Java String Equality In Java, string equality check is performed using the equals() method, which compares the content of two strings for exact matches. For example, str1.equals(str2) returns true if the strings are identical. To ignore case differences, use equalsIgnoreCase(). Avoid using == for strings, as it checks reference equality, not content. This operation is fundamental in string manipulation and is widely used in Java applications for comparisons and validations.