java泛型

package com.boxfishedu.test;


/**
 * Created by JiangTengfei on 16/4/26.
 */

class Hello {
    @Override
    public String toString() {
        return "Hello{}";
    }
}


public class Test<K, V> {

    public K getK(K k) {
        return k;
    }

    public <N> N getN(N n) {
        return n;
    }

    public <M> M getM(Class<M> m) throws IllegalAccessException, InstantiationException {
        return m.newInstance();
    }

    public static void main(String[] args) throws InstantiationException, IllegalAccessException {

        //new Test<>() 与 new Test() 表现不一样
        final Object n = new Test().getN(new Hello());
        final Hello n1 = new Test<>().getN(new Hello());

        final Object m = new Test().getM(Hello.class);
        final Hello m1 = new Test<>().getM(Hello.class);

        System.out.println(n1);
    }
}