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Thread: Help with school project

  1. #1
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    Default Help with school project

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

    i´m 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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