Global Variables?

[mmcnitt]

Ok i'm really new at this so i apologize beforehand if i ask a stupid question or anything.

I'm working on a project that displays a GUI asking for a name as well as grades.
when you enter them all it runs the grades through a formula and opens another frame with the results. I don't need any help building the GUI what i need help on is I cannot for the life of me find out how to access the variable from another frame. Everything i've seen online tells me to set the variable outside the class but i need to run the formula inside because the grades come from the user.

Sorry if my code is messy, like i said i'm very new at this

// Loads all neccesary plugins
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

public class SInfo extends JPanel

{

// Setting all text fields, labels and button
public JButton submitInfo;

public JLabel SNamel, Asign, Asignl, Asign1l, Asign2l, Asign3l, Asign4l, Asign5l, Asign6l,
Asign7l, Asign8l, Asign9l, Asign10l, Folderl, Projectl, Project1l, Project2l, Project3l,
Project4l, GProjectl, blank, blank1, Sname, AsgnAvg, ProjectAvg, TotalAvg;

public JTextField SName, Asign1, Asign2, Asign3, Asign4, Asign5, Asign6,
Asign7, Asign8, Asign9, Asign10, Folder, Project1, Project2, Project3,
Project4, GProject;

double a1, a2, a3, a4, a5, a6, a7, a8, a9, a10,
p1, p2, p3, p4, gp, fldr, asgnAvg, projectAvg, totalAvg;

public SInfo()
{


setLayout (new GridLayout (20,2));
// Sets the text for the labels
{
blank = new JLabel ("");
blank1 = new JLabel ("");
SNamel = new JLabel ("Student Name: ");
Asign = new JLabel ("");
Asignl = new JLabel ("--------Assignment Grades--------");
Asign1l = new JLabel ("Assignment 1: ");
Asign2l = new JLabel ("Assignment 2: ");
Asign3l = new JLabel ("Assignment 3: ");
Asign4l = new JLabel ("Assignment 4: ");
Asign5l = new JLabel ("Assignment 5: ");
Asign6l = new JLabel ("Assignment 6: ");
Asign7l = new JLabel ("Assignment 7: ");
Asign8l = new JLabel ("Assignment 8: ");
Asign9l = new JLabel ("Assignment 9: ");
Asign10l = new JLabel ("Assignment 10: ");
Folderl = new JLabel ("Class Folder Grade: ");
Projectl = new JLabel ("--------Project Grades--------");
Project1l = new JLabel ("Project 1: ");
Project2l = new JLabel ("Project 2: ");
Project3l = new JLabel ("Project 3: ");
Project4l = new JLabel ("Project 4: ");
GProjectl = new JLabel ("Group Project Grade: ");


}

// Button text and sets listener for it
{
submitInfo = new JButton ("Submit");
submitInfo.addActionListener (new SubmitListener());
}

// Tells the program how long to make the textfield
{
SName = new JTextField (20);
Asign1 = new JTextField (5);
Asign2 = new JTextField (5);
Asign3 = new JTextField (5);
Asign4 = new JTextField (5);
Asign5 = new JTextField (5);
Asign6 = new JTextField (5);
Asign7 = new JTextField (5);
Asign8 = new JTextField (5);
Asign9 = new JTextField (5);
Asign10 = new JTextField (5);
Folder = new JTextField (5);
Project1 = new JTextField (5);
Project2 = new JTextField (5);
Project3 = new JTextField (5);
Project4 = new JTextField (5);
GProject = new JTextField (5);
}

// Adds the objects to the Window
{
add (SNamel);
add (SName);

add (Asign);
add (Asignl);

add (Asign1l);
add (Asign1);

add (Asign2l);
add (Asign2);

add (Asign3l);
add (Asign3);

add (Asign4l);
add (Asign4);

add (Asign5l);
add (Asign5);

add (Asign6l);
add (Asign6);

add (Asign7l);
add (Asign7);

add (Asign8l);
add (Asign8);

add (Asign9l);
add (Asign9);

add (Asign10l);
add (Asign10);

add (Folderl);
add (Folder);

add (blank1);
add (Projectl);

add (Project1l);
add (Project1);

add (Project2l);
add (Project2);

add (Project3l);
add (Project3);

add (Project4l);
add (Project4);

add (GProjectl);
add (GProject);

add (blank);
add (submitInfo);
}

// sets size and color of the window
{
setPreferredSize (new Dimension(400,450));
setBackground (Color.gray);
}
}


public class SubmitListener implements ActionListener
{
// Performs calculation and saves when button is clicked
public void actionPerformed (ActionEvent event)
{
// Sets variables for the text fields
Sname = new JLabel ("Student Name: " + SName);
AsgnAvg = new JLabel ("Average of Assignments: " + asgnAvg);
ProjectAvg = new JLabel ("Average of Individual Projects: " + projectAvg);
TotalAvg = new JLabel ("Total Average for the year: " + totalAvg);

// Assignments
{
String asgn1 = Asign1.getText();
a1 = Double.valueOf(asgn1);

String asgn2 = Asign2.getText();
a2 = Double.valueOf(asgn2);

String asgn3 = Asign3.getText();
a3 = Double.valueOf(asgn3);

String asgn4 = Asign4.getText();
a4 = Double.valueOf(asgn4);

String asgn5 = Asign5.getText();
a5 = Double.valueOf(asgn5);

String asgn6 = Asign6.getText();
a6 = Double.valueOf(asgn6);

String asgn7 = Asign7.getText();
a7 = Double.valueOf(asgn7);

String asgn8 = Asign8.getText();
a8 = Double.valueOf(asgn8);

String asgn9 = Asign9.getText();
a9 = Double.valueOf(asgn9);

String asgn10 = Asign10.getText();
a10 = Double.valueOf(asgn10);
}

// Projects
{
String proj1 = Project1.getText();
p1 = Double.valueOf(proj1);

String proj2 = Project2.getText();
p2 = Double.valueOf(proj2);

String proj3 = Project3.getText();
p3 = Double.valueOf(proj3);

String proj4 = Project4.getText();
p4 = Double.valueOf(proj4);

String gproject = GProject.getText();
gp = Double.valueOf(gproject);

String Sname = SName.getText();

// Folder
String folder = Folder.getText();
fldr = Double.valueOf(folder);
}

// Math Formula
{
// asgnAvg = 20%
// projectAvg = 45%
// fldr = 10%
// gp = 25%

asgnAvg = (a1 + a2 + a3 + a3 + a5 + a6 + a7 + a8 + a9 + a10) / 10;
projectAvg = (p1 + p2 + p3 + p4) / 4;
totalAvg = (asgnAvg * .20) + (projectAvg * .45) + (fldr * .10) + (gp * .25);




}



{
JFrame frame = new JFrame ("Student Average");
frame.setDefaultCloseOperation (JFrame.EXIT_ON_CLOSE);
frame.getContentPane().add(new SInfo2());



frame.pack();
frame.setVisible(true);
// Show the frame

frame.setSize(300, 300);
setBackground (Color.gray);
frame.setVisible(true);


}


}
}
}

And this is the second frame i am trying to open i haven't really done anything for the GUI i'm just working on it reading the variables now

// Loads all neccesary plugins
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

public class SInfo2 extends SInfo

{

// Setting all text fields, labels and button

public JLabel Sname, AsgnAvg, ProjectAvg, TotalAvg;


public SInfo2()
{

setLayout (new GridLayout (4,2));
{
Sname = new JLabel (Sname); // These are the 4 I cannot retrieve
AsgnAvg = new JLabel (asgnAvg); // These are the 4 I cannot retrieve
ProjectAvg = new JLabel (projectAvg); // These are the 4 I cannot retrieve
TotalAvg = new JLabel (totalAvg); // These are the 4 I cannot retrieve

add (Sname);
add (AsgnAvg);
add (ProjectAvg);
add (TotalAvg);
}
}
}




Thank you in advance for anyone who even looks at it

[jolly_nikki]

// Loads all neccesary plugins
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

public class SInfo extends JFrame

{

private static final int FRAME_WIDTH = 600;
private static final int FRAME_HEIGHT = 450;
private static final int FRAME_X_ORIGIN = 150;
private static final int FRAME_Y_ORIGIN = 250;
private static final int BUTTON_WIDTH = 30;
private static final int BUTTON_HEIGHT = 20;
static SInfo t;

public JButton submitInfo;

public JLabel SNamel, Asign, Asignl, Asign1l, Asign2l, Asign3l, Asign4l, Asign5l, Asign6l,
Asign7l, Asign8l, Asign9l, Asign10l, Folderl, Projectl, Project1l, Project2l, Project3l,
Project4l, GProjectl, blank, blank1, Sname, AsgnAvg, ProjectAvg, TotalAvg;

public JTextField SName, Asign1, Asign2, Asign3, Asign4, Asign5, Asign6,
Asign7, Asign8, Asign9, Asign10, Folder, Project1, Project2, Project3,
Project4, GProject;

public String studentName;

public double a1, a2, a3, a4, a5, a6, a7, a8, a9, a10,
p1, p2, p3, p4, gp, fldr, asgnAvg, projectAvg, totalAvg;

public SInfo()
{

}


private void init(){
setSize (FRAME_WIDTH, FRAME_HEIGHT);
setTitle ("Program8 - Guess the Number");
setLocation (FRAME_X_ORIGIN, FRAME_Y_ORIGIN);


setLayout (new GridLayout (20,2));
// Sets the text for the labels
{
blank = new JLabel ("");
blank1 = new JLabel ("");
SNamel = new JLabel ("Student Name: ");
Asign = new JLabel ("");
Asignl = new JLabel ("--------Assignment Grades--------");
Asign1l = new JLabel ("Assignment 1: ");
Asign2l = new JLabel ("Assignment 2: ");
Asign3l = new JLabel ("Assignment 3: ");
Asign4l = new JLabel ("Assignment 4: ");
Asign5l = new JLabel ("Assignment 5: ");
Asign6l = new JLabel ("Assignment 6: ");
Asign7l = new JLabel ("Assignment 7: ");
Asign8l = new JLabel ("Assignment 8: ");
Asign9l = new JLabel ("Assignment 9: ");
Asign10l = new JLabel ("Assignment 10: ");
Folderl = new JLabel ("Class Folder Grade: ");
Projectl = new JLabel ("--------Project Grades--------");
Project1l = new JLabel ("Project 1: ");
Project2l = new JLabel ("Project 2: ");
Project3l = new JLabel ("Project 3: ");
Project4l = new JLabel ("Project 4: ");
GProjectl = new JLabel ("Group Project Grade: ");


}

// Button text and sets listener for it
{
submitInfo = new JButton ("Submit");
submitInfo.addActionListener (new SubmitListener());
}

// Tells the program how long to make the textfield
{
SName = new JTextField (20);
Asign1 = new JTextField (5);
Asign2 = new JTextField (5);
Asign3 = new JTextField (5);
Asign4 = new JTextField (5);
Asign5 = new JTextField (5);
Asign6 = new JTextField (5);
Asign7 = new JTextField (5);
Asign8 = new JTextField (5);
Asign9 = new JTextField (5);
Asign10 = new JTextField (5);
Folder = new JTextField (5);
Project1 = new JTextField (5);
Project2 = new JTextField (5);
Project3 = new JTextField (5);
Project4 = new JTextField (5);
GProject = new JTextField (5);
}

// Adds the objects to the Window
{
add (SNamel);
add (SName);

add (Asign);
add (Asignl);

add (Asign1l);
add (Asign1);

add (Asign2l);
add (Asign2);

add (Asign3l);
add (Asign3);

add (Asign4l);
add (Asign4);

add (Asign5l);
add (Asign5);

add (Asign6l);
add (Asign6);

add (Asign7l);
add (Asign7);

add (Asign8l);
add (Asign8);

add (Asign9l);
add (Asign9);

add (Asign10l);
add (Asign10);

add (Folderl);
add (Folder);

add (blank1);
add (Projectl);

add (Project1l);
add (Project1);

add (Project2l);
add (Project2);

add (Project3l);
add (Project3);

add (Project4l);
add (Project4);

add (GProjectl);
add (GProject);

add (blank);
add (submitInfo);
}

// sets size and color of the window
{
setPreferredSize (new Dimension(400,450));
setBackground (Color.gray);
}
}

public static void main(String []args){
t = new SInfo();
t.init();
t.setVisible(true);

}



class SubmitListener implements ActionListener
{
// Performs calculation and saves when button is clicked
public void actionPerformed (ActionEvent event)
{
// Sets variables for the text fields
Sname = new JLabel ("Student Name: " + SName);
AsgnAvg = new JLabel ("Average of Assignments: " + asgnAvg);
ProjectAvg = new JLabel ("Average of Individual Projects: " + projectAvg);
TotalAvg = new JLabel ("Total Average for the year: " + totalAvg);

// Assignments

String asgn1 = Asign1.getText();
a1 = Double.valueOf(asgn1);

String asgn2 = Asign2.getText();
a2 = Double.valueOf(asgn2);

String asgn3 = Asign3.getText();
a3 = Double.valueOf(asgn3);

String asgn4 = Asign4.getText();
a4 = Double.valueOf(asgn4);

String asgn5 = Asign5.getText();
a5 = Double.valueOf(asgn5);

String asgn6 = Asign6.getText();
a6 = Double.valueOf(asgn6);

String asgn7 = Asign7.getText();
a7 = Double.valueOf(asgn7);

String asgn8 = Asign8.getText();
a8 = Double.valueOf(asgn8);

String asgn9 = Asign9.getText();
a9 = Double.valueOf(asgn9);

String asgn10 = Asign10.getText();
a10 = Double.valueOf(asgn10);


// Projects
String proj1 = Project1.getText();
p1 = Double.valueOf(proj1);

String proj2 = Project2.getText();
p2 = Double.valueOf(proj2);

String proj3 = Project3.getText();
p3 = Double.valueOf(proj3);

String proj4 = Project4.getText();
p4 = Double.valueOf(proj4);

String gproject = GProject.getText();
gp = Double.valueOf(gproject);

studentName = SName.getText();

// Folder
String folder = Folder.getText();
fldr = Double.valueOf(folder);


// Math Formula

// asgnAvg = 20%
// projectAvg = 45%
// fldr = 10%
// gp = 25%

asgnAvg = (a1 + a2 + a3 + a3 + a5 + a6 + a7 + a8 + a9 + a10) / 10;
projectAvg = (p1 + p2 + p3 + p4) / 4;
totalAvg = (asgnAvg * .20) + (projectAvg * .45) + (fldr * .10) + (gp * .25);



JFrame frame = new JFrame ("Student Average");
frame.setDefaultCloseOperation (JFrame.EXIT_ON_CLOSE);
frame.getContentPane().add(new SInfo2(t));



frame.pack();
frame.setVisible(true);
// Show the frame

frame.setSize(300, 300);
setBackground (Color.gray);
frame.setVisible(true);

}
}

}




public class SInfo2 extends JPanel

{

// Setting all text fields, labels and button

public JLabel Sname, AsgnAvg, ProjectAvg, TotalAvg;


public SInfo2(SInfo t)
{
setLayout (new GridLayout (4,2));

Sname = new JLabel (t.studentName); // These are the 4 I cannot retrieve
AsgnAvg = new JLabel (t.asgnAvg + ""); // These are the 4 I cannot retrieve
ProjectAvg = new JLabel (t.projectAvg + ""); // These are the 4 I cannot retrieve
TotalAvg = new JLabel (t.totalAvg + "");
add (Sname);
add (AsgnAvg);
add (ProjectAvg);
add (TotalAvg);

}
}



According to Java standard coding convention any variables defined should start with a lower case. For example

public JLabel SNamel, Asign

should be

public JLabel sNamel, asign


Please change all the variable accordingly.

[mmcnitt]

ok that didn't work, but I was able to figure it out and i'm just going to post because I just could not find the answer online and hopefully this'll help someone in the future.

All you do is when you have a new window open is tell it what variables to send to the new window. I commented where you do this

// Loads all neccesary plugins
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

public class SInfo extends JPanel implements ActionListener

{

// Setting all text fields, labels and button
public JButton submitInfo;

public JLabel SNamel, Asign, Asignl, Asign1l, Asign2l, Asign3l, Asign4l, Asign5l, Asign6l,
Asign7l, Asign8l, Asign9l, Asign10l, Folderl, Projectl, Project1l, Project2l, Project3l,
Project4l, GProjectl, blank, blank1, Sname, AsgnAvg, ProjectAvg, TotalAvg;

public JTextField SName, Asign1, Asign2, Asign3, Asign4, Asign5, Asign6,
Asign7, Asign8, Asign9, Asign10, Folder, Project1, Project2, Project3,
Project4, GProject;

double a1, a2, a3, a4, a5, a6, a7, a8, a9, a10,
p1, p2, p3, p4, gp, fldr, asgnAvg, projectAvg, totalAvg;

String sName;

public SInfo()
{


setLayout (new GridLayout (20,2));
// Sets the text for the labels
{
blank = new JLabel ("");
blank1 = new JLabel ("");
SNamel = new JLabel ("Student Name: ");
Asign = new JLabel ("");
Asignl = new JLabel ("--------Assignment Grades--------");
Asign1l = new JLabel ("Assignment 1: ");
Asign2l = new JLabel ("Assignment 2: ");
Asign3l = new JLabel ("Assignment 3: ");
Asign4l = new JLabel ("Assignment 4: ");
Asign5l = new JLabel ("Assignment 5: ");
Asign6l = new JLabel ("Assignment 6: ");
Asign7l = new JLabel ("Assignment 7: ");
Asign8l = new JLabel ("Assignment 8: ");
Asign9l = new JLabel ("Assignment 9: ");
Asign10l = new JLabel ("Assignment 10: ");
Folderl = new JLabel ("Class Folder Grade: ");
Projectl = new JLabel ("--------Project Grades--------");
Project1l = new JLabel ("Project 1: ");
Project2l = new JLabel ("Project 2: ");
Project3l = new JLabel ("Project 3: ");
Project4l = new JLabel ("Project 4: ");
GProjectl = new JLabel ("Group Project Grade: ");


}

// Button text and sets listener for it
{
submitInfo = new JButton ("Submit");
submitInfo.addActionListener (new SubmitListener());
}

// Tells the program how long to make the textfield
{
SName = new JTextField (20);
Asign1 = new JTextField (5);
Asign2 = new JTextField (5);
Asign3 = new JTextField (5);
Asign4 = new JTextField (5);
Asign5 = new JTextField (5);
Asign6 = new JTextField (5);
Asign7 = new JTextField (5);
Asign8 = new JTextField (5);
Asign9 = new JTextField (5);
Asign10 = new JTextField (5);
Folder = new JTextField (5);
Project1 = new JTextField (5);
Project2 = new JTextField (5);
Project3 = new JTextField (5);
Project4 = new JTextField (5);
GProject = new JTextField (5);
}

// Adds the objects to the Window
{
add (SNamel);
add (SName);

add (Asign);
add (Asignl);

add (Asign1l);
add (Asign1);

add (Asign2l);
add (Asign2);

add (Asign3l);
add (Asign3);

add (Asign4l);
add (Asign4);

add (Asign5l);
add (Asign5);

add (Asign6l);
add (Asign6);

add (Asign7l);
add (Asign7);

add (Asign8l);
add (Asign8);

add (Asign9l);
add (Asign9);

add (Asign10l);
add (Asign10);

add (Folderl);
add (Folder);

add (blank1);
add (Projectl);

add (Project1l);
add (Project1);

add (Project2l);
add (Project2);

add (Project3l);
add (Project3);

add (Project4l);
add (Project4);

add (GProjectl);
add (GProject);

add (blank);
add (submitInfo);
}

// sets size and color of the window
{
setPreferredSize (new Dimension(400,450));
setBackground (Color.lightGray);
}
}

public void actionPerformed(ActionEvent e) {
throw new UnsupportedOperationException("Not supported yet.");
}
public class SubmitListener implements ActionListener
{
// Performs calculation and saves when button is clicked
public void actionPerformed (ActionEvent event)
{


// Assignments
{
String asgn1 = Asign1.getText();
a1 = Double.valueOf(asgn1);

String asgn2 = Asign2.getText();
a2 = Double.valueOf(asgn2);

String asgn3 = Asign3.getText();
a3 = Double.valueOf(asgn3);

String asgn4 = Asign4.getText();
a4 = Double.valueOf(asgn4);

String asgn5 = Asign5.getText();
a5 = Double.valueOf(asgn5);

String asgn6 = Asign6.getText();
a6 = Double.valueOf(asgn6);

String asgn7 = Asign7.getText();
a7 = Double.valueOf(asgn7);

String asgn8 = Asign8.getText();
a8 = Double.valueOf(asgn8);

String asgn9 = Asign9.getText();
a9 = Double.valueOf(asgn9);

String asgn10 = Asign10.getText();
a10 = Double.valueOf(asgn10);
}

// Projects
{
String proj1 = Project1.getText();
p1 = Double.valueOf(proj1);

String proj2 = Project2.getText();
p2 = Double.valueOf(proj2);

String proj3 = Project3.getText();
p3 = Double.valueOf(proj3);

String proj4 = Project4.getText();
p4 = Double.valueOf(proj4);

String gproject = GProject.getText();
gp = Double.valueOf(gproject);

sName = SName.getText();

// Folder
String folder = Folder.getText();
fldr = Double.valueOf(folder);
}

// Math Formula
{
// asgnAvg = 20%
// projectAvg = 45%
// fldr = 10%
// gp = 25%

asgnAvg = (a1 + a2 + a3 + a3 + a5 + a6 + a7 + a8 + a9 + a10) / 10;
projectAvg = (p1 + p2 + p3 + p4) / 4;
totalAvg = (asgnAvg * .20) + (projectAvg * .45) + (fldr * .10) + (gp * .25);

{
JFrame SInfo2 = new JFrame ("Student Average");
SInfo2.setDefaultCloseOperation (JFrame.EXIT_ON_CLOSE);

// THIS NEXT PART IS WHAT I NEEDED TO DO
SInfo2.getContentPane().add(new SInfo2(sName, asgnAvg, projectAvg, totalAvg));
// THIS SENDS THE VARIABLES TO THE NEXT WINDOW

SInfo2.pack();
SInfo2.setVisible(true);



}
}
}
}
}



And the second window, in this one you tell it what variables it is pulling from the first window, I commented where you do this.

// Loads all neccesary plugins
import java.awt.*;
import javax.swing.*;
import java.awt.event.*;

public class SInfo2 extends JPanel
{
// Setting all text fields, labels and button
private JLabel SName, AsgnAvg, ProjectAvg, TotalAvg;
private JButton exit, resubmit;

// ON THIS SIDE YOU NEED TO TELL IT WHAT VARIABLES YOU ARE GRABBING AND WHAT TYPE THEY ARE
public SInfo2(String sName, double asgnAvg, double projectAvg, double totalAvg)
// AND THAT IS IT
{
// sets size layout and color of the window
setLayout (new GridLayout (6,1));
setPreferredSize (new Dimension(200,150));
setBackground (Color.lightGray);

{
SName = new JLabel ("Student Name: " + sName );
AsgnAvg = new JLabel ("Assignment Average: " + asgnAvg);
ProjectAvg = new JLabel ("Project Average: " + projectAvg);
TotalAvg = new JLabel ("Overall Average: " + totalAvg);
exit = new JButton ("Exit");
exit.addActionListener (new exitListener());
resubmit = new JButton ("Average Another?");
resubmit.addActionListener (new resubmitListener());
add (SName);
add (AsgnAvg);
add (ProjectAvg);
add (TotalAvg);
add (resubmit);
add (exit);
}
}
public class resubmitListener implements ActionListener
{
// Performs calculation and saves when button is clicked
public void actionPerformed (ActionEvent event)
{
JFrame SInfo = new JFrame ("Student Information");
SInfo.setDefaultCloseOperation (JFrame.EXIT_ON_CLOSE);

SInfo.getContentPane().add(new SInfo());
SInfo.pack();
SInfo.setVisible(true);
}
}
public class exitListener implements ActionListener
{
// Performs calculation and saves when button is clicked
public void actionPerformed (ActionEvent event)
{
System.exit(0);
}
}

}