i'm having 2 string array,
str1[] = {"a","b","aa","c"}
and
str2[] = {"aa","a","b","c","d"}
how can i compare and remove value if exist in both string[], expected result, str3[]= {"d"}
thanks in advance
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hi expert, finally i found result for my question, which is List str3= ListUtils.subtract(Arrays.asList(str1), Arrays.asList(str2));Apache– Apache2010-11-28 07:23:23 +00:00Commented Nov 28, 2010 at 7:23
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Didn't know you are using Apache Commons Library ( ref: ListUtils).Sujith Surendranathan– Sujith Surendranathan2010-11-28 07:41:17 +00:00Commented Nov 28, 2010 at 7:41
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2 Answers
ts1 will have "d" inside it after these operations.
String str1[] = {"a","b","aa","c"};
String str2[] = {"aa","a","b","c","d"};
TreeSet ts1 = new TreeSet(Arrays.asList(str2));
ts1.removeAll(Arrays.asList(str1));
Comments
Convert the arrays to a list and add them to a set which will automatically remove duplicates. Use the toArray() method of Set interface to get the elements as an Array.
String[] str1 = {"a","b","aa","c"};
String[] str2 = {"aa","a","b","c","d"};
Set set = new HashSet();
set.addAll(Arrays.asList(str1));//add first array to set, removes duplicates
set.addAll(Arrays.asList(str2));//add second array to set, removes duplicates
String[] str3 = (String[])set.toArray(new String[set.size()]);//convert back to array
