Java中自定泛型方法

泛型用到哪些集合：List Set Map

List<String> list=new ArraList<String>();

list.add("美女");

list.add("帅哥");

list.add("芙蓉姐姐");

 

packagegeneric;

 

import java.util.Arrays;

 

import org.junit.Test;

 

/**

 * @author sunyb

 *

 */

public class genericTest1 {

     @Test

        public void run()

       {

              Integer []intArry= new Integer[]{1,2,3,4,5,6};

              change(intArry,1,4);

              System. out.println(Arrays.toString(intArry));

              String []strArr= new String[]{"aaaa","bbbb" ,"cccc" ,"dddd" ,"eeee" ,"ffff" ,"gggg" ,"ssss" };

              change(strArr,1,3);

              System. out.println(Arrays.toString(strArr));

              

       }

 

    

     public <T> void change(T[] arr,int i,int j)

     {

       

        T temp=arr[i];

        arr[i]=arr[j];

       arr[j]=temp;

     }

    

     /**

      * 修改下标为i,和j的元素值

      * @param strArr

      * @param i

      * @param j

      */

   /* private void change(String[] strArr, int i, int j) {

       String temp=strArr[i];

       strArr[i]=strArr[j];

       strArr[j]= temp;

       }*/

 

        /**

     * 修改下标为i,和j的元素值

     * @param intArry

     * @param i

     * @param j

     */

        /*private void change(int[] intArry, int i, int j) {

              

               int temp =intArry[i];

              intArry[i]=intArry[j];

              intArry[j]= temp;

       }*/

    

}

转载于:https://www.cnblogs.com/haofaner/p/5623547.html