Variable Argument Parameters List in Java (Var-args)

Java 5.0 supports invoking methods with a variable number of arguments (Var-args). The variable arguments are received in the method parameter as an array object. There can be only one variable argument parameter in a method and it must be the last one in the order of parameters. The variable-argument parameter is declared in the method as follows:

[type of parameter][ellipsis (three dots)][white-space][name of array variable]

For example, the following declares a String-type var-arg, and the arguments are stuffed in a String array:

String... strArray

package info.icontraining.core;

public class VarargExample {

   public static void main(String[] args) {
      varargMethod(true, "A", "B", "C");
      varargMethod(false,"E", "F");
      varargMethod(true, "G", "H", "I", "J");
   }
 
   public static void varargMethod(boolean b, String... names) {
      System.out.println("Number of var-arg values: " + names.length);
      for (String s: names) {
         System.out.print(s + " ");
      }
      System.out.println();
   }
}