如何定义一个泛型接口呢？

定义泛型接口语法

修饰符 interface接口名<代表泛型的变量> {  }
public interface MyGenericInterface<T> {
    // 抽象方法
    void method(T t);
}

 
public class MyGenericInterfaceImpl1 implements MyGenericInterface<String> {
    @Override
    public void method(String s) {
        System.out.println(s);
    }
}
 
public class MyGenericInterfaceImpl2<T> implements MyGenericInterface<T> {
    @Override
    public void method(T t) {
        System.out.println(t);
    }
}

public class TestMyGenericInterface {
    public static void main(String[] args) {
 
        //1.实现类 MyGenericInterfaceImpl1
        MyGenericInterfaceImpl1 g1 = new MyGenericInterfaceImpl1();
        g1.method("最爱java开发");
 
        // Arraylist<E> 实现了 List<E> 接口
        //2.实现类 MyGenericInterfaceImpl2
        MyGenericInterfaceImpl2<String> g2 = new MyGenericInterfaceImpl2<>();
        g2.method("hello java265.com");
 
        MyGenericInterfaceImpl2<Integer> g3 = new MyGenericInterfaceImpl2<>();
        g3.method(91232424);
    }
}