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Thread: Why is the swap method static?

  1. #1
    Junior Member
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    Default Why is the swap method static?

    Bellow I have some code and I was interested in understanding why this method works when it is static? I expected the opposite

    public class demo {
    	int no;
     
    	demo(int no){
    		this.no=no;
    	}
     
    	public static void swap(demo c1, demo c2) {
    		int temp = c1.no;
    		c1.no = c2.no;
    		c2.no = temp;
    	}
     
    	public static void main(String args[]) {
    		demo c1 = new demo(1);
    		demo c2 = new demo(2);
    		swap(c1, c2);
    	    System.out.println("c1.no = " + c1.no); 
    	    System.out.println("c2.no = " + c2.no); 
    	}
     
    }

  2. #2
    Super Moderator Norm's Avatar
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    Default Re: Why is the swap method static?

    The swap method does not use any class instance variables. It accesses variables via object references passed to it.
    If you don't understand my answer, don't ignore it, ask a question.

  3. The Following User Says Thank You to Norm For This Useful Post:

    jenniferruurs (October 4th, 2019)

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