是否可能在java中的一个方法中返回两个Map值? java 返回两个list

public static List getDiffrent(List list1, List list2){
Map map = new HashMap(list1.size()+list2.size());
List diff = new ArrayList();
List maxList = list1;
List minList = list2;
if(list2.size()>list1.size()){
maxList = list2;
minList = list1;
}
for (String string : maxList){
map.put(string, 1);
}
for (String string : minList){
Integer cc = map.get(string);
if(cc!=null){
map.put(string, ++cc);
continue;
}
map.put(string, 1);
}
for(Map.Entry entry:map.entrySet()){
if(entry.getValue()==1)
{
diff.add(entry.getKey());
}
}
return diff;
}
public static void main(String[] args) {
List list1 =new ArrayList();
for(int i=1;i<10;i++) {
list1.add(i+"");
}
List list2 =new ArrayList();
for(int i=5;i<10;i++) {
list2.add(i+"");
}
List list3 =getDiffrent(list1,list2);
List list4 =getDiffrent(list2,list1);
System.out.println(list1);
System.out.println(list2);
System.out.println("不同值:"+list3);
System.out.println("不同值:"+list4);
}