Case-insensitive startWith () method

Question

I want to use the startsWith() String method, but ignoring this case.

Suppose I have a String "Session" and I use startsWith on "sEsSi", then it should return true .

Answer 1

Use toUpperCase() or toLowerCase() to standardize your string before testing it.

Answer 2

One option is to convert both of them to lowercase or uppercase:

 "Session".toLowerCase().startsWith("sEsSi".toLowerCase()); 

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Another option is to use the String#regionMatches() method, which takes a boolean argument indicating whether to match case-sensitive or not. You can use it as follows:

 String haystack = "Session"; String needle = "sEsSi"; System.out.println(haystack.regionMatches(true, 0, needle, 0, 5)); // true 

It checks to see if the needle region from index 0 to length 5 is present in the haystack , starting from index 0 to length 5 or not. The first argument is true , meaning that it will make case insensitive.

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And if you are only a big fan of Regex , you can do something like this:

 System.out.println(haystack.matches("(?i)" + Pattern.quote(needle) + ".*")); 

(?i) built-in flag is used to match cases of ignoring.

Answer 3

 myString.toLowerCase().startsWith(starting.toLowerCase()); 

Answer 4

try it,

 String session = "Session"; if(session.toLowerCase().startsWith("sEsSi".toLowerCase())) 

Answer 5

You can always do

 "Session".toLowerCase().startsWith("sEsSi".toLowerCase()); 

Answer 6

You can use someString.toUpperCase().startsWith(someOtherString.toUpperCase())

Answer 7

starts with and toLowerCase together

like this

 "Session".toLowerCase().startsWith("sEsSi".toLowerCase()); 

Answer 8

You can do something like this: -

 str.toLowerCase().startsWith(searchStr.toLowerCase());