![]() ![]() java/missing-position-check-before-substringv1.0. The example includes a call to the IndexOf(String) method if a substring is found in a string instance. Getting a substring outside the range of a string can cause an index-out-of-bounds exception. If you are interested in the position of the substring value in the current instance, you can call the IndexOf method to get the starting position of its first occurrence, or you can call the LastIndexOf method to get the starting position of its last occurrence. W3Schools offers free online tutorials, references and exercises in all the major languages of the web. ![]() ' Does 'This is a string.' contain 'this'? ' The example displays the following output: String^ s1 = "The quick brown fox jumps over the lazy dog" Ĭonsole::WriteLine( "Is the string, s2, in the string, s1?: ", comp, s.Contains(sub1, comp)) There are several ways to check whether a string contains a substring in Java. Call contains() method on the string str1 and pass the other. If "fox" is found in the string, it also displays its starting position. Pre-ES6, the common way to check if a string contains a substring was to use indexOf, which is a string method that return -1 if the string does not contain. To check if a String str1 contains another string str2 in Java, use ntains() method. The following example determines whether the string "fox" is a substring of a familiar quotation. ![]()
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