class Singleton{
private static Singleton instance;//内部实例化对象
public static Singleton getInstance(){
if(instance == null){
instance = new Singleton();
}
return instance;
}
private Singleton(){} //构造方法私有化
public void print(){
System.out.println("hellow word");
}
}
public class Lxd{
public static void main(String[] args) {
Singleton s = null; //声明对象
s = Singleton.getInstance(); //直接访问Static属性
s.print(); //使用方法
}
}
class Singleton{
private static final Singleton instance = new Singleton();//内部实例化对象
public static Singleton getInstance(){ //调用实例对象的方法
return instance;
}
private Singleton(){} //构造方法私有化
public void print(){
System.out.print("hello");
}
}
public class LxdT {
public static void main(String[] args) {
Singleton s = Singleton.getInstance(); //类名.方法名调用
s.print(); //使用方法
}
}
