题解 | #创建单例对象#
public class Main { //上CSDN学习了一手才看明白 public static void main(String[] args) { Singleton s1 = Singleton.getInstance(); Singleton s2 = Singleton.getInstance(); System.out.println(s1 == s2); }
}
class Singleton {
private static Singleton instance;
private Singleton() {
}
//write your code here......
public static Singleton getInstance(){
if(instance == null){
instance = new Singleton();
}
return instance;
}
}
