Summary
Java contains 67 reserved keywords, which are predefined words that act as a key to a code and cannot be used as names for variables, methods, classes, or any other identifier.
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These keywords are used to indicate that a class or method will be implemented later, in a subclass, and that a variable holds a constant value or that a method will not be overridden.
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The list of Java keywords includes abstract, boolean, break, byte, case, catch, char, class, continue, default, do, double, else, enum, extends, final, finally, float, for, if, implements, import, instanceof, new, null, package, private, protected, and more.
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According to
