Java |功能|问题4

class intWrap {
   int x;
} 
public class Main { 
    public static void main(String[] args) {
       intWrap i = new intWrap();
       i.x = 10;
       intWrap j = new intWrap();
       j.x = 20;
       swap(i, j);
       System.out.println("i.x = " + i.x + ", j.x = " + j.x);
    } 
    public static void swap(intWrap i, intWrap j) {
       int temp = i.x;
       i.x = j.x;
       j.x = temp;
    }
}

(A) ix = 20，jx = 10
(B) ix = 10，jx = 20
(C) ix = 10，jx = 10
(D) ix = 20，jx = 20答案： (A)
说明：根本不会传递对象。仅引用被传递。变量的值始终是基元或引用，而不是对象
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