java合并list

import java.util.ArrayList;

import java.util.List;

 

import com.google.common.collect.Lists;

 

private static void across() {

  String ids1 = "1,2,3,4";

  String ids2 = "3,4,5";

  String ids3 = "6,7,1";

  String[] temp1 = ids1.split(",");

  String[] temp2 = ids2.split(",");

  String[] temp3 = ids3.split(",");

  List<String> list1 = Lists.newArrayList(temp1);

  List<String> list2 = Lists.newArrayList(temp2);

  List<String> list3 = Lists.newArrayList(temp3);

  list1.removeAll(list2);

  list1.addAll(list2);

  list1.removeAll(list3);

  list1.addAll(list3);

  printStr(list1);

 }

 

Arrays.asList也能将数组装换为List,但返回的List大小已经固定，不支持removeAll,addAll。