单例模式

package danlimoshi;

public class FactoryTest {
    public static void main(String[] args) {
        Factory factory=Factory.getFactory();
        System.out.println("factory  "+factory);
        Factory factory2=Factory.getFactory();
        factory2.setFactory("张三", 20);
        System.out.println("factory2  "+factory2+"factory  "+factory);
        System.out.println(factory==factory2);
    }
}

 class Factory {
    private static Factory factory = new Factory();
    private static String name="单例模式";
    private static int age=18;
    private Factory(){};

    static Factory getFactory() {
        return factory;
    }
    
    static void setFactory(String name,int age) {
        Factory.name=name;
        Factory.age=age;
    }

    @Override
    public String toString() {
        return "Factory [name="+name+", age="+age+"]";
    }
    
    
}

factory  Factory [name=单例模式, age=18]
factory2  Factory [name=张三, age=20]factory  Factory [name=张三, age=20]
true