How to Compile and Run Java Programs


When JDK is installed on your machine, it provides two commands for you to compile and run Java programs.

javac class_name.java” – Compiles a Java program stored a file named with the program class name.

java -cp . class_name” – Runs a compiled Java program. “-cp .” specifies the current directory as the class path.

Let’s try these commands with a very simple Java program. Use NotePad to enter the following Java program into a file called Hello.java:


[java]
class Hello {

public static void main(String[] a) {

System.out.println("Hello world!");

}

}
[/java]


Then compile this program in a command window with the “javac” command:
C:\>\progra~1\java\jdk1.6.0_02\bin\javac Hello.java

To execute the program, use the java command:
C:\>\progra~1\java\jdk1.6.0_02\bin\java Hello


Hello world!

Congratulations, you have successfully entered, compiled and executed your first Java program.
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Akash Padhiyar

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2 Comments

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