swapArry

class swapFun {static void swap(int i,int j){int tmp=i;i=j;j=tmp;}public static void main(String[] args) {int i=1;int j=2;swap(i,j);System.out.printf("i:%d,j:%d\n",i,j);}}/*i:1,j:2请按任意键继续. . .*/

class swapArry{public static int[] swap(int a1, int a2){      int tmp = a1;      a1 = a2;      a2 = tmp;      return new int[]{a1,a2};  }   public static void main(String[] args) { int a = 4;  int b = 5;    int[] swap = swap(a, b);  a = swap[0];  b = swap[1];  System.out.println(a+"  "+b);  System.out.println("Hello World!");}}/*5  4Hello World!请按任意键继续. . .*/