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Thread: Simple Java Program

  1. #1
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    Default Simple Java Program

    I have to make a program that will list all of the even numbers from 2-50. I have the basic part of it down but there is something wrong with it. The program is


    import java.io.*;
    class FilePrac3
    {
    public static void main (String args[])
    java.io.IOException
    {
    int count;
    for (int count = 2 ; count <= 50 ; count += 2)
    {
    System.out.println (count);
    System.out.println (count * count);
    }
    }
    }

    The error message says "Throws expected after this token".
    Any help would be greatly appreciated, thank you!


  2. #2
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    Default Re: Simple Java Program

    Youve got loads of irrelevant lines. and no need to declare 'count' integer twice. you do that in the first part of the for loop. Also you dont need the multiplication? You just want to print 2 4 6 8 10 12 etc. right?

    all you need is this:

            for (int count = 0; count <= 50; count += 2) {
                System.out.println(count);
     
            }
        }
    }

  3. #3
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    Default Re: Simple Java Program

    class FilePrac3
    {
    public static void main (String args[])
    java.io.IOException
    {
    for (int count = 0 ; count <= 50 ; count += 2)
    {
    System.out.println (count);

    }
    }
    }

    I made the change so now my program looks like this, but I still come up with the same error "Throws expected after this token"

  4. #4
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    Default Re: Simple Java Program

    I don't know why you're using the line

    java.io.IOException

    try getting rid of that see if that works.

  5. The Following User Says Thank You to Henry518 For This Useful Post:

    Robbiep (October 23rd, 2011)

  6. #5
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    Default Re: Simple Java Program

    Quote Originally Posted by Henry518 View Post
    I don't know why you're using the line

    java.io.IOException

    try getting rid of that see if that works.
    I tried it and it worked thank you! As you can tell I'm new to this so I'm making some silly mistake.

  7. #6
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    Default Re: Simple Java Program

    I'm willing to bet you're homework assignment asks you to print the numbers to a file, based on the calss name.

    If so, see Lesson: Basic I/O (The Java™ Tutorials > Essential Classes) for help

  8. #7
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    Default Re: Simple Java Program

    Quote Originally Posted by Robbiep View Post
    class FilePrac3
    {
    public static void main (String args[])
    java.io.IOException
    {
    for (int count = 0 ; count <= 50 ; count += 2)
    {
    System.out.println (count);

    }
    }
    }

    I made the change so now my program looks like this, but I still come up with the same error "Throws expected after this token"

    Like i said all you need is the lines i posted.

    Theres no need for any Exception handling here.

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