Soucre code calculator Program Java.

Simple application to make a simple calculator program in java,
let's try in your Eclipse or Netbeans..

package kalkulator; import java.awt.*; import javax.swing.*; import java.awt.event.*; class Calculator1 implements ActionListener { int c,n; String s1,s2,s3,s4,s5; Frame f; JButton b1,b2,b3,b4,b5,b6,b7,b8,b9,b10,b11,b12,b13,b14,b15,b16; Panel p; TextField tf1; GridLayout gl; Calculator1() { f=new Frame("Calculator"); p=new Panel(); b1=new JButton("0"); b1.addActionListener(this); b2=new JButton("1"); b2.addActionListener(this); b3=new JButton("2"); b3.addActionListener(this); b4=new JButton("3"); b4.addActionListener(this); b5=new JButton("4"); b5.addActionListener(this); b6=new JButton("5"); b6.addActionListener(this); b7=new JButton("6"); b7.addActionListener(this); b8=new JButton("7"); b8.addActionListener(this); b9=new JButton("8"); b9.addActionListener(this); b10=new JButton("9"); b10.addActionListener(this); b11=new JButton("+"); b11.addActionListener(this); b12=new JButton("-"); b12.addActionListener(this); b13=new JButton("x"); b13.addActionListener(this); b14=new JButton("/"); b14.addActionListener(this); b15=new JButton("="); b15.addActionListener(this); b16=new JButton("A/C"); b16.addActionListener(this); tf1=new TextField(20); p.add(tf1); tf1.setBackground(Color.gray); gl=new GridLayout(4,4,10,20); p.setLayout(gl); p.add(b1);p.add(b2);p.add(b3);p.add(b4);p.add(b5);p.add(b6); p.add(b7);p.add(b8);p.add(b9);p.add(b10);p.add(b11); p.add(b12);p.add(b13);p.add(b14);p.add(b15);p.add(b16); f.add(p); f.setSize(100,200); f.setVisible(true); } public void actionPerformed(ActionEvent e) { if(e.getSource()==b1) { s3=tf1.getText(); s4="0"; s5=s3+s4; tf1.setText(s5); } if(e.getSource()==b2) { s3=tf1.getText(); s4="1"; s5=s3+s4; tf1.setText(s5); } if(e.getSource()==b3) { s3=tf1.getText(); s4="2"; s5=s3+s4; tf1.setText(s5); } if(e.getSource()==b4) { s3=tf1.getText(); s4="3"; s5=s3+s4; tf1.setText(s5); } if(e.getSource()==b5) { s3=tf1.getText(); s4="4"; s5=s3+s4; tf1.setText(s5); } if(e.getSource()==b6) { s3=tf1.getText(); s4="5"; s5=s3+s4; tf1.setText(s5); } if(e.getSource()==b7) { s3=tf1.getText(); s4="6"; s5=s3+s4; tf1.setText(s5); } if(e.getSource()==b8) { s3=tf1.getText(); s4="7"; s5=s3+s4; tf1.setText(s5); } if(e.getSource()==b9) { s3=tf1.getText(); s4="8"; s5=s3+s4; tf1.setText(s5); } if(e.getSource()==b10) { s3=tf1.getText(); s4="9"; s5=s3+s4; tf1.setText(s5); } if(e.getSource()==b11) { s1=tf1.getText(); tf1.setText(""); c=1; } if(e.getSource()==b12) { s1=tf1.getText(); tf1.setText(""); c=2; } if(e.getSource()==b13) { s1=tf1.getText(); tf1.setText(""); c=3; } if(e.getSource()==b14) { s1=tf1.getText(); tf1.setText(""); c=4; } if(e.getSource()==b15) { s2=tf1.getText(); if(c==1) { n=Integer.parseInt(s1)+Integer.parseInt(s2); tf1.setText(String.valueOf(n)); } else if(c==2) { n=Integer.parseInt(s1)-Integer.parseInt(s2); tf1.setText(String.valueOf(n)); } else if(c==3) { n=Integer.parseInt(s1)*Integer.parseInt(s2); tf1.setText(String.valueOf(n)); } else if(c==4) { n=Integer.parseInt(s1)/Integer.parseInt(s2); tf1.setText(String.valueOf(n)); } } if(e.getSource()==b16) { tf1.setText(""); } } public static void main(String args[]) { Calculator1 c=new Calculator1(); } }