Intro to Programming Review

import java.io.File;
import java.io.FileNotFoundException;
import java.util.*;
public class main {

	public static void main(String[] args) {		
		// Printing out to console
		System.out.print("Hey!"); // Print on the same line
		System.out.println("Hi!"); // Print on the next line
		
		// Variables
		Scanner scannnnnner = new Scanner(System.in); // Creating objects
		int age = 4; // built-in (int, double, String, Boolean)
		String myName = "Bob";
		String hisName = "stupid";
		int hisAge = 678;
		boolean amIHungry = true;
		
		// Incremental shortcuts
		int i = 0;
		i++; // add one to i
		i--; // Subtract by one
		i+=10; // add whatever number (works with other operands (*, / , -)
		System.out.println(i);
		
		// If/else (logic)
		if (age == hisAge) { // If primitives are equal
			System.out.println("They're equal!");
		} else if (age > (2 * hisAge)) { // greater than (also > < >= <=)
			System.out.println("I'm older! I think...");
		} else if (myName.equals(hisName)){ // comparing Strings
			System.out.println("He is me and I am him.");
		} else if (amIHungry){ // boolean
			System.out.println("Get me a sammich.");
		} else if (amIHungry || hisAge > age) { // or
			System.out.println("I have conflicting emotions.");
		} else if(amIHungry && hisAge > age) { // and
			System.out.println("I have conflicting emotions.");
		} else if (amIHungry ^ hisAge > age) { // exclusive or (only one can be true) aka XOR
			System.out.println("I have conflicting emotions.");
		} else {
			System.out.println("i r ded.");
		} 
		
		// Scanner (reading in from console/textfile)
		// Make sure to input java.util.Scanner
		Scanner scan = new Scanner(System.in); // Create Scanner instance
		
		System.out.println("Greeting adventurer! What is your name sir/madam?");
		String userName = scan.nextLine(); // Read in next line
		System.out.println("Hello " + userName + "!"); // Do something with captured input (String)
		
		System.out.println("How old are you?");
		int userAge = scan.nextInt();
		System.out.println("I see you are " + Integer.toString(userAge) + " years old!"); // Convert captured int to string so we can concatenate it...
		
		// text file input
		// Make sure to import java.io.File and java.io.FileNotFoundException
		File textDocument = new File("textdoc.txt");
		try {
			Scanner scanText = new Scanner(textDocument);
			
			// Print out every line of file
			while(scan.hasNextLine()) {
				System.out.println(scan.nextLine());
			}
			
		} catch(FileNotFoundException e) { // import java.io.FileNotFoundException
			System.out.println("Cannot find text doc.");
		}
		
		// For/while loops
		// For		
		for(int j = 0; j < 100; j++){ // Loop 100 times
			System.out.println(j); // Print out j/do something with j
		}
		
		// While
		int j = 0;
		while(j < 100) { // Loop until condition is false
			System.out.println(j); // Print j
			j++; // Increment j by one
		}
		
		// do/while (run code at least once)
		do {
			
		} while (false);
		
		// Arrays/ArrayList
		// Arrays (static size)
		// Declare with: Type[] name = new Type[size];
		String[] stringArray = new String[5]; // String array with 5 slots
		String[] stringArrayContainingStrings = {"hey", "there", "compadre"}; // Creating array with variables
		
		// Array stuff
		stringArray[0] = "newString"; // Set to new value at specified index
		
		// ArrayLists
		// Declare with: ArrayList<Type> name = new ArrayList<Type>();
		List<String> stringArrayList = new ArrayList<String>(); // Create empty ArrayList
		
		// ArrayList methods
		stringArrayList.add("myNameHere"); // Add object to ArrayList
		stringArrayList.get(0); // Get the object in the first slot
		stringArrayList.set(0, "newString"); // Set object at index to new value
		stringArrayList.remove(0); // Remove object at specified index
		
		// Compare arrays
		// if(arrayOne.equals(arrayTwo))
		
		// Iterating through arrays
		for (int k = 0;k < stringArrayList.size(); k++) { // Get size of Array with array.length
			System.out.println(stringArrayList.get(k)); // Print out every value of stringArrayList
		
			// Set two ArrayLists equal to each other
			// stringArrayList.set(k, otherArrayList.get(k));
			
			// For arrays...
			// ArrayOne[k] = ArrayTwo[k];
		}
		
	}
	
	// Methods and Objects
	// Methods
	// Declare: (public/private) (static/[don't put static]) (returnType/void[for not returning anything]) methodName(arguments[ObjectType name]) {
	// Calling: methodName(arguments);
	
	// Method overloading
	// You can have two methods with the same name, as long as they have different arguments
	// ex. foo(a) and foo(a,b)
	
	// Objects
	// Declare constructor: public className(arguments) { <code> } // Notice className is returnType and name (and this is always static)
	
	// Comments
	// <-- comment out one line
	/*  comment
	 	out
	 	multiple
	 	lines
	*/ 
	
	/* Where to go from here?
	 * Math class (from java.util.Math)
	 * Do your own projects! (abstracts, interfaces, libraries/packages, GUIs)
	 * Reading in from different files (JSON, CSV, etc.)
	 * 
	 *  Resources:
	 *  http://www.projecteuler.com
	 *  http://www.reddit.com/r/dailyprogrammer
	 *  https://github.com
	 *  Java Documentation (https://docs.oracle.com/javase/7/docs/api/)
	 *  https://stackoverflow.com (Q/A programming website)
	 *  
	 *  Pick up more languages (ex. python, javascript, c++, ruby)
	 */
}