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Thread: Why does it fill out the entire array instead of just one index?

  1. #1
    Junior Member
    Join Date
    Dec 2021
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    Default Why does it fill out the entire array instead of just one index?

     	private int anzahlWagen = 0;
    	static Wagen[] wagenList;
    	public static void main(String[] args){
    		wagenList = new Wagen[6];
    		for(int i = 0;i < wagenList.length;i++){
    			wagenList[i] = null;
    		for(int i = 0;i < wagenList.length;i++){
    	public static void addWagen(int pFirst, int pSecond){
    		boolean wagenAdded = false;
    		for(int i = 0;i < wagenList.length;i++){
    			if(wagenList[i] == null){
    				if(wagenAdded == false){
    				wagenAdded = true;
    				wagenList[i] = new Wagen(pFirst, pSecond);
    		wagenAdded = false;

    It adds the value 5 to all objects within the array. The class "Wagen" consists of two private int variables, and get-methods.

  2. #2
    Super Moderator Norm's Avatar
    Join Date
    May 2010
    On vacation
    Thanked 2,684 Times in 2,634 Posts

    Default Re: Why does it fill out the entire array instead of just one index?

    Can you print out the contents of the array and post it so I can see what you are asking about?
    Use the Arrays class's toString method to format the array for printing.
    System.out.println("the array= "+ java.util.Arrays.toString(theArrayName));

    Add some comments to the print out describing what is wrong and show what the desired output is.
    If you don't understand my answer, don't ignore it, ask a question.

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