如何使用方法重載處理使用可變參數作為輸入？

解決方法

本示例顯示如何重載具有可變參數作為輸入的方法。

public class Main {
   static void vaTest(int ... no) {
      System.out.print("vaTest(int ...): " 
      + "Number of args: " + no.length +" Contents: ");
      for(int n : no)
      System.out.print(n + " ");
      System.out.println();
   }
   static void vaTest(boolean ... bl) {
      System.out.print("vaTest(boolean ...) " +
      "Number of args: " + bl.length + " Contents: ");
      for(boolean b : bl)
      System.out.print(b + " ");
      System.out.println();
   }
   static void vaTest(String msg, int ... no) {
      System.out.print("vaTest(String, int ...): " +
      msg +"no. of arguments: "+ no.length +" Contents: ");
      for(int  n : no)
      System.out.print(n + " ");
      System.out.println();
   }
   public static void main(String args[]){
      vaTest(1, 2, 3);
      vaTest("Testing: ", 10, 20);
      vaTest(true, false, false);
   }
}

結果

上麵的代碼示例將產生以下結果。

vaTest(int ...): Number of args: 3 Contents: 1 2 3 
vaTest(String, int ...): Testing: no. of arguments: 2 
Contents: 10 20 
vaTest(boolean ...) Number of args: 3 Contents: 
true false false