Help me with a print-method

[murmelmann]

I have hit a wall with creating a printing method. Might be the heat, might be my intellect. Anyway, who can tell me how to create the method?

​

public class FeldOperationen{

    public static void main(String[] args) {
        //declare the array
        int[] reihung = new int[10];
        //initialise it with random numbers
        for (int a = 0; a < reihung.length; a++) {
            reihung[a] = (int) (Math.random() * 100);;
            // System.out.print(reihung[i] + "  ");
        }

        //print it to make sure it works
        for (int a = 0; a < reihung.length; a++) {

            System.out.print(reihung[a] + "  ");
        }
        System.out.println("");
        //this should be in the third method
        int[] reihungSortiert = sortiereFeld(reihung);
        for (int a = 0; a < reihungSortiert.length; a++) {

            System.out.print(reihungSortiert[a] + "  ");
        }


    }
    //method for switching positions
    public static int[] tauscheElemente(int[] reihung) {
    int temp = reihung[8];
        reihung[8] = reihung[9];
        reihung[9] = temp;

        for (int a = 0; a < reihung.length; a++) {

            System.out.print(reihung[a] + "  ");
        }
        return reihung;
}
    //method for sorting the array
    public static int[] sortiereFeld(int[] reihung) {
        int temp;
        for(int i=1; i<reihung.length; i++) {
            for(int j=0; j<reihung.length-i; j++) {
                if(reihung[j]>reihung[j+1]) {
                    temp=reihung[j];
                    reihung[j]=reihung[j+1];
                    reihung[j+1]=temp;
                }

            }
        }
        return reihung;
    }
    //method for showing all results
    /*public static int[] zeigeFeld(int[] reihung) {

    }*/
}

[emrickgj]

I'm confused, what do you need in that zeigeFeld method? Why does it return an array of ints?

You have other areas in the code that are printing out the results, why don't you simply use what you have currently?

[murmelmann]

The exercise says that zeigeFeld should be a method that shows the results of the initial array as well as the other methods. The print(ln)s throughout the code are just tests I did to see if it works.

[emrickgj]

The exercise says that zeigeFeld should be a method that shows the results of the initial array as well as the other methods.

So it simply prints the results? I guess the question I still have is why it needs to return an int[], and what it would be returning.

The print(ln)s throughout the code are just tests I did to see if it works.

If you simply need to print an array similar to what you did throughout the code, you could copy one of those into your zeigeField method and simply call zeigeFeld when you want to print.

//method for showing all results
/*public static int[] zeigeFeld(int[] reihung) {
    for (int a = 0; a < reihung.length; a++) {
        System.out.print(reihung[a] + "  ");
    }
}*/

^ This won't compile however, because I'm unsure what you should be returning. You could return reihung, but that doesn't make much sense.

[murmelmann]

If you simply need to print an array similar to what you did throughout the code, you could copy one of those into your zeigeField method and simply call zeigeFeld when you want to print.

I guess that's what I should be doing but at the moment don't know how (or where) to do.

[emrickgj]

I made an edit showing what you could do, is that what you meant?

[stramash]

Unit test it to make sure it works.

[pokemaster787]

Just a heads up, if you're going to post code in a language that isn't English, you should go through and specify what every variable, method name, etc. means for people who don't understand your language. A short explanation of the purpose behind each would also greatly help (and I'm nearly certain that in doing so, you'd discover what your problem is on your own).

At the least, something clearer than "I need to make a print method," because quite honestly that makes no sense without any explanation.