public class TestDemo {
public static void swap(int[] array){
int tmp = array[0];
array[0] = array[1];
array[1] = tmp;
}
public static void main(String[] args) {
int[] array = {10,20};
System.out.println("交换前: "+array[0]+" "+array[1]);
swap(array);
System.out.println("交换后: "+array[0]+" "+array[1]);
}打印结果：
