package com.xiaolin.basic;

/**

 * 泛型：将运行期遇到的问题转移到了编译期，省去了强转的麻烦

 * val1,val2

 *  @author: xiaolin

 *  @Date: 2021/6/11 22:49

 *  @Description:

 */

public class LocalPair<K,V> {

    private K k;

    private V v;

    public LocalPair(K k, V v) {

        this.k = k;

        this.v = v;

    }

    public K getK() {

        return k;

    }

    public V getV() {

        return v;

    }

}

package com.xiaolin.basic;

import java.util.Date;

public class LocalPairApp {

    public static void main(String[] args) {

        LocalPair<String,String> pair = foo1();

        String k = pair.getK();

        String v = pair.getV();

        String[] arrs = k.split(",");

        String[] arrs2 = v.split(",");

        for (String s:arrs){

            System.out.println(s);

        }

        for (String b:arrs2){

            System.out.println(b);

        }

    }

    public static LocalPair<String,String> foo1(){

        LocalPair<String,String> pair1 = new LocalPair<>("abc,rer","bcd,oiu");

        return pair1;

    }

    public static LocalPair<String,Integer> foo2(){

        LocalPair<String,Integer> pair2 = new LocalPair<>("bdsd",123);

        return pair2;

    }

    public static LocalPair<String, Date> foo3(){

        LocalPair<String,Date> pair3 = new LocalPair<>("bdsd",new Date());

        return pair3;

    }

}