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Thread: Help Fixing Code and Painting(Java Applet)

  1. #1
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    Default Help Fixing Code and Painting(Java Applet)

    I've run into some sort of a conundrum in my code. I am a 1st year college student in Java, so im not really experience, but i am doing a applet for a test grade and am having trouble trying to get it run. What im trying to do is get some textfields, labels, and a jframe with a jpanel to run them on, but i am drawing up blanks. so far i've gotten:

     import javax.swing.JApplet;
    import java.awt.Graphics;
    import javax.swing.JTextField;
    import java.util.Timer;
    import javax.swing.JPanel;
    import javax.swing.JFrame;
    import java.awt.*;
    import java.awt.event.*;
    import javax.swing.*;
     
    public class superclass extends JApplet
    {
    public JTextField one;
    public JTextField two;
    public JTextField three;
    public JTextField four;
    JPanel big = new JPanel();
    JFrame bigger = new JFrame();
    Timer timer1 = new Timer();
     
    public void init()
    {
    JTextField one = new JTextField(7);
    JTextField two = new JTextField(7);
    JTextField three = new JTextField(7);
    JTextField four = new JTextField(7);
     
    JLabel onelabel = new JLabel("Car 1:");
    JLabel twolabel = new JLabel("Car 2:");
    JLabel threelabel = new JLabel("Car 3:");
    JLabel fourlabel = new JLabel("Car 4:");
     
    bigger.add(big);
    big.add(one);
    big.add(two);
    big.add(three);
    big.add(four);
    }
     
    public void paint(Graphics g)
    {
     
     
    }
    }
    the biggest trouble for me is getting the jframe to show up with the panel and it's components, and also sizing the jframe and panel and getting lines to show up on the panel. i have scare knowledge on how paint works as my teachers zooms out of the class, so any help is greatly appreciated, like if the frame and panel are needed at all. ciao, and thank you.


  2. #2
    Super Moderator Norm's Avatar
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    Default Re: Help Fixing Code and Painting(Java Applet)

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

    Be sure the code is properly formatted with indentations for nested statements.
    If there is no code in the paint() method, remove it so it doesn't do any harm.

    You should read the tutorial about how to create a GUI: http://docs.oracle.com/javase/tutori...ing/index.html


    Why are you writing an applet and using a JFrame. The two do NOT normally go together.
    If you don't understand my answer, don't ignore it, ask a question.

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

    LovellHoliday (March 26th, 2013)

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    Default Re: Help Fixing Code and Painting(Java Applet)

    so could i do all my coding and painting without a JFrame? i was under the impression that they had to be together

  5. #4
    Super Moderator Norm's Avatar
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    Default Re: Help Fixing Code and Painting(Java Applet)

    Applets are special classes that execute in a browser.
    JFrames are normally used in applications executed by the java program.

    They normally do NOT go together.
    If you don't understand my answer, don't ignore it, ask a question.

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

    LovellHoliday (March 26th, 2013)

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    Default Re: Help Fixing Code and Painting(Java Applet)

    OK, i really appreciate that because i must've been getting the wrong info. Did you see my code? i was wondering if i could cut out the frame and the panel and paint the objects i have there on it, like the textfields and labels. im in the middle of making a racecar applet and this is just the beginning. also, any tips on how to do drawLine correctly? i have nothing show up when i do it.

  8. #6
    Super Moderator Norm's Avatar
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    Default Re: Help Fixing Code and Painting(Java Applet)

    You should read the tutorial at the link I posted above to see how to build a Swing GUI.
    Also see this tutorial about how to do custom painting:
    Lesson: Performing Custom Painting (The Javaô Tutorials > Creating a GUI With JFC/Swing)
    If you don't understand my answer, don't ignore it, ask a question.

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

    LovellHoliday (March 26th, 2013)

  10. #7
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    Default Re: Help Fixing Code and Painting(Java Applet)

    thank you! i feel like i go on and finish this soon, perhaps by 12 tonight for at least the textfield and the labels. much appreciated.

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