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【泛型-胡乱砍】

article 2024/11/15 16:51:24

泛型-胡乱砍

1.define base interface
2.define a child interface
3. define a implement class
4.其他：辅助类
5.泛型--胡乱砍的说明

1.define base interface

public interface Generation<T,R,Entity> {
    R getName(T t, Entity entity);
}

2.define a child interface

public interface ERGeneration<T extends Person, R extends String, 
							Entity extends Person> extends Generation<Person, String, Number> {
    R erStatus(T t, Entity entity);
}

3. define a implement class

package cn.gbase.admin.plugin.controller.test;

import java.util.List;

public class ERGenerationImpl<T extends Person,R extends String,
								Entity extends Child> implements ERGeneration<T, R, Entity> {

    public static void main(String[] args) {
        ERGenerationImpl<Person,String,Child> generation = new ERGenerationImpl<>();
        generation.erStatus(new Person("zhangsan",88),new Child("孙子1",2));
        generation.erStatus(new Child("tt",23),new Child("孙子2",2));

    }

    //@Override
    //public R erStatus(T t) {
    //    return null;
    //}

    public R test(List<? super Child> list){
        Person p = (Person) list.stream().findFirst().get();
        return (R) p.getName();
    }

    @Override
    public String getName(Person person, Number number) {
        return null;
    }

    @Override
    public R erStatus(T t, Entity entity) {
        return null;
    }
}

4.其他：辅助类

// person类
import lombok.Data;

@Data
public class Person {
    private String name;
    private int age;

    public Person(String zhangsan, int i) {
    }
}
// Child类
public class Child extends Person{
    public Child(String name, int age) {
        super(name, age);
    }
}