That’s the basic information about different requirements starts with number, character, word, etc. Line starts with character ( case-insensitive) Regex Pattern to Match the Start of the Lineīelow given is the table that explains what should be our regular expression pattern for different requirements such as line starts with a number, starts with character, etc.
Let’s understand this with the help of an example in the below section. Suppose there is a requirement to write the regex to match the start of the line and end of the line then how all the above-given information helps us.
Dollar($) matches the position that is right after the last character in the String. Caret(^) matches the position that is before the first character in the String. If our requirement is to match the start and end of the line with the help of Line anchors then we can find it like below: But they are used to match the position between, before, or after characters. The answer to this question is that Line anchors are not used to matching the character. Overview to Line Anchorsįirst, an important question that arises when we write the regular expression is what are Line anchors and what their usage? Let’ start the tutorial to write the regex to match the start and end of the line. Write Regular expression to match the username based on requirement. If you want to know some basics of Java regular expression, then below is the tutorial to understanding the basics of regular expression in Java. In this tutorial, we will learn one of the most common requirements of Java developers that is how we can match the start and end of String with the help of regex (regular expression) in Java.įor this, we will use the concept of anchors in the regular expression.
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