Java核心技术（初阶）知识点复习——常用代码块积累

1.计算阶乘

public static int factorialCalculation(int m){
    if(m>1){
        return m*factorialCalculation( m-1 )
    }else{
        return 1;
    }
}

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

public class MyNumber{
    private int num;
    public MyNumber(){return num;}
 4 
   MyNumber obj1 = new MyNumber（）;
   MyNumber obj2 = new MyNumber（）;
    
   public static void swap(MyNumber obj3, MyNumber obj4)
    {
        int s = obj3.num;
        obj.num = obj4.num
        obj4.num = s;
    }
}