Java核心技术（初阶）知识点复习—

Java核心技术（初阶）知识点复习——常用代码块积累

1.计算阶乘

1 public static int factorialCalculation(int m){
2     if(m>1){
3         return m*factorialCalculation( m-1 )
4     }else{
5         return 1;
6     }
7 }

整个结构是“V”字型，注意递归函数调用的终止

2.两个数的交换

 1 public class MyNumber{
 2     private int num;
 3     public MyNumber(){return num;}
 4 
 5    MyNumber obj1 = new MyNumber（）;
 6    MyNumber obj2 = new MyNumber（）;
 7     
 8    public static void swap(MyNumber obj3, MyNumber obj4)
 9     {
10         int s = obj3.num;
11         obj.num = obj4.num
12         obj4.num = s;
13     }
14 }