class Singleton {
private static Singleton instance =
null;
private Singleton(){}
public static Singleton getInstance(){
if(instance==
null){
synchronized(Singleton.
class){
if(instance ==
null){
instance=
new Singleton();
} } }
return instance;
}
}
public class TestSingleton{
public static void main(String[] args){
Singleton s1=
Singleton.getInstance();
Singleton s2=
Singleton.getInstance();
System.out.println(s1==
s2);
}
}
转载于:https://www.cnblogs.com/lzb0803/p/9003607.html
