题解 | #统计输入正数个数#
创建单例对象
http://www.nowcoder.com/practice/9b316cd2d6264776918bc4bc31f37aec
饿汉式
public class Main {
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 = new Singleton();
private Singleton() {
}
//write your code here......
public static Singleton getInstance() {
return instance;
}
}
，这个代码不商用是没问题的