java中实现全局变量的功能

 1 package test.autorun;
 2 
 3 import java.util.LinkedList;
 4 import java.util.Queue;
 5 
 6 public class MyVar {
 7     private static int nCount=0;
 8     private static  Queue<String> queue=new LinkedList<String>();;
 9     public  int getnCount() {
10         return nCount;
11     }
12     public  void setnCount(int nCount) {
13         MyVar.nCount = nCount;
14     }
15     public Queue<String> getQueue() {
16         return queue;
17     }
18     public  void setQueue(Queue<String> queue) {
19         MyVar.queue = queue;
20     }  
21 
22 }

 1       MyVar myVar=new MyVar();
 2             
 3         myVar.getQueue().offer("Hello");
 4         myVar.getQueue().offer("World!");
 5         
 6            System.out.println(myVar.getQueue().size());  
 7            String str;  
 8            while((str=myVar.getQueue().poll())!=null){  
 9                System.out.print(str);  
10            }  
11            System.out.println();  
12            System.out.println(myVar.getQueue().size());