Please HELP ASAP! I/O Command Line, How do you write them? System.in?

Question

I'm trying to create a program where the user can enter a year and gets the date of Easter on that year he/she entered. So far i've implemented the Easter class which contains the methods for getting the day and month of Easter, but I'm trying to write the main class which is kind of tricky for me. The main class is supposed to be the one asking the user for the year. Except I don't even know what you have to write. I did a bit of research and eventually found something like this: " InputStreamReader cin = new InputStreamReader(System.in)" I realize that that is a constructor and that cin is actually a variable supposed to hold whatever the user inputs. Except I just want to make sure if that's kind of the guidelines on how to make it so that the user can enter something back. Also, I want the user to enter a year- so in other words an int type. Here's why:(The Implemented Class for Easter)
public void Year()
//Method body
public int getEasterSundayMonth(int y)
//Method Body
public int getEasterSundayDay(int y)
//Method Body
Yea I want to make it so that the user's input is "int y" that way I can perform my methods in order to give them back the day and month Easter is on. So my 2 questions are on how to write the code so I can get a user's input, and on how to substitute the user's input into the variable "y" I just started learning Java about 3 weeks ago as a Sophmore in high school, so it's a bit difficult for me. Thanks in advance.

Answer 1

You should really work on expressing yourself more succinctly.
shadowpal2 wrote:
I did a bit of research and eventually found something like this: " InputStreamReader cin = new InputStreamReader(System.in)" I realize that that is a constructor and that cin is actually a variable supposed to hold whatever the user inputs.You misunderstood. System.in is used to read standard input to the Java process. If you don't know what "standard input" is: basically it's stuff that you could type at the console when you're running the program, but it could be file content depending on how you invoke the program.
InputStreamReader is a class that takes that stream of input bytes and turns it into a stream of characters. It doesn't really hold anything.
Except I just want to make sure if that's kind of the guidelines on how to make it so that the user can enter something back.It's one way of many of getting user input. Actually it's only part of one common idiom for getting user input.
Also, I want the user to enter a year- so in other words an int type. Just use a java.util.Scanner.
Yea I want to make it so that the user's input is "int y" The user's input is always going to be characters. Scanner has methods to automatically turn input into other types. If you use something else (like the common idiom involving InputStreamReader) you'd need to convert the Strings you read into ints by hand, which isn't hard but why do it if Scanner does it for you?
Read the docs for java.util.Scanner.