Code for creating a simple Calculator in Java Script.

Questions by cindy7alex   answers by cindy7alex

Showing Answers 1 - 2 of 2 Answers

import java.awt.*;
import java.util.*;
import java.awt.event.*;
import javax.swing.*;
public class calculator1 implements ActionListener,Runnable
 {
 JLabel l1,l2;
  String s1="",s2="",s3="",s4="",s5="";
 String correct[]={"","","","","","","","","",""};
 String named[]={"C","r","e","a","t","e","d"," ","By"," ","B","H","A","S","K","A",R"," ","C","H","A","U","H","A","A","N"," "," "," "," "," "," "," "," "," "," "};
 String  chk[]=new String[100];
 int mid=40,pm=0,dc=0,cdk=0,bn=0,D3=0,k4=0,d4=5,n1=0;
 double  k1=0,k2=0,rm=0,k3=0,gtt=0;
 JFrame f1;
 Thread datimeThread,tname;
 Date date;
 GregorianCalendar calendar;
 String strDate,strTime,strStatus;
  JPanel p1;
  JTextField tf;
  JButton b0;
  JButton b1;
  JButton b2;
  JButton b3;
  JButton b4;
  JButton b5;
  JButton b6;
  JButton b7;
  JButton b8;
  JButton b9;
  JButton plus;
  JButton min;
  JButton div;
  JButton mul;
  JButton per;
  JButton point;
  JButton ac;
  JButton can;
  JButton corr;
  JButton dz;
  JButton eq;
  JButton check;
  JButton gt;
//*************************************************************************************************  
  calculator1()
  { 
   f1=new JFrame("Calculator");
   p1=new JPanel();
   tf=new JTextField(15);
   b0=new JButton("0");
   b1=new JButton("1");
   b2=new JButton("2");
   b3=new JButton("3");
   b4=new JButton("4");
   b5=new JButton("5");
   b6=new JButton("6");
   b7=new JButton("7");
   b8=new JButton("8");
   b9=new JButton("9");
   plus=new JButton("+");
   min=new JButton("-");
   div=new JButton("/");
   mul=new JButton("*");
   per=new JButton("%");
   point=new JButton(".");
   ac=new JButton("AC");
   can=new JButton("C");
   corr=new JButton(" Correct ");
   dz=new JButton("00");
   eq=new JButton("                       =                       ");
   check=new JButton("Replay");
   gt=new JButton("GT");
   l1=new JLabel("");
   l2=new JLabel("");
                 ac.setForeground(Color.red);
   can.setForeground(Color.red);
   corr.setForeground(Color.blue);
   gt.setForeground(Color.blue);
  
  p1.add("East",l2);
  p1.add(tf);
  p1.add(ac);
  p1.add(can);
  p1.add(check);
  p1.add(corr);
  p1.add(b1);
  p1.add(b2);
  p1.add(b3);
  p1.add(b4);
  p1.add(b5);
  p1.add(b6);
  p1.add(b7);
  p1.add(b8);
  p1.add(b9);
  p1.add(b0);
  p1.add(dz);
  p1.add(plus);
  p1.add(min);
  p1.add(div);
  p1.add(mul);
  p1.add(per);
  p1.add(point);
  p1.add(gt);
  p1.add(eq);
  tf.setText("0");
  p1.add(l1);
  
  b0.addActionListener(this);
  b1.addActionListener(this);
  b2.addActionListener(this);
  b3.addActionListener(this);
  b4.addActionListener(this);
  b5.addActionListener(this);
  b6.addActionListener(this);
  b7.addActionListener(this);
  b8.addActionListener(this);
  b9.addActionListener(this);
  dz.addActionListener(this);
  min.addActionListener(this);
  div.addActionListener(this);
  per.addActionListener(this);
  mul.addActionListener(this);
  eq.addActionListener(this);
  plus.addActionListener(this);
  point.addActionListener(this);
  corr.addActionListener(this);
  ac.addActionListener(this);
  can.addActionListener(this);
  gt.addActionListener(this);
  datimeThread=new Thread(this);
  check.addActionListener(this);
  datimeThread=new Thread(this);
  datimeThread.start();
  tname=new Thread(this);
  tname.start();
  f1.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
  f1.getContentPane().add(p1);
  f1.setResizable(false);
  f1.setSize(210,325);
  f1.setVisible(true);
        }
//***************************  END OF CONTRUCTOR  ****************************************
 public static void main(String args[])
 {
 calculator1 app=new calculator1();
 }


//**************************** END OF MAIN  begain of action per  *******************************************

 public void actionPerformed(ActionEvent e)
 {
   if(e.getSource()==b0)
   {
                   s1="0";
                s2=s2+s1;
     correct[pm]=s1;pm++; 
   }

   if(e.getSource()==b1)
   {
                   s1="1";
                s2=s2+s1;correct[pm]=s1;pm++;  
   }

  if(e.getSource()==b2)
   {
                   s1="2";
                s2=s2+s1;correct[pm]=s1;pm++;  
   }
  if(e.getSource()==b3)
   {
                   s1="3";
                s2=s2+s1;correct[pm]=s1;pm++;  
   }
  if(e.getSource()==b4)
   {
                   s1="4";
                s2=s2+s1;correct[pm]=s1;pm++;  
   }
   
  if(e.getSource()==b5)
   {
                   s1="5";
                s2=s2+s1;correct[pm]=s1;pm++;  
   }

  if(e.getSource()==b6)
   {
                   s1="6";
                s2=s2+s1;correct[pm]=s1;pm++;  
   }

  if(e.getSource()==b7)
   {
                   s1="7";
                s2=s2+s1;correct[pm]=s1;pm++;  
   }

  if(e.getSource()==b8)
   {
                   s1="8";
                s2=s2+s1;correct[pm]=s1;pm++;  
   }

  if(e.getSource()==b9)
   {
                   s1="9";
                s2=s2+s1;correct[pm]=s1;pm++;  
   }

  if(e.getSource()==dz)
   {
                   s1="00";
                s2=s2+s1;
   correct[pm]=s1;
   pm++;  
   }

  if(e.getSource()==point)
   {
                   s1=".";
                s2=s2+s1;
   correct[pm]=s1;pm++;  
   }
 
 

   tf.setText(s2);
 
 


//*************************************** Begain AC Button************************************************************************************
     if(e.getSource()==ac)
  {
   k3=0;
   k2=0;
   tf.setText("0");
   s2="";
   pm=0;
   check.setText("Replay");
   cdk=0;
   bn=0;
   gtt=0;
   rm=0;
    for(int hj=0;hj<100;hj++)
     {
     chk[hj]="";
     }
  }
//*******************************BeGAIN CANCEL BUTTON************************************************************************
   if(e.getSource()==can)
  {
  tf.setText("0");s2="";pm=0;
  }                  
 
//******************************  Begain Correct Button  ********************************************************************************************
 if(e.getSource()==corr)
  {   
  pm=pm-1;s2="";

    for(dc=0;dc<pm; dc++)
    {
     s2=s2+correct[dc];
    }
  tf.setText(s2);
  } 
//******************************* Begain Plus Button*************************************************************************************
 if(e.getSource()==plus)
  {
     if(k4==12 && s2=="")
    {
    s2=s4;k4=0;
    }
 
  chk[cdk]="+ " +s2;cdk++;
  k1=Double.parseDouble(s2);
  s2=""; 
     if(mid==2)
     {
    k2=k2-k1;
     } 
 
    if(mid==3)
     {
    k2=k2*k1;
     } 

    if(mid==4)
     {
    k2=k2/k1;
     } 
  
                  if(k3==0||mid==1)
    {  
                  k2=k2+k1;
     k3=5;
    }

  tf.setText(""+k2);
  mid=1;
  pm=0; 
  }

//***********************************BEGAIN OF MINUS BUTTON****************************************************************
 if(e.getSource()==min)
  {
   if(k4==12 && s2=="")
   {
   s2=s4;k4=0;
   }

   chk[cdk]="- " +s2;cdk++;
   k1=Double.parseDouble(s2);
   s2=""; 
    if(mid==1)
    {
   k2=k2+k1;
    } 
 
   if(mid==3)
    {
   k2=k2*k1;
    } 

   if(mid==4)
    {
   k2=k2/k1;
    } 


                  if(k3==0||mid==2)
   {
      if(k3==0)
                         {
    k2=k2+k1;k3=5;
    }
    else
    {
    k2=k2-k1;
    } 
            
   }

                tf.setText(""+k2);
  mid=2;
  pm=0; 
  }
//*********************************BEGAIN OF MULT BUTTON*****************************************************************
  if(e.getSource()==mul)
  {

   if(k4==12 && s2=="")
   {
   s2=s4;k4=0;
   }


  chk[cdk]="* " +s2;cdk++;
  k1=Double.parseDouble(s2);
  s2=""; 
    if(mid==1)
    {
   k2=k2+k1;
    } 
 
   if(mid==2)
    {
   k2=k2-k1;
    } 

   if(mid==4)
    {
   k2=k2/k1;
    } 


                  if(k3==0||mid==3)
    {
     if(k3==0)
                           {
     k2=k2+k1;
     k3=5;
     }
     else
     {
     k2=k2*k1;
     } 
            
    }
                tf.setText(""+k2);
  mid=3;
  pm=0; 
  }
//*******************************Begain OF divion botton********************************************************************
  if(e.getSource()==div)
  {
   if(k4==12 && s2=="")
   {
   s2=s4;k4=0;
   }
   chk[cdk]="/ " +s2;cdk++;
   k1=Double.parseDouble(s2);
   s2=""; 
    if(mid==1)
    {
   k2=k2+k1;
    } 
 
   if(mid==2)
    {
   k2=k2-k1;
    } 

   if(mid==3)
    {
   k2=k2*k1;
    } 


                  if(k3==0||mid==4)
   {
    if(k3==0)
                         {
    k2=k2+k1;
    k3=5;
    }
    else
    {
    k2=k2/k1;
    } 
            
   }
                tf.setText(""+k2);
  mid=4;
  pm=0;
  }
//********************************Begain Of equal button*****************************************************************
  if(e.getSource()==eq)
  {
  chk[cdk]="= " +s2;cdk++;
  k1=Double.parseDouble(s2);
  s2=""; 
    if(mid==1)
    {
   k2=k2+k1;
    } 
 
   if(mid==2)
    {
   k2=k2-k1;
    } 

   if(mid==4)
    {
   k2=k2/k1;
    } 


                  if(mid==3)
   {
   k2=k2*k1; 
    }
  
  
                tf.setText(""+k2);
  chk[cdk]="ANS IS : " +k2;
  cdk++;
  mid=25;
  rm=k2;
  s4=""+k2;
  k2=0;
  k3=0;
  pm=0;  
  D3=5; 
  k4=12;
  d4=5; 
  }
//***********************************Begain Of Persentage button************************************************************************    
                if(e.getSource()==per)
  {
  chk[cdk]="% "+s2;
  cdk++;
  k1=Double.parseDouble(s2);
  s2=""; 
    if(mid==1)
    {
   k2=k2+(k2*(k1/100));
    } 
 
   if(mid==2)
    {
   k2=k2-(k2*(k1/100));
    } 

   if(mid==4)
    {
   k2=k2*(k1/100);
    } 


                  if(k3==0||mid==3)
   {
    if(k3==0)
                         {
    k2=0;
    k3=5;
    }
    else
    {
    k2=k2*(k1/100);
    } 
            
   }
                tf.setText(""+k2);
  mid=40;
  pm=0;
  s4=""+k2;
  k2=0;
  k3=0;
  k4=12;
  }
//**********************************Begain Of Replay button***************************************************************************
 
 if(e.getSource()==check)
  {
  tf.setText(chk[bn]);
  bn++;
  check.setText("Rep:"+bn);
  if(cdk==bn)
  {
  bn=0;
   if(D3==5)
   {
   check.setText("Ans");
   }
   }  


  }

  if(cdk==0)
  {
  check.setText("Replay");
  }  

//*****************************Add in GT by Pressing '=' button*****************************************************************


 if(d4==5)
 {

 gtt=gtt+rm;
 d4=0;

 }

//******************************Begain of grand totel Button************************************************

 if(e.getSource()==gt)
 {
 tf.setText(""+gtt);
 }
//***********************end of event methord *************************************

 }
//****************** begin display methord***************************************************
 public void display()
 {
 date =new Date();
 calendar=new GregorianCalendar();
 calendar.setTime(date);
 strTime=calendar.get(Calendar.HOUR)+":"+calendar.get(Calendar.MINUTE)+":"+calendar.get(Calendar.SECOND);
 strDate=(calendar.get(Calendar.MONTH)+1)+"/"+calendar.get(Calendar.DATE)+"/"+calendar.get(Calendar.YEAR);
 strStatus=strTime+"      "+strDate;
 l1.setText(strStatus);
 }

 public void nameop()
 {
 s5=s5+named[n1];
 l2.setText("                 "+s5);
 if(n1==31)
 {
 n1=-1;s5="";
 }
 ++n1;
 }
//***********************Begain of run methord****************************************

 public void run()
 {

  while(datimeThread !=null)
  { 
 display();nameop();
 
   try
   {

    datimeThread.sleep(300);
   tname.sleep(100);
   }
   catch(InterruptedException e)
   {
   System.out.println("Thread interrupted");
   }
  }

 }
//**************************End of run methord******************************************

}
//********************End of Calculator1 class**********************************

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import java.util.*;
import java.awt.event.*;
import javax.swing.*;
public class calculator1 implements ActionListener Runnable
{
JLabel l1 l2;
String s1 "" s2 "" s3 "" s4 "" s5 "";
String correct[] {"" "" "" "" "" "" "" "" "" ""};
String named[] {"C" "r" "e" "a" "t" "e" "d" " " "By" " " "B" "H" "A" "S" "K" "A" R" " " "C" "H" "A" "U" "H" "A" "A" "N" " " " " " " " " " " " " " " " " " " " "};
String chk[] new String[100];
int mid 40 pm 0 dc 0 cdk 0 bn 0 D3 0 k4 0 d4 5 n1 0;
double k1 0 k2 0 rm 0 k3 0 gtt 0;
JFrame f1;
Thread datimeThread tname;
Date date;
GregorianCalendar calendar;
String strDate strTime strStatus;
JPanel p1;
JTextField tf;
JButton b0;
JButton b1;
JButton b2;
JButton b3;
JButton b4;
JButton b5;
JButton b6;
JButton b7;
JButton b8;
JButton b9;
JButton plus;
JButton min;
JButton div;
JButton mul;
JButton per;
JButton point;
JButton ac;
JButton can;
JButton corr;
JButton dz;
JButton eq;
JButton check;
JButton gt;
//*************************************************************************************************
calculator1()
{
f1 new JFrame("Calculator");
p1 new JPanel();
tf new JTextField(15);
b0 new JButton("0");
b1 new JButton("1");
b2 new JButton("2");
b3 new JButton("3");
b4 new JButton("4");
b5 new JButton("5");
b6 new JButton("6");
b7 new JButton("7");
b8 new JButton("8");
b9 new JButton("9");
plus new JButton("+");
min new JButton("-");
div new JButton("/");
mul new JButton("*");
per new JButton(" ");
point new JButton(".");
ac new JButton("AC");
can new JButton("C");
corr new JButton(" Correct ");
dz new JButton("00");
eq new JButton(" ");
check new JButton("Replay");
gt new JButton("GT");
l1 new JLabel("");
l2 new JLabel("");
ac.setForeground(Color.red);
can.setForeground(Color.red);
corr.setForeground(Color.blue);
gt.setForeground(Color.blue);

p1.add("East" l2);
p1.add(tf);
p1.add(ac);
p1.add(can);
p1.add(check);
p1.add(corr);
p1.add(b1);
p1.add(b2);
p1.add(b3);
p1.add(b4);
p1.add(b5);
p1.add(b6);
p1.add(b7);
p1.add(b8);
p1.add(b9);
p1.add(b0);
p1.add(dz);
p1.add(plus);
p1.add(min);
p1.add(div);
p1.add(mul);
p1.add(per);
p1.add(point);
p1.add(gt);
p1.add(eq);
tf.setText("0");
p1.add(l1);

b0.addActionListener(this);
b1.addActionListener(this);
b2.addActionListener(this);
b3.addActionListener(this);
b4.addActionListener(this);
b5.addActionListener(this);
b6.addActionListener(this);
b7.addActionListener(this);
b8.addActionListener(this);
b9.addActionListener(this);
dz.addActionListener(this);
min.addActionListener(this);
div.addActionListener(this);
per.addActionListener(this);
mul.addActionListener(this);
eq.addActionListener(this);
plus.addActionListener(this);
point.addActionListener(this);
corr.addActionListener(this);
ac.addActionListener(this);
can.addActionListener(this);
gt.addActionListener(this);
datimeThread new Thread(this);
check.addActionListener(this);
datimeThread new Thread(this);
datimeThread.start();
tname new Thread(this);
tname.start();
f1.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
f1.getContentPane().add(p1);
f1.setResizable(false);
f1.setSize(210 325);
f1.setVisible(true);
}
//*************************** END OF CONTRUCTOR ****************************************
public static void main(String args[])
{
calculator1 app new calculator1();
}

//**************************** END OF MAIN begain of action per *******************************************
public void actionPerformed(ActionEvent e)
{
if(e.getSource() b0)
{
s1 "0";
s2 s2+s1;
correct[pm] s1;pm++;
}
if(e.getSource() b1)
{
s1 "1";
s2 s2+s1;correct[pm] s1;pm++;
}
if(e.getSource() b2)
{
s1 "2";
s2 s2+s1;correct[pm] s1;pm++;
}
if(e.getSource() b3)
{
s1 "3";
s2 s2+s1;correct[pm] s1;pm++;
}
if(e.getSource() b4)
{
s1 "4";
s2 s2+s1;correct[pm] s1;pm++;
}

if(e.getSource() b5)
{
s1 "5";
s2 s2+s1;correct[pm] s1;pm++;
}
if(e.getSource() b6)
{
s1 "6";
s2 s2+s1;correct[pm] s1;pm++;
}
if(e.getSource() b7)
{
s1 "7";
s2 s2+s1;correct[pm] s1;pm++;
}
if(e.getSource() b8)
{
s1 "8";
s2 s2+s1;correct[pm] s1;pm++;
}
if(e.getSource() b9)
{
s1 "9";
s2 s2+s1;correct[pm] s1;pm++;
}
if(e.getSource() dz)
{
s1 "00";
s2 s2+s1;
correct[pm] s1;
pm++;
}
if(e.getSource() point)
{
s1 ".";
s2 s2+s1;
correct[pm] s1;pm++;
}
tf.setText(s2); 

//*************************************** Begain AC Button************************************************************************************
if(e.getSource() ac)
{
k3 0;
k2 0;
tf.setText("0");
s2 "";
pm 0;
check.setText("Replay");
cdk 0;
bn 0;
gtt 0;
rm 0;
for(int hj 0;hj<100;hj++)
{
chk[hj] "";
}
}
//*******************************BeGAIN CANCEL BUTTON************************************************************************
if(e.getSource() can)
{
tf.setText("0");s2 "";pm 0;
}

//****************************** Begain Correct Button ********************************************************************************************
if(e.getSource() corr)
{
pm pm-1;s2 "";

for(dc 0;dc<pm; dc++)
{
s2 s2+correct[dc];
}
tf.setText(s2);
}
//******************************* Begain Plus Button*************************************************************************************
if(e.getSource() plus)
{
if(k4 12 && s2 "")
{
s2 s4;k4 0;
}

chk[cdk] "+ " +s2;cdk++;
k1 Double.parseDouble(s2);
s2 "";
if(mid 2)
{
k2 k2-k1;
}

if(mid 3)
{
k2 k2*k1;
}
if(mid 4)
{
k2 k2/k1;
}

if(k3 0||mid 1)
{
k2 k2+k1;
k3 5;
}
tf.setText(""+k2);
mid 1;
pm 0;
}
//***********************************BEGAIN OF MINUS BUTTON****************************************************************
if(e.getSource() min)
{
if(k4 12 && s2 "")
{
s2 s4;k4 0;
}
chk[cdk] "- " +s2;cdk++;
k1 Double.parseDouble(s2);
s2 "";
if(mid 1)
{
k2 k2+k1;
}

if(mid 3)
{
k2 k2*k1;
}
if(mid 4)
{
k2 k2/k1;
}

if(k3 0||mid 2)
{
if(k3 0)
{
k2 k2+k1;k3 5;
}
else

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