Variable parameter comparisons in C # and Java

Variable parameters in C # with the keyword params

Codepublic class App {        static void Main () {            //general use Method            Console.WriteLine (ADD (New int32[] {1, 2, 3, 4, 5})) ;            Another method of calling            Console.WriteLine (ADD (1, 2, 3, 4, 5));            Of course, the number of parameters is variable, but its type is constrained by the            Console.WriteLine (ADD (1, 2, 3, 4, 5, 6, 7, 8, 9, ten, one, one, one, and many));            What if the type is variable and the number is variable? The answer to the book is very simple, which is to use the object type            //Note down}//<summary>//        Use the params keyword        </summary>        //<param Name= "values" >int[]</param>        //<returns>int[] and </ returns>        static Int32 Add (params int32[] values) {            Int32 sum = 0;            for (int x = 0; x < values. Length; x + +)                sum + = values[x];            return sum;

Three dots in Java ...

1), can only appear at the end of the parameter list;

2) 、... Between the variable type and the variable name, there are no spaces before and after it can be;

3), when invoking a variable parameter method, the compiler implicitly creates an array for the variable parameter, accessing the mutable parameter in the form of an array in the method body.

public class Varable {
public static void Main (String [] args) {
System.out.println (Add (2,3));
System.out.println (Add (2,3,5));
}
public static int Add (int x,int ... args) {
int sum=x;
for (int i=0;i<args.length;i++) {
Sum+=args[i];
}
return sum;
}
}

Variable parameter comparisons in C # and Java