泛型类

最新推荐文章于 2025-05-21 13:18:23 发布

原创最新推荐文章于 2025-05-21 13:18:23 发布 · 83 阅读

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CC 4.0 BY-SA版权

该博客展示了Java中泛型的使用，通过`Generic<T>`类的定义和使用，包括`getT()`和`setT(T)`方法，以及在`GenericDemo`类中的不同泛型实例，如`String`、`Integer`和`Boolean`。示例中还包含`Student`和`Teacher`类的创建和属性操作，强调了类型安全和泛型在实际编程中的应用。

package itheima_02;

public class Generic <T>{
    private  T t ;

    public T getT() {
        return t;
    }

    public void setT(T t) {
        this.t = t;
    }
}

package itheima_02;

public class GenericDemo {
    public static void main(String[] args) {
        Student s = new Student();
        s.setName("林青霞");
        System.out.println(s.getName());

        Teacher  t = new Teacher();
        t.setAge(30);
       // t.setAge("30");
        System.out.println(t.getAge());
        System.out.println("--------");

        Generic <String> g1 = new Generic<String>();
        g1.setT("林青霞");
        System.out.println(g1.getT());

        Generic<Integer> g2 = new Generic<Integer>();
        g2.setT(30);
        System.out.println(g2.getT());

        Generic<Boolean> g3 = new Generic<Boolean>();
        g3.setT(true);
        System.out.println(g3.getT());


    }
}

package itheima_02;

public class Student {
    private String name;

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }
}

package itheima_02;

public class Teacher {
    private  Integer age;

    public Integer getAge() {
        return age;
    }

    public void setAge(Integer age) {
        this.age = age;
    }
}