Quiz4Topics

import java.util.Random; // imported for use of Random class

//QUIZ 4 ULTIMATE REVIEW

public class Quiz_4_Review {

	/* Methods with Parameters (Line 23)
	 * 
	 * String Methods (Line 71)
	 * 
	 * char-int-String (Line 81)
	 * 
	 * Random (Line 95)
	 * 
	 * while Loops (Line 122)
	 * 
	 * do-while Loops (Line 112)
	 * 
	 * Boolean type (Line 135)
	 * 
	 */
	
	//METHODS WITH PARAMETERS
	
	public static void what(int oh) {
		oh = oh + 1;
		System.out.println(oh);
	}
	
	public static int what2(int oh) {
		return oh=oh+1;
	}
	
	public static boolean doesIt(String str) {
		return str.contains("it");
	}
	
	public static String cool(String str) {
		if (str.contains("apple")) {
			return "yes";
		}
		else {
			return "no";
		}
	}
	public static void main(String[] args) {
		System.out.println("Parameters and returns: ");
		what(5);
		System.out.println(what2(5));
		System.out.println(doesIt("it can"));
		System.out.println(cool("apple"));
		line();
		System.out.println("String methods: ");
		stringyBoy("Bobi");
		line();
		System.out.println("char-int-String: ");
		charPrac('h');
		line();
		System.out.println("Random: ");
		ranran();
		line();
		System.out.println("While loops: ");
		loopywoo();
		line();
		loopynoo();
		line();
		System.out.println("Boolean: ");
		boolboy();
}
	
	//STRING METHODS
	
	public static void stringyBoy(String str) {
		System.out.println(str+" has "+str.length()+" letters.");
		System.out.println("The index of \"b\" is "+str.indexOf("b"));
		System.out.println(str.substring(1,2));
		System.out.println(str.substring(3));
		System.out.println(str+" capitalized is "+ str.toUpperCase());
	}
	
	//char-int-String
	
	//Mixing char and int causes automatic conversion to int.
	//To convert an int into the equivalent char, type cast it.
	//Specify chars with 'one' quotation instead of "two"
	
	public static void charPrac(char a) {
		System.out.println('a'-a);
		System.out.println((char)('a'+a));
	}
	
	//String is an object; it contains methods
	//char is primitive type, not object
	
	//RANDOM
	
	public static void ranran() {
		Random rand = new Random();
		int randomNumber = rand.nextInt(10); // min 0, max 9 
		int randomNumber2 = rand.nextInt(6)+1; //min 1, max 6
		int randomNumber3 = rand.nextInt(7)+7; //min 7, max 13
		int randomNumber4 = 2*rand.nextInt(7)+7; // 
		System.out.println(randomNumber4);
		System.out.println(randomNumber3);
		System.out.println(randomNumber2);
		System.out.println(randomNumber);
		//If rand.nextInt(6)+1; then 1 is the min, and 6+1=7, so the max is 7-1 or 6.
		//If rand.nextInt(7)+7, 7 is min, 7+7=14, so max is 14-1 or 13.
		
	}
	
	public static void loopywoo() {
		
		int i=10;
		do {
			System.out.println(i);
			i--;
			
		}while (i>=1);
	}
	
	public static void loopynoo() {
		
		int i=10;
		while (i>=1) {
			System.out.println(i);
			i--;
		}
	}
	
	public static void line() {
		System.out.println("---------------------------");
	}
	
	public static void boolboy() {
		
		boolean flag1 = false; //some false condition
		boolean flag2 =true; //some true condition
		
		if (flag1 || flag1 && flag2) {
			System.out.print("a");
		}
		else {
			System.out.print("b");
		}
	}
	
	
}