static field(靜態欄位)

static field又可稱為類別欄位 , 顧名思義所有此類別創建的物件, 會共用此欄位值 , 如下例 :

 public class StaticField {  
      public static void main(String [] args){  
           Room.customer += 1;  
           Room room = new Room();  
           System.out.println(room.customer);  
      }  
 }  
 class Room {  
      static int customer = 0;  
 }