Question

用java程序写出实现两个数字的交换

Answer 1

package testchange;

public class Main {

/**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
int a=9;
int b=1;
change(a,b);
}
public static void change(int a,int b){
int c=0;
c=a;
a=b;
b=c;
System.out.println("a="+a);
System.out.println("b="+b);
}

}

Answer 2

public void swap(int a,int b){
a=a+b;
b=a-b;
a=a-b;
}

Answer 3

public void swap(object o1,object o2){
object temp;
o1=temp;
o1=o2;
o2=temp;
}