Java keywords are set of predefined words provided by java vendor which is also called reserved words. These keywords can’t be used as object names,variable names, method names or class names.
Now, let us go through a java program using java keywords.
Example:
//Java program using keywords
class Employee{
public static void main(String args[]){
//using final and int keyword
int grade=2;
//using if and else keywords
if(grade>2){
System.out.println(“Salary of the employee is less than $50k”);
}
else{
System.out.println(“Salary of the employee is more than $50k”);
}
}
}
Java Keywords List
Till Java 21,there are 53 keywords defined in java.
In the list of keywords, 2 keywords are unimplemented or unused keyword which are const & goto.
In Java true,false and null are reserved literals. These 3 literals can’t be used as identifiers in java program.
In Java, keywords are case sensitive and writing Java keywords in upper case (like VOID instead of void) will throw an error.