It is becoming frustrating. Somebody help me!!!!

> stop shouting and crying...

> camickr gave you an answer yesterday...

>

> and for your exception, everything is said:

> java.lang.NumberFormatException: For input string:

> "5n!"

> incremented code: line 107

This was my earlier attempt:

public void actionPerformed(ActionEvent ae)

{if (jTfd.replaceSelection( jbtn.getActionCommand() )=="n!")

{

int num= Integer.parseInt(jTfd.getText());

int i;

long fact=1;

for(i=1; i<=num; i++)

{

fact *=i;

}

jTfd.setText(String.valueOf(fact));

}

else

JButton jbtn = (JButton)ae.getSource();

jTfd.replaceSelection( jbtn.getActionCommand() );

}

it gave me the following error messages:

java:116 not a statement JButton jbtn=(JButton)ae.getsource();

java:116 ';' expected JButton jbtn = (JButton)ae.getSource();

am confused

Camickr's Response:

> if (jTfd.replaceSelection( jbtn.getActionCommand() )=="n!")

What is this? Why are you using the replaceSelection() method here? Did you read the API to understand what the method does?

Next fix your code so that the formatting displays correctly. Sometimes you use tabs and sometimes you use spaces to indent each new line. So the formatting on the forum shows up strange.

Once you do this you might notice that you a missing an "{" for your else statement.

Finally, you don't use "==" to compare two objects. You use the equals(...) method.

I did realize that I left out an opening curly brace which i have corrected. Now here is my most recent attempt that i posted a while ago that gave me errors:

public void actionPerformed(ActionEvent ae)

{

JButton jbtn = (JButton)ae.getSource();

jTfd.replaceSelection( jbtn.getActionCommand() );

if (ae.getSource()==jbtnFT)

{

int num= Integer.parseInt(jTfd.getText());

int i;

long fact=1;

for(i=1; i<=num; i++)

{

fact *=i;

}

jTfd.setText(String.valueOf(fact));

}

}

If there is something that is eluding my grasp please point it out to me. It is not that I enjoying nagging. It is just that the more I try the more it eludes me that is what is getting to me.

bakesa at 2007-7-12 9:08:21 >

import java.awt.*;

import java.awt.event.*;

import javax.swing.*;

public class PanFrame extends JFrame implements ActionListener {

JTextField jTfd = new JTextField(20);

JButton jbtn7 = new JButton("7");

JButton jbtn8 = new JButton("8");

JButton jbtn9 = new JButton("9");

JButton jbtnFT = new JButton("n!");

JButton jbtn4 = new JButton("4");

JButton jbtn5 = new JButton("5");

JButton jbtn6 = new JButton("6");

JButton jbtn1 = new JButton("1");

JButton jbtn2 = new JButton("2");

JButton jbtn3 = new JButton("3");

JButton jbtn0 = new JButton("0");

JButton jbtnReset = new JButton("Reset");

public PanFrame(String title) {

super(title);

Panel pan1 = new Panel();

getContentPane().setLayout(new FlowLayout());

jTfd.setEditable(false);///////////////AVOID INCORRECT INPUT

pan1.add(jTfd);

Panel pan2 = new Panel();

getContentPane().setLayout(new GridLayout(4, 5, 2, 2));

pan2.add(jbtn7);

pan2.add(jbtn8);

pan2.add(jbtn9);

pan2.add(jbtnFT);

pan2.add(jbtn4);

pan2.add(jbtn5);

pan2.add(jbtn6);

pan2.add(jbtn0);

pan2.add(jbtn1);

pan2.add(jbtn2);

pan2.add(jbtn3);

pan2.add(jbtnReset);

getContentPane().add(pan1);

getContentPane().add(pan2);

// adding the Listener

jTfd.addActionListener(this);

jbtn7.addActionListener(this);

jbtn8.addActionListener(this);

jbtn9.addActionListener(this);

jbtnFT.addActionListener(this);

jbtn4.addActionListener(this);

jbtn5.addActionListener(this);

jbtn6.addActionListener(this);

jbtn1.addActionListener(this);

jbtn2.addActionListener(this);

jbtn3.addActionListener(this);

jbtn0.addActionListener(this);

jbtnReset.addActionListener(this);

validate();

}

public void actionPerformed(ActionEvent ae) {

JButton jbtn = (JButton) ae.getSource();

if (ae.getSource() == jbtnFT) {

try {

int num = Integer.parseInt(jTfd.getText());

if(num<25){///////AVOID OVERFLOW PROBLEMS

int i;

long fact = 1;

for (i = 1; i <= num; i++) {

fact *= i;

}

jTfd.setText(""+fact);

}else{

jTfd.setText("");

}

} catch (Exception e) {

jTfd.setText("");

}

}else if(ae.getSource()==jbtnReset){

jTfd.setText("");

}else{

jTfd.replaceSelection(jbtn.getActionCommand());

}

}

public static void main(String arg[]) {

PanFrame ObjFr = new PanFrame("Two Panel in One Frame");

ObjFr.setDefaultCloseOperation(EXIT_ON_CLOSE);

ObjFr.setSize(400, 400);

ObjFr.setVisible(true);

}

}

java_2006a at 2007-7-12 9:08:21 >