发现在Java中2的ArrayList之间的不同元素 [英] Finding the different elements between two ArrayLists in Java

问题描述

我怎么能知道在Java 2数组列表之间的不同的元素？我需要的确切元素没有可使用检索一个布尔值的removeAll（）。

How can I know the different element between 2 array list in java? I need the exact element not a Boolean value which can be retrieved using removeAll().

推荐答案

如果我理解正确你的问题，然后跟随在code方法非重叠下面应该让你即：

If I understood your question correctly then following method nonOverLap in the code below should get you that:

Collection union(Collection coll1, Collection coll2) {
    Set union = new HashSet(coll1);
    union.addAll(new HashSet(coll2));
    return union;
}

Collection intersect(Collection coll1, Collection coll2) {
    Set intersection = new HashSet(coll1);
    intersection.retainAll(new HashSet(coll2));
    return intersection;
}

Collection nonOverLap(Collection coll1, Collection coll2) {
   Collection result = union(coll1, coll2);
   result.removeAll(intersect(coll1, coll2));
   return result;
}

有关详细信息和上述解释：<一href=\"http://$c$c.hammerpig.com/find-the-difference-between-two-lists-in-java.html\">http://$c$c.hammerpig.com/find-the-difference-between-two-lists-in-java.html

For more details and explanation of above: http://code.hammerpig.com/find-the-difference-between-two-lists-in-java.html

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