i write a code in java of GUI calculator. i handle its addition event only but it is not working i don't know why its code is here
import java.awt.*;
import javax.swing.*;
import java.awt.event.*;
class Calculator extends JFrame implements ActionListener{
JTextField jtext;
JPanel p;
JLabel lab;
JButton b1,b2,b3,b4,b5,b6,b7,b8,b9,b0,bPlus,bMinus,bMul,bPoint,bClear,bEqual;
public Calculator(){
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"));
bPlus=(new JButton("+"));
bMinus=(new JButton("-"));
bMul=(new JButton("*"));
bPoint=(new JButton("."));
bClear=(new JButton("C"));
bEqual=(new JButton("="));
jtext=new JTextField(15);
lab=new JLabel("My Calculator");
p=new JPanel(new GridLayout(4,4));
p.add(b1);
p.add(b2);
p.add(b3);
p.add(bClear);
p.add(b4);
p.add(b5);
p.add(b6);
p.add(bMul);
p.add(b7);
p.add(b8);
p.add(b9);
p.add(bMinus);
p.add(b0);
p.add(bPoint);
p.add(bPlus);
p.add(bEqual);
Container c=getContentPane();
c.setLayout(new BorderLayout());
c.add(p,BorderLayout.CENTER);
c.add(jtext,BorderLayout.NORTH);
c.add(lab,BorderLayout.SOUTH);
setTitle("Calculator");
setSize(400,400);
setLocationRelativeTo(null);
setVisible(true);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
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);
bPlus.addActionListener(this);
bMinus.addActionListener(this);
bMul.addActionListener(this);
bPoint.addActionListener(this);
bClear.addActionListener(this);
bEqual.addActionListener(this);
}
public static void main(String ss[]){
Calculator cal=new Calculator();
}
public void actionPerformed(ActionEvent e){
String result=" ";
String out[]=new String[2];
double res,num1,num2;
int counter=0;
if(e.getSource()==b0)
jtext.setText(jtext.getText() + "0");
else if(e.getSource()==b1)
jtext.setText(jtext.getText() + "1");
else if(e.getSource()==b2)
jtext.setText(jtext.getText() + "2");
else if(e.getSource()==b3)
jtext.setText(jtext.getText() + "3");
else if(e.getSource()==b4)
jtext.setText(jtext.getText() + "4");
else if(e.getSource()==b5)
jtext.setText(jtext.getText() + "5");
else if(e.getSource()==b6)
jtext.setText(jtext.getText() + "6");
else if(e.getSource()==b7)
jtext.setText(jtext.getText() + "7");
else if(e.getSource()==b8)
jtext.setText(jtext.getText() + "8");
else if(e.getSource()==b9)
jtext.setText(jtext.getText() + "9");
else if(e.getSource()==bPlus){
counter=1;
if(jtext.getText().contains("+"))
jtext.setText(jtext.getText());
else
jtext.setText(jtext.getText()+"+");
}
else if(e.getSource()==bMinus){
if(jtext.getText().contains("-"))
jtext.setText(jtext.getText());
else
jtext.setText(jtext.getText()+"-");
counter=2;
}
else if(e.getSource()==bMul){
if(jtext.getText().contains("*"))
jtext.setText(jtext.getText());
else
jtext.setText(jtext.getText()+"*");
counter=3;
}
else if(e.getSource()==bPoint){
if(jtext.getText().contains("."))
jtext.setText(jtext.getText());
else
jtext.setText(jtext.getText()+".");
}
else if(e.getSource()==bClear){
jtext.setText("");
counter=0;
result="";
res=0.0;
}
else if(e.getSource()==bEqual){
if(counter==1){
result=jtext.getText();
out=result.split("+");
num1=Double.parseDouble(out[0]);
num2=Double.parseDouble(out[1]);
res=num1+num2;
result=res+"";
}
jtext.setText(result);
}
}
}
when i click on equals button then it clears textfield why i don't know please help me tell me whats the problem
