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  String Comparison, Concatenation and Substring There's a lot to say about Strings, from the ways you can initialize them to the String Literal Pool, however in this article we'll focus on common operations, rather than the class itself. Introduction Simply put, a String is used to store text, i.e. a sequence of characters. Java's most used class is the String class, without a doubt, and with such high usage, it's mandatory for Java developers to be thoroughly acquainted with the class and its common operations. Java String comparison We can compare string in java on the basis of content and reference. It is used in authentication (by equals() method),  sorting (by compareTo() method),  reference matching (by == operator) etc There are three ways to compare string in java: By equals() method By = = operator By compareTo() method 1.Java String equals() The java string equals() method compares the two given strings based on the content of the string. If any character is ...