如何将 List<List<String>>中包含相同元素的List进行搜索重组

Question

• 假设一个List里面包含多个List:
  <"apple", "banana">,<"ball", "pen"> <"apple", "orange">, <"grape", "orange">,<"paper","ruler">,<"ink","pen">
  如何将每个List进行重复比对，并将含有相同元素的List合并，最后形成一个新的List>：
  <"apple","banana","orange","grape">,,<"paper","ruler">

  也可理解为："A=B","C=D","A=E","F=E","G=H","I=D" => 
  "A=B=E=F","C=D=I","G=H"

  请诸位不吝指教，谢谢！

Answer 1

（1）Colletions.disjoint来判断是否有交集（2）在有交集的时候进行合并，合并的时候转换为不重复的集合类Set，使用Set的addAll方法合并