In the Java programming language, a keyword is one of 50 reserved words which have a predefined meaning in the language; because of this, programmers cannot use keywords as names for variables, methods, classes, or as any other identifier.

In programming, a keyword is a word that is reserved by a program because the word has a special meaning. Keywords can be commands or parameters. Every programming language has a set of keywords that cannot be used as variable names. Keywords are sometimes called reserved names.

Java sets aside words as keywords - these words are reserved by the language itself and therefore are not available as names for variables or methods.

keyword: Java reserves some words. They cannot be used as variable, method or class names.

Java's keywords are reserved and cannot be used as names in your Java programs.

Java keywords are standard English words that have a special meaning in the Java programming language. Keywords include class, interface, abstract, public, static and final, which are used to declare the type and nature of Java compilation units. The statements used to define variables and method bodies include keywords new, return, if, while and throws. These words are interpreted by the Java compiler and used to produce byte code that can be run as a program.