Note that String.matches evaluates the entire string, requiring the ".*" prefix and suffix to search for a substring. Here's how you can use it: String str = "Welcome to Java" This method checks whether the input string matches a specified regular expression. String.matchesĪnother feature from the standard Java library, shines when complex pattern matching is necessary. While String.indexOf is simple and efficient, its inability to support regular expressions or provide extra information such as multiple occurrences or exact positions constrains its utility. In this example, String.indexOf identifies that "Java" indeed exists within our string. Let's illustrate with an example: String str = "Welcome to Java" This method operates by returning the index of the first occurrence of a specified substring within a string, or -1 if the substring is not found. String.indexOfĪ core member of the standard Java library. This article unveils four noteworthy alternatives to ntains: String.indexOf, String.matches, Pattern and Matcher classes, and ntains from Apache Commons Lang, complete with illustrative examples. To enhance our problem-solving capabilities and expand our toolset, let's explore alternative techniques. However, it may not always cater to diverse developer needs. Among these, ntains often serves as the go-to for simple string-searching tasks. Java, one of the most versatile and extensively employed programming languages, boasts a rich array of string manipulation methods.
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