java keywods & reserved

The following character sequences, formed from ASCII letters, are reserved for use as keywords and cannot be used as identifiers :

 

Keyword: one of        abstract    continue    for           new          switch        assert      default     if            package      synchronized        boolean     do          goto          private      this        break       double      implements    protected    throw        byte        else        import        public       throws        case        enum        instanceof    return       transient        catch       extends     int           short        try        char        final       interface     static       void         class       finally     long          strictfp     volatile        const       float       native        super        while                                

The keywords const and goto are reserved, even though they are not currently used. This may allow a Java compiler to produce better error messages if these C++ keywords incorrectly appear in programs.

While true and false might appear to be keywords, they are technically Boolean literals Similarly, while null might appear to be a keyword, it is technically the null literal.