public class StaticDemo { public int a=10; private static StaticDemo s= new StaticDemo(); private StaticDemo(){ } public static StaticDemo getS(){//为使外部能访问 故此用static return s; } public static void main(String[] args) { //验证的d1和d2指向同一对象 StaticDemo d1=StaticDemo.getS(); StaticDemo d2=StaticDemo.getS(); d2.a=100; System.out.println(d1.a); } }
有知道这个有什么用处的大佬 还请留下您宝贵的见解 谢谢