获取两个数组相同元素，不同元素，及相同元素不同元素新数组

废话不多说直接上代码！

        /**
         * 获取两个数组相同元素
         * @param a
         * @param b
         * @return
         */
        public static <T> Set<T> getIds(T[] a, T[] b){
              Set<T> same = new HashSet<T>();  //用来存放两个数组中相同的元素
              Set<T> temp = new HashSet<T>();  //用来存放数组a中的元素  

              for (int i = 0; i < a.length; i++) {
                  temp.add(a[i]);   //把数组a中的元素放到Set中，可以去除重复的元素
              }  

              for (int j = 0; j < b.length; j++) {
                //把数组b中的元素添加到temp中
                //如果temp中已存在相同的元素，则temp.add（b[j]）返回false
                if(!temp.add(b[j]))
                    same.add(b[j]);
            }
            return same;
          }  

        /**
         * 获取两个数组中不相同元素
         * @param t1
         * @param t2
         * @return
         */
        public static <T> List<T> compare(T[] t1, T[] t2) {
          List<T> list1 = Arrays.asList(t1); //将t1数组转成list数组
          List<T> list2 = new ArrayList<T>();//用来存放2个数组中不相同的元素
          for (T t : t2) {
              if (!list1.contains(t)) {
                  list2.add(t);
              }
          }
          return list2;
      }

        /**
         * 获取 两个数组不重复的元素值
         * @param array1
         * @param array2
         * @return
         */
        public static <T> List<T> getArrOnlyValue(T[] array1, T[] array2) {
           List<T> R_arr = new ArrayList<T>();
           Set<T> sameElementSet = getIds(array1,array2);
           for(T i : sameElementSet) {
               R_arr.add(i);
           }
           List<T> list = compare(array1,array2);
           for (int i = 0; i < array2.length; i++) {
               R_arr.add(list.get(i));
           }
           return R_arr;
        }

      public static void main(String[] arg){
         String[] array1 = {"1","2","3","4","1","2","4","6","7","8","10","22","33"};  

            String[] array2 = {"1","2","3","4","1","2","4","6","7","8","10","22","33","55","66","77","88","99"};  

            Set<String> sameElementSet = getIds(array1,array2);  

            List<String> arr = new ArrayList<String>();

            for(String i : sameElementSet) {
                arr.add(i);
                System.out.println(i);
            }   

            System.out.println("----------------------------");

            List<String> list = compare(array1,array2);
            for (String str : list) {
                arr.add(str);
                //System.out.println(str);
            }  

            for (String str : arr) {
                System.out.print(str+"\t");
            }  

      }  

原文地址：https://www.cnblogs.com/userzf/p/10742123.html