定义仅出现一次的静态字段，并使用给定类的所有实例共享的单个值。

 


class StaticDemo {
/*
 from 时代Java公众号 - nowjava.com 
*/

    public static boolean oneValueForAllObjects = false;

}

 

public class Main {

    public static void main (String[] args) {

        StaticDemo sd1 = new StaticDemo();

        StaticDemo sd2 = new StaticDemo();

        System.out.println(sd1.oneValueForAllObjects);

        System.out.println(sd2.oneValueForAllObjects);

        sd1.oneValueForAllObjects = true;

        System.out.println(sd1.oneValueForAllObjects);

        System.out.println(sd2.oneValueForAllObjects);
        /**
        时代Java公众号 - nowjava.com
        **/

    }

     

}