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Thread: Help with school project

  1. #1
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    Default Help with school project

    Hi, im new to this forum and to java as well, my name is Matti and are from Iceland

    im trying to make number sequence with one TextArea and one Button, using '\n' and '\t'
    the result should look like this:
    1 1 1
    2 3 4
    3 5 9
    . . .
    . . .
    . . .
    15 29 225

    row 1: line number, row 2: odd number, and row 3: is sum of the numbers in row 2 1 - 1+3 - 1+3+5 and so on

    this is what i got so far:
    import java.applet.Applet;
    import java.awt.*;
     
    public class talnarod extends Applet
    {
    	TextArea Ttafla;
    	Button Bstart;
    	int i, a, b, c;
     
    	public void init()
    	{
    		Bstart = new Button("Start");
    		Ttafla = new TextArea(15,25);
     
    		this.add(Bstart);
    		this.add(Ttafla);
    	}
    	public boolean action(Event e, Object o)
    	{
    		if (e.target == Bstart)
    		{
    			for (a=1; a <= 15; a++) // here is the column 1: number 1 to 15
    			{
    				for(b=1; b <= a; b++) // here is were i fail, column 2: odd numbers 1 to 29 
    				{
    				if( b % 2 != 0) // and after this i need column 3: sum of the numbers in column 2
    				Ttafla.appendText("" + a + '\t' + b + '\n');
    				}
    			}
    			return true;
    		}
    		return false;
    	}
    }
    thanks and regards
    Matti


  2. #2
    Super Moderator Norm's Avatar
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    Default Re: Help with school project

    this is what i got so far:
    Please post the output from the program and add some comments describing what is wrong with it.

    Please edit your post and wrap your code with
    [code=java]
    <YOUR CODE HERE>
    [/code]
    to get highlighting and preserve formatting.
    If you don't understand my answer, don't ignore it, ask a question.

  3. #3
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    Default Re: Help with school project

    solved
    import java.applet.Applet;
    import java.awt.*;
     
    public class talnarod extends Applet
    {
    	TextArea Ttafla;
    	Button Bstart;
    	int i, a, b, c;
     
    	public void init()
    	{
    		Bstart = new Button("Start");
    		Ttafla = new TextArea(15,25);
     
    		this.add(Bstart);
    		this.add(Ttafla);
    	}
    	public boolean action(Event e, Object o)
    	{
    		if (e.target == Bstart)
    		{
    			for (a=1; a <= 15; a++) //here i set the length of the sequence 1 to 15
    			{
    				b = a+a-1; //odd numbers for second column
    				c = 1; //and here i need help !!!
    				Ttafla.appendText("" + a + '\t' + b + '\t' + c + '\n');
    			}
    			return true;
    		}
    		return false;
    	}
    }

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