A few basic facts about Java.
Iβm taking a Java class right now and sometimes just looking at code is really great to get the learning started.
Meant for beginners, Iβve come up with a few basic code samples to showcase as a convenient way of getting to know Java. You and me are going to explore the bare surface of the digital hieroglyphics of Java and its all wonderful ciphers! π
Letβs look at comments first.
class CommentOutCode { public static void main(String args[]) { System.out.println("Haha!"); System.out.println("That was awesome!"); // No doubt! // System.out.println("Harharhar"); /* System.out.println("I had tears rolling down my eyes..for real tho"); System.out.println("Zoo-wee-MAMA!"); */ }
single line comments
// stuff
multi-line comments
/* more stuff */
Okay, so that wasΒ super easyβ¦
Go ahead, press the button! π Virtuallyβ¦
So moving onβ¦to the main method!
class MainMethodShizz { public static void main (String[] args) { System.out.println("Gotta use it!"); } }
This is the main method that youβre going to use every time you run a Java program, unless youβre making just a class file, in which case you will not need the wholeΒ public static void main (String[] args)
, but you will still need [class
] with the class name next to it.
Brackets or the curly braces (what have you) that look like thisΒ { }
Β are required at the beginning and end of each method youβve used to indicate when youβve finished the programming statements for that particular method.
Finally, for eachΒ System.out.println("Text");
Β that you have there always needs to be aΒ ;
Β at the end. Always! So get used to it!
If you decideΒ NOTΒ to put the stupidΒ ;
Β at the end of your output statements, you WILL get anΒ ERROR.
Also, in case you were wondering, with most IDEs or Integrated Development Environments, there is syntax highlighting which makes it easier to understand whatβs going on by adding color to the types of different texts.
For example, with the Strings involved in the program, they are the color [red]. With the comments involved in the program, they are the color [gray]. Different methods are highlighted in [blue].
So thatβs pretty much it for the super duper basics of any Java program.
Remember, you gotta have your:\
- main methodΒ
public static void main (String[] args)
\ - curly bracesΒ
{}
\ - semi-colonsΒ
;
\ - comments to explain what the heck youβre doing in the program such as [
//single-line stuff
] or [/*multi-line stuff*/
]