Java 单例模式
饿汉式
class Singleton {
private static Singleton instance=new Singleton();
private Singleton(){}
static Singleton getInstance() {
turn instance;
}}
懒汉式
class Singleton {
private static Singleton instance=null;
private Singleton(){}
static Singleton getInstance() {
if(instance==null)
instance=new Singleton();
return instance;
}}