java收集de

不用中间变量,实现值得交换
public void swap(int a ,int b){
b = a + b;
a = b - a;
b = b - a;
System.out.println(" a = " + a );
System.out.println(" b = " + b );
}
public void swap(int a ,int b){
a=a^b;
b=b^a;
a=b^a;
System.out.println(" a = " + a );
System.out.println(" b = " + b );
}