Exercise 1:

The target of this exercise is to write, compile and execute a java program. We will create a program that writes the message Welcome to the Laboratory in the console.

First, use your favourite editor to create a file called Welcome.java, and copy these lines as the content of the file:

public class Welcome {
    static public void main(String argv[]) {
	System.out.println("Welcome to the Laboratory");

Now, you have your first Java program. Execute the following command in order to compile the program:
javac Welcome.java
If there are no errors, a file called Welcome.class has been created. This file can be executed in the Java Virtual Machine. Invoke the following command to execute it:
java Welcome
And as result of the program execution, you should see the following output in the console:
Welcome to the Laboratory
That is all.