Logo quiz

**big daan1234** · December 15th, 2012, 07:15 AM

Hi,
I'm making a logo quiz just for fun but i do not understand why it is not working. Maybe someone can help me out?
When i press the "volgende" (which is Dutch for "next" ) button it should go to th next image if the right key is inputted in the textfield.
So this is my program:

import java.awt.*;
import java.awt.event.*;
import java.applet.Applet;
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Graphics;
import java.awt.Image;
import java.awt.MediaTracker;
import java.awt.TextField;
import javax.swing.JButton;
 
public class logoprogramma extends Applet implements ActionListener
{
	TextField logonaam;
	JButton volgendeknop = new JButton("volgende");
	boolean geklikt;
	boolean klaar;
	Image plaatje;
	MediaTracker tr;
	String sleutel[]={"remia", "burger king", "ebay", "michelin", "pringles", "red bull"}; 				
	String plaatjes[]={"../plaatjes/Remia.gif", "../plaatjes/burger king.jpg", "../plaatjes/ebay.jpg", "../plaatjes/michelin.jpg", "../plaatjes/pringles.jpg", "../plaatjes/red bull.jpg"}; //<------------------
	int teller, aantal_vragen;
	String antwoord="?"; 															
	Dimension dim = Toolkit.getDefaultToolkit().getScreenSize();
	int breedteScherm = dim.width;
	int hoogteScherm = dim.height;
	int plaatsPlaatjeY = (hoogteScherm - 140)/2;
	int plaatsPlaatjeX = (breedteScherm - 225)/2;
	int score = teller;
 
 
 
	public void init()
	{
 
		setSize(java.awt.Toolkit.getDefaultToolkit().getScreenSize());
		logonaam = new TextField(20);
		this.add(logonaam);	
		teller = 0;
		aantal_vragen = 6;												
		klaar = false;
		logonaam.addActionListener(this);
		antwoord = logonaam.getText();
		this.add(volgendeknop);
		volgendeknop.addActionListener(this);
		geklikt = false;
 
	}
 
	public void actionPerformed(ActionEvent e)
	{
		geklikt = true;
		repaint();
 
	}
 
	public void paint (Graphics gr)
	{
		if (geklikt = true){
		if (antwoord.equalsIgnoreCase(sleutel[teller]))
			{
				teller++;
				score++;
				if (teller == aantal_vragen) klaar = true;
			}
 
		if (klaar)
		{	
			gr.drawString("uw score is " + score, plaatsPlaatjeX, plaatsPlaatjeY);
			gr.setColor(Color.GREEN);
			gr.fillOval(50, 50, 100, 100);
			gr.setColor(Color.BLUE);
			gr.fillOval(81, 85, 8, 8);
			gr.fillOval(111, 85, 8, 8);
			gr.drawArc(75, 75, 50, 50, 225, 90);	
		}
		else 									
		{
			tr = new MediaTracker(this);
			logonaam.setText("");
			plaatje = getImage(getCodeBase(), plaatjes[teller]);
			tr.addImage(plaatje,0);
			gr.drawImage(plaatje, plaatsPlaatjeX, plaatsPlaatjeY, this);
		}
 
	}
	}
private static final long serialVersionUId = 1L;
}

**Norm** · December 15th, 2012, 08:14 AM

it is not working

Please explain what " it is not working" means.

Please edit your post and wrap your code with
[code=java]
<YOUR CODE HERE>
[/code]
to get highlighting and preserve formatting.

**big daan1234** · December 15th, 2012, 08:26 AM

Thank you for your advice, I have changed what you asked for.

**Norm** · December 15th, 2012, 08:35 AM

if the right key is inputted in the textfield.

Can you put the "right key" in the textfield so all that is required is pressing the next button?

Try debugging the code by adding println statements that print out the values of the variables that are used to control the execution.
The print out will show you what the computer sees and when it sees it.

**big daan1234** · December 15th, 2012, 08:43 AM

the first key is "remia" the second key is "burger king" third "ebay" fourth key is "michelin" fifth key is "pringles" sixth key is "red bull"

but here is the edited code which will always give you the right key:

import java.awt.*;
import java.awt.event.*;
import java.applet.Applet;
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Graphics;
import java.awt.Image;
import java.awt.MediaTracker;
import java.awt.TextField;
import javax.swing.JButton;
 
public class logoprogramma extends Applet implements ActionListener
{
	TextField logonaam;
	JButton volgendeknop = new JButton("volgende");
	boolean geklikt;
	boolean klaar;
	Image plaatje;
	MediaTracker tr;
	String sleutel[]={"remia", "burger king", "ebay", "michelin", "pringles", "red bull"}; 				
	String plaatjes[]={"../plaatjes/Remia.gif", "../plaatjes/burger king.jpg", "../plaatjes/ebay.jpg", "../plaatjes/michelin.jpg", "../plaatjes/pringles.jpg", "../plaatjes/red bull.jpg"}; //<------------------
	int teller, aantal_vragen;
	String antwoord="?"; 															
	Dimension dim = Toolkit.getDefaultToolkit().getScreenSize();
	int breedteScherm = dim.width;
	int hoogteScherm = dim.height;
	int plaatsPlaatjeY = (hoogteScherm - 140)/2;
	int plaatsPlaatjeX = (breedteScherm - 225)/2;
	int score = teller;
 
 
 
	public void init()
	{
 
		setSize(java.awt.Toolkit.getDefaultToolkit().getScreenSize());
		logonaam = new TextField(20);
		this.add(logonaam);	
		teller = 0;
		aantal_vragen = 6;												
		klaar = false;
		logonaam.addActionListener(this);
		antwoord = logonaam.getText();
		this.add(volgendeknop);
		volgendeknop.addActionListener(this);
		geklikt = false;
 
	}
 
	public void actionPerformed(ActionEvent e)
	{
		geklikt = true;
		repaint();
 
	}
 
	public void paint (Graphics gr)
	{
		if (geklikt = true){
		if (antwoord.equalsIgnoreCase(sleutel[teller]))
			{
				teller++;
				score++;
				if (teller == aantal_vragen) klaar = true;
			}
 
		if (klaar)
		{	
			gr.drawString("uw score is " + score, plaatsPlaatjeX, plaatsPlaatjeY);
			gr.setColor(Color.GREEN);
			gr.fillOval(50, 50, 100, 100);
			gr.setColor(Color.BLUE);
			gr.fillOval(81, 85, 8, 8);
			gr.fillOval(111, 85, 8, 8);
			gr.drawArc(75, 75, 50, 50, 225, 90);	
		}
		else 									
		{
			tr = new MediaTracker(this);
			logonaam.setText(sleutel[teller]);
			plaatje = getImage(getCodeBase(), plaatjes[teller]);
			tr.addImage(plaatje,0);
			gr.drawImage(plaatje, plaatsPlaatjeX, plaatsPlaatjeY, this);
		}
 
	}
	}
private static final long serialVersionUId = 1L;
}

**Norm** · December 15th, 2012, 08:46 AM

Try debugging the code by adding println statements that print out the values of the variables that are used to control the execution.
The print out will show you what the computer sees and when it sees it.

One problem is overriding the paint() method for the applet where there are components also being shown. There should be separate components s for the images and for the other components.

**big daan1234** · December 15th, 2012, 09:01 AM

tried it like this:

import java.awt.*;
import java.awt.event.*;
import java.applet.Applet;
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Graphics;
import java.awt.Image;
import java.awt.MediaTracker;
import java.awt.TextField;
import javax.swing.JButton;
 
public class logoprogramma extends Applet implements ActionListener
{
	TextField logonaam;
	JButton volgendeknop = new JButton("volgende");
	boolean geklikt;
	boolean klaar;
	Image plaatje;
	MediaTracker tr;
	String sleutel[]={"remia", "burger king", "ebay", "michelin", "pringles", "red bull"}; 				//<-----------------
	String plaatjes[]={"../plaatjes/Remia.gif", "../plaatjes/burger king.jpg", "../plaatjes/ebay.jpg", "../plaatjes/michelin.jpg", "../plaatjes/pringles.jpg", "../plaatjes/red bull.jpg"}; //<------------------
	int teller, aantal_vragen;
	String antwoord="?"; 															//<---------------------------------------
	Dimension dim = Toolkit.getDefaultToolkit().getScreenSize();
	int breedteScherm = dim.width;
	int hoogteScherm = dim.height;
	int plaatsPlaatjeY = (hoogteScherm - 140)/2;
	int plaatsPlaatjeX = (breedteScherm - 225)/2;
	double score = teller;
 
 
 
	public void init()
	{
 
		setSize(java.awt.Toolkit.getDefaultToolkit().getScreenSize());
		logonaam = new TextField(20);
		this.add(logonaam);	
		teller = 0;
		aantal_vragen = 6;												//<-----------------------------------------------
		klaar = false;
		logonaam.addActionListener(this);
		antwoord = logonaam.getText();
		this.add(volgendeknop);
		volgendeknop.addActionListener(this);
		geklikt = false;
 
	}
 
	public void actionPerformed(ActionEvent e)
	{
		geklikt = true;
 
		repaint();
 
	}
 
	public void paint (Graphics gr)
	{
		if (geklikt = true){ System.out.println("button is clicked");
		if (antwoord.equalsIgnoreCase(sleutel[teller]))
			{System.out.println("key is right");
				teller++;
				score++;
				if (teller == aantal_vragen) klaar = true;
			}
		else {score = score - 1;
		System.out.println("score minus 1");}
		if (klaar)
		{	System.out.println("klaar");
			gr.drawString("uw score is " + score, plaatsPlaatjeX, plaatsPlaatjeY);
			gr.setColor(Color.GREEN);
			gr.fillOval(50, 50, 100, 100);
			gr.setColor(Color.BLUE);
			gr.fillOval(81, 85, 8, 8);
			gr.fillOval(111, 85, 8, 8);
			gr.drawArc(75, 75, 50, 50, 225, 90);	
		}
		else 									//BETEKENT VOLGENDE VRAAG!
		{	System.out.println("draw image");
			tr = new MediaTracker(this);
			logonaam.setText(sleutel[teller]);
			plaatje = getImage(getCodeBase(), plaatjes[teller]);
			tr.addImage(plaatje,0);
			gr.drawImage(plaatje, plaatsPlaatjeX, plaatsPlaatjeY, this);
		}
 
	}
	}
private static final long serialVersionUId = 1L;
}

results that came out were:
button is clicked
score minus 1
draw image
button is clicked
score minus 1
draw image
button is clicked
score minus 1
draw image
button is clicked
score minus 1
draw image
button is clicked
score minus 1
draw image
button is clicked
score minus 1
draw image

I can't see what is wrong by doing this.

**Norm** · December 15th, 2012, 10:24 AM

What image is being drawn? Print out the image to see. Does it change? SHould it change?

What about this printout: System.out.println("key is right");
It's never executed.

What about this:
One problem is overriding the paint() method for the applet where there are components also being shown. There should be separate components for the images and for the other components.

**big daan1234** · December 15th, 2012, 10:37 AM

Originally Posted by Norm

What about this:
One problem is overriding the paint() method for the applet where there are components also being shown. There should be separate components for the images and for the other components.

I don't understand what you mean with this, could you explain?

The image should change to the next image when the next(volgende) button is pressed and the key is right.

**Norm** · December 15th, 2012, 10:45 AM

Define a JPanel, override its paintComponent() method, remove the paint() method from the applet, copy the code from the paint() method into the paintComponent method, create an instance of the JPanel and add it to the Applet class instance.

The image should change to the next image when the next(volgende) button is pressed and the key is right.

What about this printout: System.out.println("key is right");
It's never executed.
Print out the value of teller when the image is drawn.

**big daan1234** · December 15th, 2012, 10:57 AM

Thanks it worked!

Thread: Logo quiz

LinkBack

Thread Tools

Display

Logo quiz

Related threads:

Re: Logo quiz

The Following User Says Thank You to Norm For This Useful Post:

Re: Logo quiz

Re: Logo quiz

Re: Logo quiz

Re: Logo quiz

The Following User Says Thank You to Norm For This Useful Post:

Re: Logo quiz

Re: Logo quiz

Re: Logo quiz

Re: Logo quiz

The Following User Says Thank You to Norm For This Useful Post:

Re: Logo quiz

Similar Threads

AppInventor Quiz App

[SOLVED] Addition Quiz

send image (logo) and text & barcode to the Zebra Printer

Quiz application

math quiz program

Tags for this Thread