Extract the difference between two strings in Java
compare, java, string
Solution
google-diff-match-patch
The Diff Match and Patch libraries offer robust algorithms to perform the operations required for synchronizing plain text.
Diff:
Compare two blocks of plain text and efficiently return a list of differences.
Match:
Given a search string, find its best fuzzy match in a block of plain text. Weighted for both accuracy and location.
Patch:
Apply a list of patches onto plain text. Use best-effort to apply patch even when the underlying text doesn't match.
Currently available in Java, JavaScript, Dart, C++, C#, Objective C, Lua and Python. Regardless of language, each library features the same API and the same functionality. All versions also have comprehensive test harnesses.
There is a Line or word diffs wiki page which describes how to do line-by-line diffs.
Problem
Hi I have two strings : ``` String hear = "Hi My name is Deepak" + "\n" + "How are you ?" + "\n" + "\n" + "How is everyone"; String dear = "Hi My name is Deepak" + "\n" + "How are you ?" + "\n" + "Hey there \n" + "How is everyone"; ``` I want to get what is not present in the hear string that is "Hey There \n". I found a method , but it fails for this case : ``` static String strDiffChop(String s1, String s2) { if (s1.length() > s2.length()) { return s1.substring(s2.length() - 1); } else if (s2.length() > s1.length()) { return s2.substring(s1.length() - 1); } else { return ""; } } ``` Can any one help ?