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  1. #1
    Skyton is offline Member
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    Default Having trouble with Classes

    Hi,

    I'm using Eclipse to develop a simple program, but I'm new to Java and don't know what I'm doing wrong. Eventually, I want this to be an applet, but for now, I'm implementing a JFrame. I'm having trouble calling a method from a child class. Eclipse is telling me I did something wrong, but I don't know what. Here's the call to the method.

    package testP;
    import javax.swing.*;
    import java.awt.event.*;
    import java.awt.*;
    import java.io.*;
    import java.util.*;
    public ArrayList<String>[] questions, corAnswers, uAnswers;
    public Test() {
    public class Test extends JFrame implements ActionListener {
    addQ(newQuestion);

    //and the class and method itself:
    package testP;
    import java.util.ArrayList;
    public class MakeTest extends Test {
    ArrayList<String> q;
    ArrayList<String> a;
    public MakeTest() {

    public ArrayList<String> addQ(String question) {

    q.add(question);
    return q;
    }
    }}
    I can't find anythig specific on why the call isn't working in this or other forum sites. Any help is appreciated!
    Last edited by Skyton; 03-03-2011 at 06:20 PM.

  2. #2
    KevinWorkman's Avatar
    KevinWorkman is offline Crazy Cat Lady
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    Default

    First off, stop blaming your problem on eclipse or a lack of documentation. It's a basic syntax error, which is your fault. A good programmer blames him/herself first. Doing anything else is usually just wasting time.

    Secondly, look at the method declaration, then look at how you're calling it. Those look like two completely different methods to me. One is addQ and takes one argument, the other is addQA and takes two arguments. What are you actually trying to do here?

    If you want help, you'll have to post an SSCCE that demonstrates what you're actually doing.
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  3. #3
    simabirk Guest

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  4. #4
    Muskar is offline Member
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    Default

    Firstly your setup is very weird. You have variables outside of your class body and non of them are initialized. It seems like you're skipping too fast ahead in learning to program.
    I think you should start more simple with something like:

    Java Code:
    package testP;
    
    public class ThisIsAClass {
    private int thisIsAnIntegerVariable;
    private int thisIsAnInitializedIntegerVariable = 42;
    public ThisIsAClass(int thisIsAnIntegerVariable) { //This is the constructor
    this.thisIsAnIntegerVariable = thisIsAnIntegerVariable; //The variabel is now initialized.
    }
    
    public void thisIsAMethod() {
    System.out.println("This method prints in the console.");
    System.out.println("And prints our thisIsAnIntegerVariable out:" + thisIsAnIntegerVariable);
    }
    }
    But as Kevin said, if you have a problem, post an SSCCE so people easily can answer your question.

  5. #5
    weerrienuck is offline Member
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  6. #6
    Skyton is offline Member
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    Default

    Ok, y'know what? I'm sick of the pretentiousnous of every Java programmer that has responded to my problem. I want all of you who responded or thought of responding to read this. I KNOW HOW TO WRITE PROGRAMS. The project I'm working on in Java is DONE IN 2 OTHER LANGUAGES! I just finished a Java class and was trying to practice what I had learned. By no means am I a master of any of the languages, but what I'm tryng accomplish in Java I've already done before. Its what I use to learn new programming languages.

    But if this is how Java programmers act, then forget it. I can just ask an instructor at school, or try and figure it out on my own. Why even be part of a help forum if you're just going to insult the people who come on here? Do your lives suck that much? Or have you all forgotten how to deal with flesh and blood in favor of computers?

    The two of you who posted a response on this forum, don't bother responding. Just go back to your self-importance and arrogance. I will not be posting anything else. If you're insulted, or you were really trying to help, don't bother trying to tell me so. I hope your both single because if you're not, I feel REALLY sorry for you significant others. LEARN TO TREAT PEOPLE WITH RESPECT, and you MIGHT get a better response.

    May the Lord bless you and keep you. You will not hear from me again.

  7. #7
    KevinWorkman's Avatar
    KevinWorkman is offline Crazy Cat Lady
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    Wow.

    Nothing either of us said was pretentious or hurtful. I told you that it was your fault, not eclipse's, which is true. And the other poster pointed out some of your mistakes and implied that skipping straight to GUI programming might not be the best way to learn.

    I tried to explain this to you when you messaged me privately yesterday.

    If you can't deal with that, then I'd suggest that programming is not for you. It's a very "this is correct, this is incorrect" art. If you can't deal with the realities of that, then I'd suggest you find another hobby/profession/major.
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  8. #8
    Tolls is offline Moderator
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