trickyscope.java

Java程序设计技巧与开发实例附书源代码。

public class TrickyScope {
  static int x = 1;

  public static void method1() {
    int x = 10;
    x += 10;
  }

  public static void method2(int y) {
    x += 10;
    y += 20;
//  z += 30;
  }

  public static void main(String args[]) {
    int z = 3;
    method1();
    method2(z);
    x += 1;
//  y += 2;
    z += 3;
    System.out.println(x);
//  System.out.println(y);
    System.out.println(z);
  }
}