Calculator with both Standard and Scientific Mode - Beginners / Lab Assignments Source Code in Java

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Home » Java Home » Beginners / Lab Assignments Home » Calculator with both Standard and Scientific Mode

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Title	Calculator with both Standard and Scientific Mode
Author	K.Ramesh
Author Email	ramesh_cdm [at] hotmail.com
Description	This is calculator program. You can select either standard or scientific mode.
Category	Java » Beginners / Lab Assignments
Hits	391900
Code	Select and Copy the Code
import java.awt.; import java.awt.event.; import javax.swing.; import javax.swing.event.; public class calculator extends JFrame implements ActionListener { JTextField jtx; double temp,temp1,result,a; static double m1,m2; int k=1,x=0,y=0,z=0; char ch; JButton one,two,three,four,five,six,seven,eight,nine,zero,clr,pow2,pow3,exp; JButton plus,min,div,lg,rec,mul,eq,plmi,poin,mr,mc,mp,mm,sqrt,sin,cos,tan; JMenuBar bar; JMenu view; JMenuItem exit; JRadioButtonMenuItem standard,scientific; JSeparator jp; ButtonGroup bg; Container cont; JPanel textPanel,syntpanel,buttonpanel; calculator() { cont=getContentPane(); cont.setLayout(new BorderLayout()); JPanel textpanel=new JPanel(); Font font=new Font("Arial",Font.PLAIN,18); jtx=new JTextField(25); jtx.setFont(font); jtx.setHorizontalAlignment(SwingConstants.RIGHT); jtx.addKeyListener(new KeyAdapter() { public void keyTyped(KeyEvent keyevent) { char c=keyevent.getKeyChar(); if(c>='0' && c<='9') { } else { keyevent.consume(); } } }); textpanel.add(jtx); buttonpanel=new JPanel(); buttonpanel.setLayout(new GridLayout(5,4,2,2)); boolean t=true; syntpanel=new JPanel(); syntpanel.setLayout(new GridLayout(5,1)); bar=new JMenuBar(); view=new JMenu("View"); standard =new JRadioButtonMenuItem("Standard",true); standard.setMnemonic('S'); standard.addItemListener(new radiohandler()); scientific =new JRadioButtonMenuItem("Sceintific"); standard.setMnemonic('c'); scientific.addItemListener(new radiohandler()); jp=new JSeparator(); exit=new JMenuItem("Exit"); standard.setMnemonic('E'); exit.addActionListener(this); bg=new ButtonGroup(); bg.add(standard); bg.add(scientific); view.add(standard); view.add(scientific); view.add(jp); view.add(exit); bar.add(view); setJMenuBar(bar); mr=new JButton("MR"); buttonpanel.add(mr); mr.addActionListener(this); seven=new JButton("7"); buttonpanel.add(seven); seven.addActionListener(this); eight=new JButton("8"); buttonpanel.add(eight); eight.addActionListener(this); nine=new JButton("9"); buttonpanel.add(nine); nine.addActionListener(this); clr=new JButton("AC"); buttonpanel.add(clr); clr.addActionListener(this); mc=new JButton("MC"); buttonpanel.add(mc); mc.addActionListener(this); four=new JButton("4"); buttonpanel.add(four); four.addActionListener(this); five=new JButton("5"); buttonpanel.add(five); five.addActionListener(this); six=new JButton("6"); buttonpanel.add(six); six.addActionListener(this); mul=new JButton(""); buttonpanel.add(mul); mul.addActionListener(this); mp=new JButton("M+"); buttonpanel.add(mp); mp.addActionListener(this); one=new JButton("1"); buttonpanel.add(one); one.addActionListener(this); two=new JButton("2"); buttonpanel.add(two); two.addActionListener(this); three=new JButton("3"); buttonpanel.add(three); three.addActionListener(this); min=new JButton("-"); buttonpanel.add(min); min.addActionListener(this); mm=new JButton("M-"); buttonpanel.add(mm); mm.addActionListener(this); zero=new JButton("0"); buttonpanel.add(zero); zero.addActionListener(this); plmi=new JButton("+/-"); buttonpanel.add(plmi); plmi.addActionListener(this); poin=new JButton("."); buttonpanel.add(poin); poin.addActionListener(this); plus=new JButton("+"); buttonpanel.add(plus); plus.addActionListener(this); rec=new JButton("1/x"); buttonpanel.add(rec); rec.addActionListener(this); sqrt=new JButton("Sqrt"); buttonpanel.add(sqrt); sqrt.addActionListener(this); lg=new JButton("log"); buttonpanel.add(lg); lg.addActionListener(this); div=new JButton("/"); div.addActionListener(this); buttonpanel.add(div); eq=new JButton("="); buttonpanel.add(eq); eq.addActionListener(this); sin=new JButton("SIN"); syntpanel.add(sin); sin.addActionListener(this); cos=new JButton("COS"); syntpanel.add(cos); cos.addActionListener(this); tan=new JButton("TAN"); syntpanel.add(tan); tan.addActionListener(this); pow2=new JButton("x^2"); syntpanel.add(pow2); pow2.addActionListener(this); pow3=new JButton("x^3"); syntpanel.add(pow3); pow3.addActionListener(this); exp=new JButton("Exp"); exp.addActionListener(this); cont.add("Center",buttonpanel); cont.add("North",textpanel); setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); } class radiohandler implements ItemListener { public void itemStateChanged(ItemEvent ie) { AbstractButton button=(AbstractButton)ie.getItem(); String label=button.getText(); { if(label.equals("Standard")) { cont.remove(syntpanel); validate(); } if(label.equals("Sceintific")) { cont.add("West",syntpanel); validate(); } } } } public void actionPerformed(ActionEvent e) { String s=e.getActionCommand(); if(s.equals("Exit")) { System.exit(0); } if(s.equals("1")) { if(z==0) { jtx.setText(jtx.getText()+"1"); } else { jtx.setText(""); jtx.setText(jtx.getText()+"1"); z=0; } } if(s.equals("2")) { if(z==0) { jtx.setText(jtx.getText()+"2"); } else { jtx.setText(""); jtx.setText(jtx.getText()+"2"); z=0; } } if(s.equals("3")) { if(z==0) { jtx.setText(jtx.getText()+"3"); } else { jtx.setText(""); jtx.setText(jtx.getText()+"3"); z=0; } } if(s.equals("4")) { if(z==0) { jtx.setText(jtx.getText()+"4"); } else { jtx.setText(""); jtx.setText(jtx.getText()+"4"); z=0; } } if(s.equals("5")) { if(z==0) { jtx.setText(jtx.getText()+"5"); } else { jtx.setText(""); jtx.setText(jtx.getText()+"5"); z=0; } } if(s.equals("6")) { if(z==0) { jtx.setText(jtx.getText()+"6"); } else { jtx.setText(""); jtx.setText(jtx.getText()+"6"); z=0; } } if(s.equals("7")) { if(z==0) { jtx.setText(jtx.getText()+"7"); } else { jtx.setText(""); jtx.setText(jtx.getText()+"7"); z=0; } } if(s.equals("8")) { if(z==0) { jtx.setText(jtx.getText()+"8"); } else { jtx.setText(""); jtx.setText(jtx.getText()+"8"); z=0; } } if(s.equals("9")) { if(z==0) { jtx.setText(jtx.getText()+"9"); } else { jtx.setText(""); jtx.setText(jtx.getText()+"9"); z=0; } } if(s.equals("0")) { if(z==0) { jtx.setText(jtx.getText()+"0"); } else { jtx.setText(""); jtx.setText(jtx.getText()+"0"); z=0; } } if(s.equals("AC")) { jtx.setText(""); x=0; y=0; z=0; } if(s.equals("log")) { if(jtx.getText().equals("")) { jtx.setText(""); } else { a=Math.log(Double.parseDouble(jtx.getText())); jtx.setText(""); jtx.setText(jtx.getText() + a); } } if(s.equals("1/x")) { if(jtx.getText().equals("")) { jtx.setText(""); } else { a=1/Double.parseDouble(jtx.getText()); jtx.setText(""); jtx.setText(jtx.getText() + a); } } if(s.equals("Exp")) { if(jtx.getText().equals("")) { jtx.setText(""); } else { a=Math.exp(Double.parseDouble(jtx.getText())); jtx.setText(""); jtx.setText(jtx.getText() + a); } } if(s.equals("x^2")) { if(jtx.getText().equals("")) { jtx.setText(""); } else { a=Math.pow(Double.parseDouble(jtx.getText()),2); jtx.setText(""); jtx.setText(jtx.getText() + a); } } if(s.equals("x^3")) { if(jtx.getText().equals("")) { jtx.setText(""); } else { a=Math.pow(Double.parseDouble(jtx.getText()),3); jtx.setText(""); jtx.setText(jtx.getText() + a); } } if(s.equals("+/-")) { if(x==0) { jtx.setText("-"+jtx.getText()); x=1; } else { jtx.setText(jtx.getText()); } } if(s.equals(".")) { if(y==0) { jtx.setText(jtx.getText()+"."); y=1; } else { jtx.setText(jtx.getText()); } } if(s.equals("+")) { if(jtx.getText().equals("")) { jtx.setText(""); temp=0; ch='+'; } else { temp=Double.parseDouble(jtx.getText()); jtx.setText(""); ch='+'; y=0; x=0; } jtx.requestFocus(); } if(s.equals("-")) { if(jtx.getText().equals("")) { jtx.setText(""); temp=0; ch='-'; } else { x=0; y=0; temp=Double.parseDouble(jtx.getText()); jtx.setText(""); ch='-'; } jtx.requestFocus(); } if(s.equals("/")) { if(jtx.getText().equals("")) { jtx.setText(""); temp=1; ch='/'; } else { x=0; y=0; temp=Double.parseDouble(jtx.getText()); ch='/'; jtx.setText(""); } jtx.requestFocus(); } if(s.equals("")) { if(jtx.getText().equals("")) { jtx.setText(""); temp=1; ch=''; } else { x=0; y=0; temp=Double.parseDouble(jtx.getText()); ch=''; jtx.setText(""); } jtx.requestFocus(); } if(s.equals("MC")) { m1=0; jtx.setText(""); } if(s.equals("MR")) { jtx.setText(""); jtx.setText(jtx.getText() + m1); } if(s.equals("M+")) { if(k==1) { m1=Double.parseDouble(jtx.getText()); k++; } else { m1+=Double.parseDouble(jtx.getText()); jtx.setText(""+m1); } } if(s.equals("M-")) { if(k==1) { m1=Double.parseDouble(jtx.getText()); k++; } else { m1-=Double.parseDouble(jtx.getText()); jtx.setText(""+m1); } } if(s.equals("Sqrt")) { if(jtx.getText().equals("")) { jtx.setText(""); } else { a=Math.sqrt(Double.parseDouble(jtx.getText())); jtx.setText(""); jtx.setText(jtx.getText() + a); } } if(s.equals("SIN")) { if(jtx.getText().equals("")) { jtx.setText(""); } else { a=Math.sin(Double.parseDouble(jtx.getText())); jtx.setText(""); jtx.setText(jtx.getText() + a); } } if(s.equals("COS")) { if(jtx.getText().equals("")) { jtx.setText(""); } else { a=Math.cos(Double.parseDouble(jtx.getText())); jtx.setText(""); jtx.setText(jtx.getText() + a); } } if(s.equals("TAN")) { if(jtx.getText().equals("")) { jtx.setText(""); } else { a=Math.tan(Double.parseDouble(jtx.getText())); jtx.setText(""); jtx.setText(jtx.getText() + a); } } if(s.equals("=")) { if(jtx.getText().equals("")) { jtx.setText(""); } else { temp1 = Double.parseDouble(jtx.getText()); switch(ch) { case '+': result=temp+temp1; break; case '-': result=temp-temp1; break; case '/': result=temp/temp1; break; case '': result=temptemp1; break; } jtx.setText(""); jtx.setText(jtx.getText() + result); z=1; } } jtx.requestFocus(); } public static void main(String args[]) { calculator n=new calculator(); n.setTitle("CALCULATOR"); n.setSize(370,250); n.setResizable(false); n.setVisible(true); } }

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