Learn Java

_{Author: Ajay Gupt
© Ajay Kumar Gupt, 2021}

Welcome!

Here, you will get to know basics of Java Programming.

Contents:

• Java through cmd

1. Structure of a java program
2. Classes
3. Input ans Output Classes
4. Operators
5. conrol Statements
6. Arrays
7. Strings
8. Packages and interfaces
9. Inheritance
10. Exceptions
11. Threads

Run Java from Command Line

To run a Java file in windows cmd:

1. Save the file with 'FileName.java'
2. In cmd Navigate the prompt in the directory where the 'FileName.java' file exists.
3. Type javac FileName.java A FileName.class file will be created in the same directory.
4. Type java FileName

To print on screen use function:

printf()

To reads the keyboard entries in string form:

readLine()

To converts String to int:

Integer.parseInt()