Add to Favorites    Make Home Page 28249 Online  
 Language Categories  
 Our Services  

Home » Java Home » GUI Home » Calculator Program in Java


Search Projects & Source Codes:

Title Calculator Program in Java
Author Sathish Kumar .S
Author Email mail2sathish [at]
Description This is a GUI oriented Simple Calculator program.
Category Java » GUI
Hits 229371
Code Select and Copy the Code
/** This is a simple calculator program can any one take and use. @author sathish_ssmca @param nothing */ import javax.swing.*; import javax.swing.JOptionPane; import java.awt.*; import java.awt.event.*; //<applet code=Calculator height=300 width=200></applet> public class Calculator extends JApplet { public void init() { CalculatorPanel calc=new CalculatorPanel(); getContentPane().add(calc); } } class CalculatorPanel extends JPanel implements ActionListener { JButton n1,n2,n3,n4,n5,n6,n7,n8,n9,n0,plus,minus,mul,div,dot,equal; static JTextField result=new JTextField("0",45); static String lastCommand=null; JOptionPane p=new JOptionPane(); double preRes=0,secVal=0,res; private static void assign(String no) { if((result.getText()).equals("0")) result.setText(no); else if(lastCommand=="=") { result.setText(no); lastCommand=null; } else result.setText(result.getText()+no); } public CalculatorPanel() { setLayout(new BorderLayout()); result.setEditable(false); result.setSize(300,200); add(result,BorderLayout.NORTH); JPanel panel=new JPanel(); panel.setLayout(new GridLayout(4,4)); n7=new JButton("7"); panel.add(n7); n7.addActionListener(this); n8=new JButton("8"); panel.add(n8); n8.addActionListener(this); n9=new JButton("9"); panel.add(n9); n9.addActionListener(this); div=new JButton("/"); panel.add(div); div.addActionListener(this); n4=new JButton("4"); panel.add(n4); n4.addActionListener(this); n5=new JButton("5"); panel.add(n5); n5.addActionListener(this); n6=new JButton("6"); panel.add(n6); n6.addActionListener(this); mul=new JButton("*"); panel.add(mul); mul.addActionListener(this); n1=new JButton("1"); panel.add(n1); n1.addActionListener(this); n2=new JButton("2"); panel.add(n2); n2.addActionListener(this); n3=new JButton("3"); panel.add(n3); n3.addActionListener(this); minus=new JButton("-"); panel.add(minus); minus.addActionListener(this); dot=new JButton("."); panel.add(dot); dot.addActionListener(this); n0=new JButton("0"); panel.add(n0); n0.addActionListener(this); equal=new JButton("="); panel.add(equal); equal.addActionListener(this); plus=new JButton("+"); panel.add(plus); plus.addActionListener(this); add(panel,BorderLayout.CENTER); } public void actionPerformed(ActionEvent ae) { if(ae.getSource()==n1) assign("1"); else if(ae.getSource()==n2) assign("2"); else if(ae.getSource()==n3) assign("3"); else if(ae.getSource()==n4) assign("4"); else if(ae.getSource()==n5) assign("5"); else if(ae.getSource()==n6) assign("6"); else if(ae.getSource()==n7) assign("7"); else if(ae.getSource()==n8) assign("8"); else if(ae.getSource()==n9) assign("9"); else if(ae.getSource()==n0) assign("0"); else if(ae.getSource()==dot) { if(((result.getText()).indexOf("."))==-1) result.setText(result.getText()+"."); } else if(ae.getSource()==minus) { preRes=Double.parseDouble(result.getText()); lastCommand="-"; result.setText("0"); } else if(ae.getSource()==div) { preRes=Double.parseDouble(result.getText()); lastCommand="/"; result.setText("0"); } else if(ae.getSource()==equal) { secVal=Double.parseDouble(result.getText()); if(lastCommand.equals("/")) res=preRes/secVal; else if(lastCommand.equals("*")) res=preRes*secVal; else if(lastCommand.equals("-")) res=preRes-secVal; else if(lastCommand.equals("+")) res=preRes+secVal; result.setText(" "+res); lastCommand="="; } else if(ae.getSource()==mul) { preRes=Double.parseDouble(result.getText()); lastCommand="*"; result.setText("0"); } else if(ae.getSource()==plus) { preRes=Double.parseDouble(result.getText()); lastCommand="+"; result.setText("0"); } } }

Related Source Codes

Script Name Author
Sending mail Using JavaMail to Yahoo and Gmail accounts sai prasad
Simple Program in Java to Implement Multithreading Satish.K
Simple Calculator in Java Using Remote Method Invocation Satish.K
Guest Book Application Using Servlets Satish.K
String Manipulation Using Stringification Satish.K
String Manipulation Using Stringification Satish.K
Moving Ball Application Using Java Beans Satish.K
Rapid Roll game subrahmanyeswararao
student mgm arpan
Sourav Datta
Download Manager Sagar
Address Book in Java Rahul Chouhan
address book using java database connectivity(jdbc-msaccess) shekhar bansal
sun Steganography B.Rajavel
Connecting Java with MS-Access - Inserting data in Aseem


Google Groups Subscribe to SourceCodesWorld - Techies Talk

Free eBook - Interview Questions: Get over 1,000 Interview Questions in an eBook for free when you join JobsAssist. Just click on the button below to join JobsAssist and you will immediately receive the Free eBook with thousands of Interview Questions in an ebook when you join.

New! Click here to Add your Code!

ASP Home | C Home | C++ Home | COBOL Home | Java Home | Pascal Home
Source Codes Home Page


Google Search


Source Codes is a part of Vyom Network.

Vyom Network : Web Hosting | Dedicated Server | Free SMS, GRE, GMAT, MBA | Online Exams | Freshers Jobs | Software Downloads | Interview Questions | Jobs, Discussions | Placement Papers | Free eBooks | Free eBooks | Free Business Info | Interview Questions | Free Tutorials | Arabic, French, German | IAS Preparation | Jokes, Songs, Fun | Free Classifieds | Free Recipes | Free Downloads | Bangalore Info | Tech Solutions | Project Outsourcing, Web Hosting | GATE Preparation | MBA Preparation | SAP Info | Software Testing | Google Logo Maker | Freshers Jobs

Sitemap | Privacy Policy | Terms and Conditions
Copyright ©2003-2017, All Rights Reserved.
Page URL:

Download Yahoo Messenger | Placement Papers | Free SMS | C Interview Questions | C++ Interview Questions | Quick2Host Review