public class 分派 {
    public static void main(String[] args) {
        Human man = new Man();
        // 重写是 虚函数的源由（invokevirtual 所以对字段无效），看实际类型 即‘后者’
        man.printCode();
        // man.code是不是方法，所以输出是 Human.code即3
        System.out.println("code " + man.code);
//      Human women = new Women();
        // 重载 看编译类型 即‘前者’（对于char类型依次：char > int > long > float > double > 变长类型）
//      sayHello(man);
//      sayHello(women);
    }

    static void sayHello(Human humam) {
        System.out.println("human sayHello");
    }


    static void sayHello(Man man) {
        System.out.println("man sayHello");
    }


    static void sayHello(Women women) {
        System.out.println("women sayHello");
    }


}

class Human {
    public int code = 2;

    public Human() {
        code = 3;
        printCode();
    }

    void printCode() {
        System.out.println("Human code " + code);
    }

}

class Man extends Human {

    public int code = 0;

    public Man() {
        code = 1;
        printCode();
    }

    void printCode() {
        System.out.println("Man code " + code);
    }

}

class Women extends Human {

}

• “覆盖”私有方法

public class 分派2 {
    // 声明为private，输出为 Shape
    private void print() {
        System.out.println("Shape");
    }
    public static void main(String[] args) {
        分派2 s = new Derived();
        s.print();
    }
}
class Derived extends 分派2{
    public void print() {
        System.out.println("Circle");
    }
}