Draaiom

public class draaiom{
    public static void main(String[] args){
        String ja = "ja";
        String nee = "nee";
        String hulp;
        hulp = ja;
        ja = nee;
        nee = hulp;
        System.out.println(nee);
        System.out.println(-20);
    }
}

Source: blackboard.hhs.nl

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