变量名称隐藏

public class Main {

  int num = 2017; // An instance variable/** from 时 代 J a v a - N o w J a v a . c o m**/

 

  void printNum(int num) {

    System.out.println("Parameter num: " + num);

    System.out.println("Instance variable num: " + num);

  }


  public static void main(String[] args) {

    Main a = new Main();

    a.printNum(2000);

  }

}