JAVA Singleton Synchronize

package patterns.singleton.synchronize2;

/**

 * @authorshengshu

 *

 */

publicclassPerson {

    privatestaticPerson person;

 

    privateStringname;

 

    publicString getName() {

          returnname;

    }

 

    publicvoidsetName(String name) {

          this.name = name;

    }

 

    privatePerson() {

 

    }

 

    publicstaticPerson getPerson() {

          if(person ==null) {

              synchronized (Person.class) {

                   if(person ==null) {

                       person =new Person();

                   }

              }

          }

          returnperson;

    }

}

====================================================================================

publicclass Test {

    publicstatic void main(String[] args) {

          Personperson1 = Person.getPerson();

          Personperson2 = Person.getPerson();

 

          person1.setName("Mary");

          person2.setName("Lily");

 

          System.out.println(person1.getName());

          System.out.println(person2.getName());

    }

}