Constants :- Constants in java are fixed values those are not changed during the Execution of program java supports several types of Constants  those are  

 

Identifiers :- The Identifiers are those which are used for giving a name to a variable  ,class and method ,packages ,interfaces etc There Are Some Rules against for using the Identifiers

 

An operator is a symbol which helps the user to command the computer to do a certain mathematical or logical manipulations. Operators are used in Java language program to operate on data and variables. Java has a rich set of operators which can be classified as

 


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