connectionmanager.java

thinking in java 第三版 第五章 11题 答案

class Connection {
      private Connection() {}
      public static Connection Makeconnection(){
            return new Connection();
      }
}
 

public class ConnectionManager {
      static int  flag=0;
      public static Connection[] manage(){
      	
        Connection[] a={Connection.Makeconnection(),Connection.Makeconnection()};  
        flag=2;    
      	return a;
      	}
         
      public static void main (String[] args){
            if(manage()!=null&&flag>0)
            System.out.println("a fixed array of Connection objects has been created.");
      }
}