Swing Curley Brackets Problem

[mr.gizm0]

Hi all, I decided to have a go at writing a gui for today for a quiz program, in swing, and I can't get my head around the errors I've tried every combination of extra brackets possible and none seem to many any difference. I Just want the gui to appear for now, but i'm getting this error

g@(gizywig) javac test.java
test.java:20: '{' expected
public class GuiQuiz()
^
test.java:57: '}' expected
^
2 errors

and I cant for the devil of me work it out, if someone could point me in the right direction I would be very grateful. here's my source code:

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

public class GuiQuiz extends JFrame
{
	
	private JLabel MenuLabel;
	private JLabel QuestionsLabel;
	private JTextArea Display;
	private JScrollPane jScrollPane1;
	private JTextArea jTextArea2;
	private JScrollPane jScrollPane2;
	private JButton BeginQuiz;
	private JPanel contentPane;

	public class GuiQuiz()
	{
	
		setTitle("SwingQuiz");
		setLocation(new Point(2, 5));
		setSize(new Dimension(471, 535));
                MenuLabel.setBounds(75,11,80,18);
		MenuLabel = new JLabel();
		QuestionsLabel = new JLabel();
		Display = new JTextArea();
		jScrollPane1 = new JScrollPane();
		jTextArea2 = new JTextArea();
		jScrollPane2 = new JScrollPane();
		BeginQuiz = new JButton();
		contentPane = (JPanel)this.getContentPane();
         	MenuLabel.setText("Menu Selection");
		QuestionsLabel.setText("Questions");
                BeginQuiz.setText("Begin Quiz");
		jScrollPane1.setViewportView(Display);
		jScrollPane2.setViewportView(jTextArea2);
		contentPane.setLayout(null);
		contentPane.MenuLabel.setBounds(75,11,80,18);
		contentPane.QuestionsLabel.setBounds(270,13,60,18);
		contentPane.jScrollPane1.setBounds(228,40,214,265);
		contentPane.jScrollPane2.setBounds(29,341,403,160);
		contentPane.BeginQuiz.setBounds(58,36,133,42);

this.setVisible(true);
}
public static void main(String args[])
{
new GuiQuiz();
}
}

thanks alot mr.gizm0

[Jamie]

public class GuiQuiz {}
	{

[mr.gizm0]

:| are you sure you can use that syntax?

g@(gizywig) javac test2.java
test2.java:17: ';' expected
public test2 GuiQuiz{}
^
1 error

thanks for trying to help me anyway

[Jamie]

This compiles fine for me...

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

public class GuiQuiz extends JFrame
{
	
	private JLabel MenuLabel;
	private JLabel QuestionsLabel;
	private JTextArea Display;
	private JScrollPane jScrollPane1;
	private JTextArea jTextArea2;
	private JScrollPane jScrollPane2;
	private JButton BeginQuiz;
	private JPanel contentPane;

	public class GuiQuiz {}
	{
	
		setTitle("SwingQuiz");
		setLocation(new Point(2, 5));
		setSize(new Dimension(471, 535));
		MenuLabel.setBounds(75,11,80,18);
		MenuLabel = new JLabel();
		QuestionsLabel = new JLabel();
		Display = new JTextArea();
		jScrollPane1 = new JScrollPane();
		jTextArea2 = new JTextArea();
		jScrollPane2 = new JScrollPane();
		BeginQuiz = new JButton();
		contentPane = (JPanel)this.getContentPane();
		MenuLabel.setText("Menu Selection");
		QuestionsLabel.setText("Questions");
		BeginQuiz.setText("Begin Quiz");
		jScrollPane1.setViewportView(Display);
		jScrollPane2.setViewportView(jTextArea2);
		contentPane.setLayout(null);
		contentPane.MenuLabel.setBounds(75,11,80,18);
		contentPane.QuestionsLabel.setBounds(270,13,60,18)  ;
		contentPane.jScrollPane1.setBounds(228,40,214,265)  ;
		contentPane.jScrollPane2.setBounds(29,341,403,160)  ;
		contentPane.BeginQuiz.setBounds(58,36,133,42);

		this.setVisible(true);
	}
		public static void main(String args[])
		{
			new GuiQuiz();
		}
	}

[mr.gizm0]

very strange, I still can't get it to work ;/ thanks anyway

[Jamie]

Hmmmm. Are you using the JDK to compile this?

[mr.gizm0]

I am indeed, I selected to install it when I installed slackware linux.

[Jamie]

Sorry. Brainfade. Try this...

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

public class GuiQuiz extends JFrame
{
	
	private JLabel MenuLabel;
	private JLabel QuestionsLabel;
	private JTextArea Display;
	private JScrollPane jScrollPane1;
	private JTextArea jTextArea2;
	private JScrollPane jScrollPane2;
	private JButton BeginQuiz;
	private JPanel contentPane;

	GuiQuiz ()
	{
		setTitle("SwingQuiz");
		setLocation(new Point(2, 5));
		setSize(new Dimension(471, 535));
		MenuLabel.setBounds(75,11,80,18);
		MenuLabel = new JLabel();
		QuestionsLabel = new JLabel();
		Display = new JTextArea();
		jScrollPane1 = new JScrollPane();
		jTextArea2 = new JTextArea();
		jScrollPane2 = new JScrollPane();
		BeginQuiz = new JButton();
		contentPane = (JPanel)this.getContentPane();
		MenuLabel.setText("Menu Selection");
		QuestionsLabel.setText("Questions");
		BeginQuiz.setText("Begin Quiz");
		jScrollPane1.setViewportView(Display);
		jScrollPane2.setViewportView(jTextArea2);
		contentPane.setLayout(null);
		contentPane.MenuLabel.setBounds(75,11,80,18);
		contentPane.QuestionsLabel.setBounds(270,13,60,18);
		contentPane.jScrollPane1.setBounds(228,40,214,265);
		contentPane.jScrollPane2.setBounds(29,341,403,160);
		contentPane.BeginQuiz.setBounds(58,36,133,42);

		this.setVisible(true);
	}
	public static void main(String args[])
	{
		new GuiQuiz();
	}
}

[Jamie]

Try the code I just posted above there... that gets a lot closer to compiling with javac for me

[mr.gizm0]

still not working, but thanks again lol, is this correct "contentPane.jScrollPane2.setBounds" i tried what you suggested and i got alot of errors which had ^'s point at contentPane so I removed contentPane and then it compiled from that I try and run and I get

g@(gizywig) java GuiQuiz
Exception in thread "main" java.lang.NullPointerException
at GuiQuiz.<init>(GuiQuiz.java:22)
at GuiQuiz.main(GuiQuiz.java:47)

cat -n reveals 22 is

MenuLabel.setBounds(75,11,80,18);

and 47 is

new GuiQuiz();

lol this is a nightmare, thank you so much for spending your time helping me.

[sjalle]

Im not sure what the trouble was here, but this:

contentPane.MenuLabel.setBounds(75,11,80,18);
contentPane.QuestionsLabel.setBounds(270,13,60,18)  ;
contentPane.jScrollPane1.setBounds(228,40,214,265)  ;
contentPane.jScrollPane2.setBounds(29,341,403,160)  ;
contentPane.BeginQuiz.setBounds(58,36,133,42);

implies that the components are properties of the
contentpane, which they are not.

I removed those and shifted the component creation around a little, and now
it works,..... well it compiles ans displays ...

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

public class GuiQuiz
    extends JFrame {

  private JLabel MenuLabel=new JLabel();
  private JLabel QuestionsLabel=new JLabel();
  private JTextArea Display;
  private JScrollPane jScrollPane1=new JScrollPane();
  private JTextArea jTextArea2= new JTextArea();
  private JScrollPane jScrollPane2= new JScrollPane();
  private JButton BeginQuiz= new JButton();


  public GuiQuiz() {
    setTitle("SwingQuiz");
    setLocation(new Point(2, 5));
    setSize(new Dimension(471, 535));
    MenuLabel.setBounds(75, 11, 80, 18);

    MenuLabel.setText("Menu Selection");
    QuestionsLabel.setText("Questions");
    BeginQuiz.setText("Begin Quiz");
    jScrollPane1.setViewportView(Display);
    jScrollPane2.setViewportView(jTextArea2);
    getContentPane().setLayout(null);
    getContentPane().add(MenuLabel);
    getContentPane().add(jScrollPane1);
    getContentPane().add(jScrollPane2);
    getContentPane().add(BeginQuiz);

    MenuLabel.setBounds(75, 11, 80, 18);
    QuestionsLabel.setBounds(270, 13, 60, 18);
    jScrollPane1.setBounds(228, 40, 214, 265);
    jScrollPane2.setBounds(29, 341, 403, 160);
    BeginQuiz.setBounds(58, 36, 133, 42);

    this.setVisible(true);
  }

  public static void main(String args[]) {
    new GuiQuiz();
  }
}

[mr.gizm0]

thanks for your help sjalle works great now, I guess I just confused myself or something.
thanks again,

mr.gizm0