In this tutorial you will learn about the Java Compile and Run Program and its application with practical example.
Creating, Compiling, and Running a Java Program
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Editing Java Program
Step 1:- Create a file called “HelloWorld.java” using a text editor program of your choice. The .java file extension is used to specify the java language file.
Step 2:- Let’s open the “HelloWorld.java” file that we created, put the following line of code in it, and save it.
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// Your First Program class HelloWorld { public static void main(String[] args) { System.out.println("Hello, World!"); } } |
The println() is a function that tells java to display or output the content inside the parentheses.
Compiling Java Program
Step 3:- Now, go to the terminal and switch to the project directory and run the following command to compile the java program we created.
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javac HelloWorld.java |
Running Java Program
Step 4:- After compilation the .java file gets translated into the .class file(byte code). Now we can run the program. To run the program, type the following command and press enter –
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java HelloWorld |
Once the java program is executed it will print “Hello, World!”.
Output:-
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Hello, World! |
