package class5_3_Libraries;

import java.text.DecimalFormat;
import java.util.Random;

public class Example {
    public static void main(String[] args) {
        // toString
        int x = 5;
        System.out.println("x is: "+x); // A same as B
        String str = "x is: "+x;
//        x.toString(); not allowed for primitives
        System.out.println("x is: "+Integer.toString(x)); // B same as A
        String str2 = "x is: "+Integer.toString(x);
        System.out.println("x is: "+Long.toString((long)x));
        String str3 = Integer.toString(x);
        String str4 = ""+x;

        // Case changes
        char letter = 'A';
        letter = Character.toLowerCase(letter);
        String word = "Class";
        word = word.toLowerCase();

        String word2 = "Joe";
        if(word2.isEmpty()) {
            System.out.println("Empty string!");
        } else {
            System.out.println(word2);
        }

        int index = word2.indexOf('e');
        System.out.println("Index of e: "+index);

        //Random
        Random generator = new Random();
        int randomInt = generator.nextInt(2)+1;

        DecimalFormat formatter = new DecimalFormat("#.#");
        System.out.println("Pi is: " + formatter.format(Math.PI));
        System.out.println("sqrt(2): " + formatter.format(Math.sqrt(2.0)));

        ///////////------------- OOP -----------------///////
        int count = 4;
        long millis = 3000000;
        String str7 = "Joe";
        String str8 = str7.toLowerCase();
        str7.toUpperCase();
        str7.charAt(0);
    }
}