Java中的泛型

public class MyClass<E> {
    public void print(E e) {
        System.out.println(e);
    }
}

public class GenericTest {
    public static void main(String[] args) {
        MyClass<String> myClass1 = new MyClass<>();
        myClass1.print("String"); // String

        MyClass<Integer> myClass2 = new MyClass<>();
        myClass2.print(111); // 111
    }
}

public interface MyInter<T> {
    public abstract void print(T t);
}

public class MyInterImpl2<T> implements MyInter<T> {
    @Override
    public void print(T t) {
        System.out.println(t);
    }
}

public class GenericTest {
    public static void main(String[] args) {
        MyInter<String> myInter2 = new MyInterImpl2<String>();
        myInter2.print("String"); // String
        MyInter<Integer> myInter3 = new MyInterImpl2<>();
        myInter3.print(111); // 111

        MyInter<String> myInter = new MyInter<String>() {
            @Override
            public void print(String s) {
                System.out.println(s);
            }
        };
        myInter.print("字符串类型"); // 字符串类型

        new MyInter<Integer>() {
            @Override
            public void print(Integer integer) {
                System.out.println(integer);
            }
        }.print(222); // 222
    }
}