Keywords
There are certain words with a specific meaning in java which tell (help) the compiler what the program is supposed to do. These Keywords cannot be used as variable names, class names, or method names. Keywords in java are case sensitive, all characters being lower case.
Keywords are reserved words that are predefined in the language; see the table below (Taken from Sun Java Site). All the keywords are in lowercase.
abstract default if private this boolean do implements protected throw break double import public throws byte else instanceof return transient case extends int short try catch final interface static void char finally long strictfp volatile class float native super while const for new switch continue goto package synchronized |
/** This class is a Hello World Program used to introduce
the Java Language*/
public class HelloWorld {
public static void main(String[] args) {
System.out.println(“Hello World”); //Prints output to console
the Java Language*/
public class HelloWorld {
public static void main(String[] args) {
System.out.println(“Hello World”); //Prints output to console
}
}
}
Some Tricky Observations: The words virtual, ifdef, typedef, friend, struct and union are all words related to
the C programming language. const and goto are Java keywords. The word finalize is the name of a method
of the Object class and hence not a keyword. enum and label are not keywords.
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