比较集合中的元素并将其设置为该集合的最后一个元素

时间:2015-02-09 23:11:37

标签: java java-ee arraylist collections

如何实现:

比较集合中的元素(不知道索引,因此可以使用contains / equals来比较字符串值),检查是否存在然后必须在该字符串值中添加一些字符(将从其他地方获取) )然后将它添加回集合中,作为最后一个元素。

示例场景:

xyz<Collection> contains these values:
"abc"
"hgj"
"jsh"
"yjk"

if (xyz.contains("jsh")){
then concat "jsh" + " " + randomOtherStuff
And put it back in the collection to be last element so when printed the order is 
"abc"
"hgj"
"yjk"
"jsh + " " + randomOtherStuff"
}

提前感谢您的帮助:D

1 个答案:

答案 0 :(得分:3)

if (collection.contains("jsh")) {
  collection.remove("jsh"); // remove it, so it can be re-added to the end
  collection.add("jsh " + "asdfgdfgsdfhsjdfh"); // add the new string + some random stuff to the end of the list
}