I created a small snippet to illustrate my problem. Using String.substring() The easiest way is to use the built-in substring() method of the String class. How to I overcome it by skipping those entry without dot(.). It is used to return the substring that comes after the last occurrence of the given separator. I will get an error Exception in thread "main" : String index out of range: -1 The substringAfterLast () method is a static method of StringUtils. before: 'I need this words removed taken please'. I want to input the data into a Hashmap and do some datamapping. Is there a command in java to remove the rest of the string after or before a certain word Example: Remove substring before the word 'taken'. In all examples given above, we can use an empty replacement and it’ll effectively remove a target from a master. Longest Substring of given characters by replacing at most K characters for Q queries. It’s because the regex supplied as regexTarget will only match the last occurrence of Baeldung. The value of processed2 will be: Welcome to Baeldung, Hello World Java String processed2 = master2.replaceAll(regexTarget, replacement) Returns the index of the first (last) occurrence of the specified character, searching forward (backward) from the specified index. As their name implies, replaceAll() will replace every matched occurrence, while the replaceFirst() will replace the first matched occurrence: String master2 = "Welcome to Baeldung, Hello World Baeldung" output path.substring(0, path.lastIndexOf('/', 1)) given how the doc says. If a regular expression is required in choosing the target, then the replaceAll() or replaceFirst() should be the method of choice. This matches at a certain position in the string, namely at a position right after the text sentence without making that text itself part of the match. Java substring () utility is a very powerful library if you want to perform multiple special operations on String. To get what youre trying to do with lastSubstring(), you can efficiently use substring(). You cant efficiently find the last index with a given value using indexOf(), so lastIndexOf() is necessary. For that, first you need to get the index of the separator and then using the substring() method get, the substring after the separator. The above snippet will yield this output: Hello World Java! Im not aware of that sort of counterpart to substring(), but its not really necessary. If the separator is null or is not found in the input string, an empty string is returned. The separator is not returned along with the substring. String processed = master.replace(target, replacement) ĪssertTrue(ntains(replacement)) The substringAfterLast () method is a static method of StringUtils.
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