JFrame help

[Caution]

Ok.. bare with me, not sure how to word this.

I am writing a program that stores airplane data. My problem right now is trying to figure out how to get the navigation to work.

My program loads my "menu page". All I want to do is figure out how to load different content in the same container when I click a button.

For instance, right now I am working on just getting displaySeating( ) to work. I have a button on my "menu page" that I want to clear all the menu buttons and show a "new page" that has seating information.

I've tried to use removeAll() to remove all the components, but I haven't gotten it to work.

Here is my code so far... it isn't close to finished, but here it is so far.

import javax.swing.*;
import java.awt.*;
import java.awt.event.*;

public class Airplane extends JFrame {
	private static final int WIDTH = 400;
	private static final int HEIGHT = 300;
	
	private JLabel menu, selOption, seatingMenu;
	private JRadioButton newPlane, displaySeating, assignSeat, cancelSeat, removeSeats, exit;
	private JButton submit, back;
	private ButtonGroup menuOptions;
	private SubmitButtonHandler subHandler;
	private boolean npTF, dsTF, asTF, csTF, rsTF, eTF;
	private JTextArea seatingMenuTA;

	public Airplane(){
	
		Container c = getContentPane();
		c.setLayout(null);

		setTitle("");
		setSize(WIDTH, HEIGHT);
		setVisible(true);
		setDefaultCloseOperation(EXIT_ON_CLOSE);
	}

	public void mainMenu(){
		Container c = getContentPane();
		c.setLayout(null);

		//JLabels
		menu = new JLabel("Main menu");
		selOption = new JLabel("Select an option");
		
		//JRadioButtons
		newPlane = new JRadioButton("Get new Plane");
		displaySeating = new JRadioButton("Display seating");
		assignSeat = new JRadioButton("Assign a seat");
		cancelSeat = new JRadioButton("Cancel a seat");
		removeSeats = new JRadioButton("Remove all seating");
		exit = new JRadioButton("Exit program");
		
		//JButtons
		submit = new JButton("Submit");
		subHandler = new SubmitButtonHandler();
		submit.addActionListener(subHandler);
		
		//set size
		newPlane.setSize(150, 30);	
		displaySeating.setSize(150, 30);	
		assignSeat.setSize(150, 30);	
		cancelSeat.setSize(150, 30);	
		removeSeats.setSize(150, 30);	
		exit.setSize(150, 30);
		menu.setSize(150, 30);	
		selOption.setSize(150,30);
		submit.setSize(150, 30);
		
		//set location
		newPlane.setLocation(100, 30);	
		displaySeating.setLocation(100, 60);	
		assignSeat.setLocation(100, 90);	
		cancelSeat.setLocation(100, 120);	
		removeSeats.setLocation(100, 150);	
		exit.setLocation(100, 180);
		menu.setLocation(0, 0);	
		selOption.setLocation(0,30);
		submit.setLocation(100, 210);
		
		//add graphic objects
		c.add(newPlane);
		c.add(displaySeating);
		c.add(assignSeat);
		c.add(cancelSeat);
		c.add(removeSeats);
		c.add(exit);
		c.add(menu);
		c.add(selOption);
		c.add(submit);
	
		//button group
		menuOptions = new ButtonGroup();
		menuOptions.add(newPlane);
		menuOptions.add(displaySeating);
		menuOptions.add(assignSeat);
		menuOptions.add(cancelSeat);
		menuOptions.add(removeSeats);
		menuOptions.add(exit);
		
		setTitle("Main Menu");
		setSize(WIDTH, HEIGHT);
		setVisible(true);
		setDefaultCloseOperation(EXIT_ON_CLOSE);
		
	}
	
	public void displaySeatingMenu(){
	
		Container c = getContentPane();
		c.setLayout(null);
		
		seatingMenu = new JLabel("Seating Chart");
		seatingMenu.setSize(150, 30);
		seatingMenu.setLocation(150, 0);
		c.add(seatingMenu);
		
		back = new JButton("Back to Menu");
		back.setSize(150, 30);
		back.setLocation(120, 210);
		c.add(back);
		
		seatingMenuTA = new JTextArea(40, 10);
		seatingMenuTA.setSize(150,150);
		seatingMenuTA.setLocation(100, 30);
		//seatingMenuTA.append("\n\n\n\n\n\n\n\n\n\n");
			
		
		c.add(seatingMenuTA);
		
		setTitle("Seating Chart");
		setSize(WIDTH, HEIGHT);
		setVisible(true);
		setDefaultCloseOperation(EXIT_ON_CLOSE);

	}//end displaySeating

	
	
	private class SubmitButtonHandler implements ActionListener {
		public void actionPerformed(ActionEvent e){
			
			if(npTF == true){
			
			}
			if(asTF == true){
			
			}
			if(dsTF == true){
				
				
			}
			if(csTF == true){
			
			}
			if(rsTF == true){
			
			}
			if(eTF == true){
			
			}
			else{
			}
		}//end actionPerformed
	}//end SubmitButtonHandler

	public void itemStateChanged(ItemEvent e){
		if(e.getSource() == newPlane){
			npTF = true; dsTF = false; asTF = false; csTF = false; rsTF = false; eTF = false;
		}
		if(e.getSource() == displaySeating){
		npTF = false; dsTF = true; asTF = false; csTF = false; rsTF = false; eTF = false; 
		}
		if(e.getSource() == assignSeat){
			npTF = false; dsTF = false; asTF = true; csTF = false; rsTF = false; eTF = false;
		}
		if(e.getSource() == cancelSeat){
			npTF = false; dsTF = false; asTF = false; csTF = true; rsTF = false; eTF = false;
		}
		if(e.getSource() == removeSeats){
			npTF = false; dsTF = false; asTF = false; csTF = false; rsTF = true; eTF = false;
		}
		if(e.getSource() == exit){
			npTF = false; dsTF = false; asTF = false; csTF = false; rsTF = false; eTF = true;
		}
	}//end itemStateChanged

	public static void main(String[] args){
		char[][] seating = new char[7][8];
		
		Airplane plane = new Airplane(); 
		plane.mainMenu();
		
	}//end main
}//end Airplane

[Caution]

not sure if I was clear enough, really frustrated right now, let me know if I wasn't clear :\

[r035198x]

not sure if I was clear enough, really frustrated right now, let me know if I wasn't clear :\

I have to go now maybe someone else will help you out but I would advise you to use JPanels for laying out things

[Caution]

I haven't learned anything about JPanels yet :\

I just converted all of the JRadioButtons into JButtons. The button I used to test bringing up the second window works, but it isn't removing any of the previous content in the container.

I used getContentPane( ).removeAll(); then called the method to load the next screen. It doesn;t look like removeAll() did anything...

[Caution]

when I scroll over the container, the new buttons then overlap the old ones... I tried removeAll and removing them one by one, not working...

[DeMan]

There is loads of online information about JPanels, if you are really interested (just search for jPanel)

Basically, JPanel has a constructor that accepts a LayoutManager (of which you have several choices, but are generally easy to use). The LayoutManager defines how (or probably more accurately where) things are displayed on the screen. I think (And I'm sure someone will correct me if I'm wrong), that the most layout managers can work with %ages (like html can), so that size of objects can be relative and overlap isn't an issue. Check out the tute's you can find if you want exact detail.....

[Caution]

I'm not sure how/if that's going to help me right now. I just need to understand why removeAll() isn't working.

Here's where I am now, didn't change much, but the submit button at least calls displaySeatingM enu() correctly, the problem is components from mainMenu() don't get removed.

import javax.swing.*;
import java.awt.*;
import java.awt.event.*;

public class Airplane extends JFrame {
	private static final int WIDTH = 400;
	private static final int HEIGHT = 300;
	
	private JLabel menu, selOption, seatingMenu;
	private JButton submit, back, newPlane, displaySeating, assignSeat, cancelSeat, removeSeats, exit;
	private ButtonGroup menuOptions;
	private SubmitButtonHandler subHandler;
	private boolean npTF, dsTF, asTF, csTF, rsTF, eTF;
	private JTextArea seatingMenuTA;

	public Airplane(){
	
		Container c = getContentPane();
		c.setLayout(null);

		setTitle("");
		setSize(WIDTH, HEIGHT);
		setVisible(true);
		setDefaultCloseOperation(EXIT_ON_CLOSE);
	}

	public void mainMenu(){
		Container c = getContentPane();
		c.setLayout(null);

		//JLabels
		menu = new JLabel("Main menu");
		selOption = new JLabel("Select an option");
		
		//JButtons
		newPlane = new JButton("Get new Plane");
		displaySeating = new JButton("Display seating");
		assignSeat = new JButton("Assign a seat");
		cancelSeat = new JButton("Cancel a seat");
		removeSeats = new JButton("Remove all seating");
		exit = new JButton("Exit program");
		submit = new JButton("Submit");
		subHandler = new SubmitButtonHandler();
		submit.addActionListener(subHandler);
		
		//set size
		newPlane.setSize(150, 30);	
		displaySeating.setSize(150, 30);	
		assignSeat.setSize(150, 30);	
		cancelSeat.setSize(150, 30);	
		removeSeats.setSize(150, 30);	
		exit.setSize(150, 30);
		menu.setSize(150, 30);	
		selOption.setSize(150,30);
		submit.setSize(150, 30);
		
		//set location
		newPlane.setLocation(100, 30);	
		displaySeating.setLocation(100, 60);	
		assignSeat.setLocation(100, 90);	
		cancelSeat.setLocation(100, 120);	
		removeSeats.setLocation(100, 150);	
		exit.setLocation(100, 180);
		menu.setLocation(0, 0);	
		selOption.setLocation(0,30);
		submit.setLocation(100, 210);
		
		//add graphic objects
		c.add(newPlane);
		c.add(displaySeating);
		c.add(assignSeat);
		c.add(cancelSeat);
		c.add(removeSeats);
		c.add(exit);
		c.add(menu);
		c.add(selOption);
		c.add(submit);
		
		setTitle("Main Menu");
		setSize(WIDTH, HEIGHT);
		setVisible(true);
		setDefaultCloseOperation(EXIT_ON_CLOSE);
		
	}
	
	public void displaySeatingMenu(){
	
		Container c = getContentPane();
		c.setLayout(null);
		
		seatingMenu = new JLabel("Seating Chart");
		seatingMenu.setSize(150, 30);
		seatingMenu.setLocation(150, 0);
		c.add(seatingMenu);
		
		back = new JButton("Back to Menu");
		back.setSize(150, 30);
		back.setLocation(120, 210);
		c.add(back);
		
		seatingMenuTA = new JTextArea(40, 10);
		seatingMenuTA.setSize(150,150);
		seatingMenuTA.setLocation(100, 30);
		//seatingMenuTA.append("\n\n\n\n\n\n\n\n\n\n");
			
		
		c.add(seatingMenuTA);
		
		setTitle("Seating Chart");
		setSize(WIDTH, HEIGHT);
		setVisible(true);
		setDefaultCloseOperation(EXIT_ON_CLOSE);

	}//end displaySeating

	
	
	private class SubmitButtonHandler implements ActionListener {
		public void actionPerformed(ActionEvent e){
			getContentPane().removeAll();
			displaySeatingMenu();
		}//end actionPerformed
	}//end SubmitButtonHandler


	public static void main(String[] args){
		char[][] seating = new char[7][8];
		
		Airplane plane = new Airplane(); 
		plane.mainMenu();
		
	}//end main
}//end Airplane

[r035198x]

I'm not sure how/if that's going to help me right now. I just need to understand why removeAll() isn't working.

Here's where I am now, didn't change much, but the submit button at least calls displaySeatingM enu() correctly, the problem is components from mainMenu() don't get removed.

import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
 
public class Airplane extends JFrame {
	private static final int WIDTH = 400;
	private static final int HEIGHT = 300;
 
	private JLabel menu, selOption, seatingMenu;
	private JButton submit, back, newPlane, displaySeating, assignSeat, cancelSeat, removeSeats, exit;
	private ButtonGroup menuOptions;
	private SubmitButtonHandler subHandler;
	private boolean npTF, dsTF, asTF, csTF, rsTF, eTF;
	private JTextArea seatingMenuTA;
 
	public Airplane(){
 
		Container c = getContentPane();
		c.setLayout(null);
 
		setTitle("");
		setSize(WIDTH, HEIGHT);
		setVisible(true);
		setDefaultCloseOperation(EXIT_ON_CLOSE);
	}
 
	public void mainMenu(){
		Container c = getContentPane();
		c.setLayout(null);
 
		//JLabels
		menu = new JLabel("Main menu");
		selOption = new JLabel("Select an option");
 
		//JButtons
		newPlane = new JButton("Get new Plane");
		displaySeating = new JButton("Display seating");
		assignSeat = new JButton("Assign a seat");
		cancelSeat = new JButton("Cancel a seat");
		removeSeats = new JButton("Remove all seating");
		exit = new JButton("Exit program");
		submit = new JButton("Submit");
		subHandler = new SubmitButtonHandler();
		submit.addActionListener(subHandler);
 
		//set size
		newPlane.setSize(150, 30);	
		displaySeating.setSize(150, 30);	
		assignSeat.setSize(150, 30);	
		cancelSeat.setSize(150, 30);	
		removeSeats.setSize(150, 30);	
		exit.setSize(150, 30);
		menu.setSize(150, 30);	
		selOption.setSize(150,30);
		submit.setSize(150, 30);
 
		//set location
		newPlane.setLocation(100, 30);	
		displaySeating.setLocation(100, 60);	
		assignSeat.setLocation(100, 90);	
		cancelSeat.setLocation(100, 120);	
		removeSeats.setLocation(100, 150);	
		exit.setLocation(100, 180);
		menu.setLocation(0, 0);	
		selOption.setLocation(0,30);
		submit.setLocation(100, 210);
 
		//add graphic objects
		c.add(newPlane);
		c.add(displaySeating);
		c.add(assignSeat);
		c.add(cancelSeat);
		c.add(removeSeats);
		c.add(exit);
		c.add(menu);
		c.add(selOption);
		c.add(submit);
 
		setTitle("Main Menu");
		setSize(WIDTH, HEIGHT);
		setVisible(true);
		setDefaultCloseOperation(EXIT_ON_CLOSE);
 
	}
 
	public void displaySeatingMenu(){
 
		Container c = getContentPane();
		c.setLayout(null);
 
		seatingMenu = new JLabel("Seating Chart");
		seatingMenu.setSize(150, 30);
		seatingMenu.setLocation(150, 0);
		c.add(seatingMenu);
 
		back = new JButton("Back to Menu");
		back.setSize(150, 30);
		back.setLocation(120, 210);
		c.add(back);
 
		seatingMenuTA = new JTextArea(40, 10);
		seatingMenuTA.setSize(150,150);
		seatingMenuTA.setLocation(100, 30);
		//seatingMenuTA.append("\n\n\n\n\n\n\n\n\n\n");
 
 
		c.add(seatingMenuTA);
 
		setTitle("Seating Chart");
		setSize(WIDTH, HEIGHT);
		setVisible(true);
		setDefaultCloseOperation(EXIT_ON_CLOSE);
 
	}//end displaySeating
 
 
 
	private class SubmitButtonHandler implements ActionListener {
		public void actionPerformed(ActionEvent e){
			getContentPane().removeAll();
			displaySeatingMenu();
		}//end actionPerformed
	}//end SubmitButtonHandler
 
 
	public static void main(String[] args){
		char[][] seating = new char[7][8];
 
		Airplane plane = new Airplane(); 
		plane.mainMenu();
 
	}//end main
}//end Airplane

Since you seem new to swing, all I can say is that if you use JPanels you'll be able to see the remove working properly. I also do not think it's correct to learn how to use JButtons and JRadioButtons before you learn to use JPanel.