds(200,260,20,20);
eight.setBounds(230,260,20,20);
nine.setBounds(260,260,20,20);
zero.setBounds(200,290,20,20);
plus.setBounds(290,200,20,20);
minus.setBounds(290,230,20,20);
mul.setBounds(290,260,20,20);
div.setBounds(290,290,20,20);
equal.setBounds(260,290,20,20);
ce.setBounds(230,290,20,20);
text = new TextField(10);
text.setBounds(200,170,110,20);
blist[0] = (Button) add(zero);
blist[1] = (Button) add(one);
blist[2] = (Button) add(two);
blist[3] = (Button) add(three);
blist[4] = (Button) add(four);
blist[5] = (Button) add(five);
blist[6] = (Button) add(six);
blist[7] = (Button) add(seven);
blist[8] = (Button) add(eight);
blist[9] = (Button) add(nine);
add(plus);
add(minus);
add(mul);
add(div);
add(equal);
add(ce);
add(text);
for(int i=0;i<10;i++)
blist[i].addActionListener(this);
plus.addActionListener(this);
minus.addActionListener(this);
mul.addActionListener(this);
div.addActionListener(this);
equal.addActionListener(this);
ce.addActionListener(this);
text.addActionListener(this);
}
public void actionPerformed(ActionEvent ae){
String str = ae.getActionCommand();
if(str.equals("1"))
i = i*10 + 1;
else if(str.equals("2"))
i = i*10 + 2;
else if(str.equals("3"))
i = i*10 + 3;
else if(str.equals("4"))
i = i*10 + 4;
else if(str.equals("5"))
i = i*10 + 5;
else if(str.equals("6"))
i = i*10 + 6;
else if(str.equals("7"))
i = i*10 + 7;
else if(str.equals("8"))
i = i*10 + 8;
else if(str.equals("9"))
i = i*10 + 9;
else if(str.equals("0"))
i = i*10;
if (str.equals("=")){
if (flag.equals("+"))
i += j;
if (flag.equals("-"))
i = j-i;
if (flag.equals("*"))
i *= j;
if (flag.equals("/"))
i = j/i;
}
if (str.equals("+")){
if (flag.equals("+"))
{i += j;j=i;}
else
{j = i;i=0;}
flag = "+";
}
if (str.equals("-")){
if (flag.equals("-"))
{ i = j-i;j=i;}
else
{j = i;i=0;}
flag = "-";
}
if (str.equals("*")){
if (flag.equals("*"))
{ i *= j;j=i;}
else
{j = i;i=0;}
flag = "*";
}
if (str.equals("/")){
if (flag.equals("/"))
{ i = j/i;j=i;}
else
{j = i;i=0;}
flag = "/";
}
if (str.equals("c"))
{ i = 0;j=0;flag = "";}
text.setText(i+"");
if (str.equals("=")) i=0;
repaint();
}
public void paint(Graphics g){
g.drawString(msg,100,100);
}
}