Java Identifiers

-

In programming languages, identifiers are used for identification purpose.

In Java an identifier can be a Class name, Method name, Variable name or a Label.

For Example,

public class Test
{
public static void main(String[] args)
{
int x = 10;
}
}

In the above Java code, we have 5 identifiers:
1. Test - Class name
2. main - Method name
3. String - Predefined Class name
4. args - Variable name
5. x - Variable name

Happy Learning !

Comments

Post a Comment

Popular posts from this blog

Explain public static void main in Java

-
Image
Whether the class contains main method or not and whether main method is declared according to requirement or not these things won’t be checked by compiler. At Run time JVM is responsible to check these things. If JVM unable to find main method then we will get run time exception saying “No SuchMethodError: main” class Test { } Javac Test.java Java Test Runtime Exception: “No SuchMethodError: main” At Run time JVM always searches for the main method with the following prototype. public static void main (String[] args) public : public keyword is an access modifier which represents visibility, it means it is visible to all. To call by JVM from anywhere. This makes the main method public that means that we can call the method from outside the class. static : static is a keyword, if we declare any method as static, it is known as static method. The core advantage of static method is that there is no need to create object to invoke the static method. The main me
Read more

Reserve or Key Words in Java

-
Image
Any programming language reserves some words to represent functionalities defined by that language. These words are called Reserved words. These words can't be used as names for Variables, Methods, Class or any other Identifier. Keywords for Data Types (8): 1. byte 2. short 3. int 4. long 5. float 6. double 7. boolean 8. char Keywords for Flow control (11): 1. if 2. else 3. switch 4. case 5. default 6. while 7. do 8. for 9. break 10. continue 11. return Keywords for Modifiers (11): 1. public 2. private 3. protected 4. static 5. final 6. abstract 7. synchronized 8. native 9. strictfp (came in 1.2 version) 10. transient 11. volatile Keywords for Exceptional Handling (6): 1. try 2. catch 3. finally 4. throw 5. throws 6. assert (came in 1.4 version) Keywords for Class Related (6): 1. class 2. interface 3. extends 4. implements 5. package 6. import Keywords for Object Related (4
Read more

What is Automation ?

-
Image
Automation can be defined as the technology by which a process or procedure is performed without human assistance . As per ISA , the dictionary defines automation as “the technique of making an apparatus, a process, or a system operate automatically.” We define automation as "the creation and application of technology to monitor and control the production and delivery of products and services.” For better reference watch the video below:- credits: Wiki, International Society of Automation (ISA), Youtube.
Read more