JTextField? I just started learning Java about a month ago

Thank you, actually that's what I though. I'm getting some errors though

Can you look at the code and tell me what's wrong. thanks again.

import java.awt.*;

import java.awt.event.*;

import javax.swing.*;

class StudentTracker extends JFrame { // create a class of type JFrame

JTextField SsnField, FirstNameField, LastNameField, Test1Field, Test2Field,

Test3Field, HomeworkField, FinalTestField, prompt;

int finalGrade, test1Grade, test2Grade, test3Grade, finaltestGrade,homeworkGrade ;

JTextArea outputTextArea = new JTextArea();

public StudentTracker(String title) // constructor method - initializes object

{

super (title); // set window title

Container c;

addWindowListener(new WindowAdapter() // handle window being closed by clicking on x box

{

public void windowClosing(WindowEvent e)

{

dispose();

System.exit(0); // terminate normally

}

});

c = getContentPane();

c.setLayout(new GridLayout(10,2)); // set window up as a 3x3 grid

c.add(new JLabel("Enter Students SSN"));

SsnField = new JTextField ("");

SsnField.selectAll (); // select text for overtyping

c.add(SsnField);

c.add(new JLabel("First Name"));

FirstNameField = new JTextField ("");

FirstNameField.selectAll (); // select text for overtyping

c.add(FirstNameField);

c.add(new JLabel("Last Name"));

LastNameField = new JTextField ("");

LastNameField.selectAll (); // select text for overtyping

c.add(LastNameField);

c.add(new JLabel("Test #1 Score"));

Test1Field = new JTextField ("");

Test1Field.selectAll ();

c.add(Test1Field);

c.add(new JLabel("Test #2 Score"));

Test2Field = new JTextField ("");

Test2Field.selectAll ();

c.add(Test2Field);

c.add(new JLabel("Test #3 Score"));

Test3Field = new JTextField ("");

Test3Field.selectAll ();

c.add(Test3Field);

c.add(new JLabel("Homeworkd Score"));

HomeworkField = new JTextField ("");

HomeworkField.selectAll ();

c.add(HomeworkField);

c.add(new JLabel("Final Test Score"));

FinalTestField = new JTextField ("");

FinalTestField.selectAll ();

c.add(FinalTestField);

JButton calculateButton = new JButton ("Calculate Grade");

calculateButton.addActionListener (new MyActionListener());

c.add (calculateButton);

JButton nextButton = new JButton ("Next Student");

nextButton.addActionListener (new MyActionListener()); // prepare button for event handling

c.add (nextButton);

JButton exitButton = new JButton ("Exit");

exitButton.addActionListener (new MyActionListener());

c.add (exitButton);

JButton displayButton = new JButton ("Display");

displayButton.addActionListener (new MyActionListener());

c.add (displayButton);

test1Grade = Integer.parseInt(Test1Field);

test2Grade = Integer.parseInt(Test2Field);

test3Grade = Integer.parseInt(Test3Field);

homeworkGrade = Integer.parseInt(HomeworkField);

finaltestGrade = Integer.parseInt(FinalTestField);

finalGrade = (test1Grade + test2Grade + test3Grade + homeworkGrade)/4;

pack(); // shrink window to miniminum size needed

setVisible(true); // make window visible

}

public static void main(String args[]) // program entry point

{

System.out.println("...Initializing Student Tracker...");

StudentTracker mainWindow = new StudentTracker("Student Tracker v1.0"); // create new object of class SimpleGreeting

}

class MyActionListener implements ActionListener { //inner class to handle button event

public void actionPerformed(ActionEvent evt) {

outputTextArea.setText();

outputTextArea.append( "" );

// if (evt.getActionCommand ().equals("Display")) // determine //origin of event

//JOptionPane.showMessageDialog ( //null,outputTextArea ,"Display",JOptionPane.INFORMATION_MESSAGE );

//JOptionPane.showMessageDialog (null,

// SsnField.getText() + FirstNameField.getText() + LastNameField.getText() + Test1Field.getText() + Test2Field.getText()

//+ Test3Field.getText() + HomeworkField.getText() + FinalTestField.getText() , "You entered ...", JOptionPane.INFORMATION_MESSAGE);

if (evt.getActionCommand ().equals("Calculate Grade"))

JOptionPane.showMessageDialog ( null,

+ finalGrade ,"Final Grade", JOptionPane.INFORMATION_MESSAGE);

else if (evt.getActionCommand ().equals("Exit"))

System.exit(0); // terminate program normally

}

}

}

idimaia at 2007-7-12 10:04:39 >

move you parsing and calculation stuff in actionPerformed method of MyActionListener

following code you will need to move :

test1Grade = Integer.parseInt(Test1Field.getText());

test2Grade = Integer.parseInt(Test2Field.getText());

test3Grade = Integer.parseInt(Test3Field.getText());

homeworkGrade = Integer.parseInt(HomeworkField.getText());

finaltestGrade = Integer.parseInt(FinalTestField.getText());

finalGrade = (test1Grade + test2Grade + test3Grade + homeworkGrade)/4;

vikramthakura at 2007-7-12 10:04:39 >

Following change should place ur window in center

public static void main(String args[]) // program entry point

{

System.out.println("...Initializing Student Tracker...");

StudentTracker mainWindow = new StudentTracker("Student Tracker v1.0"); // create new object of class SimpleGreeting

Toolkit tk = Toolkit.getDefaultToolkit();

Dimension dm = tk.getScreenSize();

mainWindow.setSize(250,300);

mainWindow.setLocation( dm.width /2-150, dm.height/2 -150);

}

I am not very sure how you are going to do the display thing. You dont want to store the data ? If you dont want to store the data then you can write your own implementation for storing it in memory and if you want to store it then use some file objects for storing.

Let me know if you have any more queries

vikramthakura at 2007-7-12 10:04:39 >