Course Content

Course Content


The String class in Java has a multitude of built-in methods for manipulating strings. We can execute actions on String objects using these methods, such as cutting, concatenating, converting, comparing, and replacing strings.

String classes provide a way for us to manipulate text data in various ways. They can be used for formatting, searching, parsing, filtering, and more.

String Methods:

  • String concatenation: Concatenate two or more strings into one string.
  • String substring: Retrieve a specified range of characters from the beginning of a string and return it as a new string.
  • String indexOf(): Find the first occurrence of a specified character or substring within another string and return its index position in the original string.
  • String replace(): Replace all occurrences of one character or substring with another character or substring within another string.

In Java, the string methods are used to create and manipulate strings. They are divided into two categories:

  • String manipulation methods
  • String creation methods

The string creation methods are further divided into two categories:

  • Concatenation
  • Appendage

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