黑马程序员——java基础学习日记（10）

-------android培训、java培训、期待与您交流！
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单例设计模式

1、饿汉式

class Single{

                      private static Single s=new Single();

                      private single(){}

                      public static Single getInstance(){

                           return s;

                     }

}

2、懒汉式

class Single{

                  private static SIngle s=null;

                  private single(){}

                  public static SinglegetInstance(){

                          if(s==null)

                                 s=new Single();

                          return s;

                  }

}