Tips for using variable parameters in a Java method

I haven't written logs for a long time. Recently, due to project shortage, I am studying some Java reflection mechanisms. I want to use this mechanism to better improve and encapsulate the project and code. Today, when I am studying reflection, shenyang binzi encountered a problem that there was a variable parameter when encapsulating a method. The following methods and techniques were found through searching the Internet.

When writing a Java program, multiple parameters are required for a method. For example, a summation method:

Public int add (int [] list) {int sum = 0; for (int I = 0; I
 
  
Reload method:
  

  

  

  
public int add(int a,int b){   return a + b;}public int add(int a,int b,int c){   return a + b + c;}
  
JDK 5 optimizes the for loop and can be used to write more concise code:
  

  

  

  
public int add(int... list){   int sum = 0;   for (int item:list)    sum += item;   return sum;}
  
TIPS:
  

  

  
Add (int... list), three points represent a variable number of parameters. I believe this is unknown to many Java learners.
  
In addition, variable parameters must be placed at the end of all parameters, such
  
Add (int... list, int)Yes,Add (int a, int... list)Is correct.
  
Reference: http://www.cnblogs.com/yezhenhan/archive/2012/08/08/2628835.html