1
00:00:00,060 --> 00:00:03,130
We have understood how to run a Java program.

2
00:00:03,720 --> 00:00:07,260
Why don't we take a closer look at the program that we've written?

3
00:00:07,920 --> 00:00:11,760
The Hello World application consists of two primary components.

4
00:00:11,910 --> 00:00:18,800
First, the hell a world class definition and the main method, public class.

5
00:00:18,810 --> 00:00:22,530
Hello, world is the first line of our Java program.

6
00:00:23,400 --> 00:00:30,570
Every Java application must have at least one class definition that consists of the class keyword,

7
00:00:30,570 --> 00:00:32,430
followed by the class name.

8
00:00:33,640 --> 00:00:39,340
And the code for each class appears between the opening and closing curly braces.

9
00:00:40,400 --> 00:00:46,610
Now we will discuss the subject of classes in further detail and some of the upcoming lectures, but

10
00:00:46,610 --> 00:00:53,270
right now it's just enough to know that every Java application begins with a class definition.

11
00:00:54,080 --> 00:00:59,610
Public static void main string args or arguments.

12
00:01:00,380 --> 00:01:02,450
So this is our next line in the program.

13
00:01:03,660 --> 00:01:10,290
In the Java programming language, every application must contain a main method whose signature is,

14
00:01:10,290 --> 00:01:11,340
well, just like that.

15
00:01:11,790 --> 00:01:17,220
Also will cover how to define a method in Java and the next upcoming lectures.

16
00:01:18,410 --> 00:01:23,430
And then finally, line system got out dot print lekan.

17
00:01:24,440 --> 00:01:32,930
Hello, world, so the print method prints the contents inside the double quote into the console and

18
00:01:33,170 --> 00:01:39,560
inserts a new line after, so it uses a system class from the core library of Java.

19
00:01:40,430 --> 00:01:44,990
Now, don't worry, if you don't get it at first, we're going to learn a whole lot more about classes

20
00:01:44,990 --> 00:01:47,480
and methods in the next lectures.