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Thread: Please help wih JAVA!!

  1. #1
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    Default Please help wih JAVA!!

    I have a question from class and need to write a simple main program that would print out any command line arguments in reverse.
    Im still quite new to Java as this is my first course.

    An example of what the program would do was given:

    example. javac Test.java
    java Test one two three
    three two one

    java Test 4 1 Hello
    Hello 1 4


    Thank you to anyone who can help me, life saver!


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    Default Re: Please help wih JAVA!!

    What have you tried? Post the code you are working on ask ask some specific questions about the problems you are having. Be sure to wrap the code in code tags.
    If you don't understand my answer, don't ignore it, ask a question.

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    Default Re: Please help wih JAVA!!

    Most beginning Java courses don't introduce Arrays until mid to late in the course, if at all. This assignment requires some moderate to advanced understanding of Arrays, so it's either a poorly timed assignment, or you should be able to write enough code to get this program started. Either way, start here, try to start the program, then post the results with specific questions, errors you want help with, etc.

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    Default Re: Please help wih JAVA!!

    Quote Originally Posted by GregBrannon View Post
    Most beginning Java courses don't introduce Arrays until mid to late in the course, if at all. This assignment requires some moderate to advanced understanding of Arrays, so it's either a poorly timed assignment, or you should be able to write enough code to get this program started. Either way, start here, try to start the program, then post the results with specific questions, errors you want help with, etc.
    Yea its the first semester and I am totally lost, all i have is this:
    code to show how to go reverse in an array but im not sure what to do for command line arg.

    int[]a = new int[2]
    a[0] = 2;
    a[1] = 3;
    a[2] = 5;

    for(int i =a.length-1; i >=0; i --)
    System.out.println(a[i]);


    Im not sure what to do at all, i was hoping i could recieve some help.

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    Default Re: Please help wih JAVA!!

    What is the int array for? Do you understand what they mean by command line arguments?

    java Test one two three

    The Strings one two and three will be inserted into a String array and passed into your main method as a parameter. To the args parameter to be exact. So you need to write a loop that will iterate over the args array and print out all the elements.
    Improving the world one idiot at a time!

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    Default Re: Please help wih JAVA!!

    Its a midterm question that i didnt know, all it said was "write a main program that would print out any command line arguments in reverse"

    Im not too sure how to set up the main program, i understand that it will call on the procedure, Im just not sure how to set it up.

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    Default Re: Please help wih JAVA!!

    The loop in the code posted above is on the right track you just need to use the args array and not some other array you created.
    Improving the world one idiot at a time!

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    Default Re: Please help wih JAVA!!

    Start by making a copy of the small program at the "here" link in post#3. Copy and execute that to see what happens. Then make some changes to the code to experiment.
    If you don't understand my answer, don't ignore it, ask a question.

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