com.google.common.collect.Lists

 

 

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{     List<Integer> list = Lists.newArrayList();//创建空集合     List<Integer> list_2 = Lists.newArrayList(1, 2, 3);//快速初始化集合     System.out.println(list_2); }   {     List<Integer> list1 = Lists.newArrayList(1, 2, 3);     List<Integer> list2 = Lists.newArrayList(4, 5);     List<List<Integer>> productList = Lists.cartesianProduct(list1, list2);//将两个集合做笛卡尔积     System.out.println(productList); }   {     List<Integer> list = Lists.newArrayList(1, 2, 3, 4, 5);     List<List<Integer>> partitionList = Lists.partition(list, 2);//将一个大集合分成若干个小集合(分页)     System.out.println(partitionList); }   {     List<String> list = Lists.newArrayList("a","b","c");     List<String> transformList = Lists.transform(list, x -> x.toUpperCase());//把某个集合转换成另外一个集合(流处理)     System.out.println(transformList); }   {     List<Integer> list = Lists.newArrayList(3, 1, 2);     List<Integer> reverseList = Lists.reverse(list);//颠倒顺序     System.out.println(reverseList); }