import java.util.Scanner;
   public class decisions {
      public static void main(String[] args) {
      
         boolean cold = false;
         int temp;
         char rain;
         Scanner kb = new Scanner(System.in);
         int age;
      
         System.out.print("enter temp: ");
         temp = kb.nextInt();
         if (temp < 40)
            cold = true;
         System.out.print("raining? (y/n) ");
         rain = kb.next().charAt(0);
      	
         if (temp < 60 && rain == 'y')
            cold = true;
      		
         if (!cold)
            System.out.println("it's getting hot in here");
         else
            System.out.println("it's cold");
      
         cold = false;
         System.out.print("enter your age: ");
         age = kb.nextInt();
      
         if (cold && 23 < 500%10 || age >= 15)
         {
            System.out.println("true");
            if (age >= 18)
            {
               System.out.println("vote");
               if (age >= 21)
               {
                  System.out.println("let's party");
               }
               if (age >= 16)
               {
                  System.out.println("drive");
                  System.out.println("be careful");
               }
               else
               {
                  System.out.println("baby");
                  System.out.println("whatever");
               }
            }
            else 
               System.out.println("broken");
         }
      
      // COMPARING STRINGS
      
         String s1 = "Wednesday";
         String s2 = "wednesday";
         if (s1 == s2)
            System.out.println("s1 s2 same");
      
         String s3 = "Wednesday";
         if (s1 == s3)  // true if refer to same exact place in memory
            System.out.println("s1 s3 same object in memory");  // maybe
      
         s3 = new String("Wednesday");
         if (s1 == s3)  // true if refer to same exact place in memory
            System.out.println("s1 s3 same object");  // not same object
      	
         String s4 = "Wed";
         s4 = s4 + "nesday";
         if (s1 != s4)  // true if refer to same exact place in memory
            System.out.println("s1 s4 not same object");  // not same object
      
         if (s1.equals(s2))  // true if contain same exact characters
            System.out.println("s1 equals s2");
         if (s1.equals(s3))
            System.out.println("s1 equals s3");
         if (s1.equals(s4))
            System.out.println("s1 equals s4");
      
      
         if (s1.equalsIgnoreCase(s2))  // ignoring capitalization version
            System.out.println("s1 and s2 same ignoring capitalization");
      
      /*
      if (! s2.equals(s2))          // how to say not equals
      */
      
         if (s1.compareTo(s2) < 0)
            System.out.println("s1 less than s2");
      
         if (s1.compareToIgnoreCase(s2) > 0)
            System.out.println("s1 comes after s2 ignoring capitalization");
      
         if (s1.compareTo(s2) == 0)
            System.out.println("s1 same as s2");
      
         s1 = "apple";
         s2 = "Pear";
         if (s2.compareToIgnoreCase(s1) > 0)
            System.out.println(s2 + " after " + s1 + ", ignoring case");
      
      // want to know #days in a month
      
         System.out.print("enter month by number (1-12): ");
         int month = kb.nextInt();
         int days = 0;
      
         switch (month) {
            case 2: days = 28; 
               break;
            case 9: case 4: case 6: case 11: days = 30; 
               break;
            case 1: case 3: case 5: case 7: case 8: case 10: case 12: days = 31; 
               break;
            default: System.out.println("invalid month");
         }
         System.out.println("#days " + days);
      
      // this does the same thing, but uses a switch without breaks!
         days = 0;
         switch (month) {
            case 1: case 3: case 5: case 7: case 8: case 10: case 12: days++;
            case 9: case 4: case 6: case 11: days += 2;
            case 2: days += 28;
         }
         System.out.println("#days " + days);
      
        // this does the same thing, but uses a switch without breaks!
         days = 28;
         switch (month) {
            case 1: case 3: case 5: case 7: case 8: case 10: case 12: days++;
            case 9: case 4: case 6: case 11: days += 2;
            default: ;  // do nothing
         }
         System.out.println("#days " + days);
      
      }
   }