Answers for Practice Midterm B

1a.
   public static void main(String[] args)
   {
       int x;
       x = Integer.parseInt(
            JOptionPane.showInputDialog("Enter an int."));
       if(x % 10 == 7)
           System.out.println("The number ends in 7.");
       else
           System.out.println("The number does not end in 7.");
   }


1b.
   public static void main(String[] args)
   {
       String x;
       x = JOptionPane.showInputDialog("Enter a string."));
       if(x.charAt(0) == 'T' || x.charAt(0) == 't')
           System.out.println("The string begins in T or t.");
       else
           System.out.println("The string does not begin in T or t.");
   }


2a. 
   public static void main(String[] args)
   {
       int x, count = 0;
       x = Integer.parseInt(
            JOptionPane.showInputDialog("Enter an int."));
       while(x > 0)
       {
           if(x % 10 == 7)
              count++;
           x = Integer.parseInt(
                JOptionPane.showInputDialog("Enter an int."));
       }    
       System.out.println("The count of numbers ending" +
           " in 7 is " + count);
   }

2b. 
   public static void main(String[] args)
   {
       String x; 
       boolean isLength4 = false;
       x = JOptionPane.showInputDialog("Enter a string."));
       while(x > 0)
       {
           if(x.length() == 4)
              isLength4 = true;
           x = JOptionPane.showInputDialog("Enter a string."));
       }    
       if (isLength4)
           System.out.println("There is a string of length 4");
   }

2c.
   public static void main(String[] args)
   {
       int hoursWorked; 
       double hourlyWage, totalWages = 0;
       hoursWorked = Integer.parseInt(
            JOptionPane.showInputDialog("Enter hourly wage."));
       while(hoursWorked > 0)
       {
           hourlyWage = Double.parseDouble(
               JOptionPane.showInputDialog("Enter a hours worked."));
           totalWages += hoursWorked * hourlyWage;
           hoursWorked = Integer.parseInt(
               JOptionPane.showInputDialog("Enter hourly wage."));
       }
       System.out.println("Total wages = " + totalWages);
   }

2d.
   public static void main(String[] args)
   {
       String name, gender, maxName;
       double salary, maxSalary;
       name = JOptionPane.showInputDialog("Enter the name."));
       while(!name.equals("endoflist")
       {
           gender = JOptionPane.showInputDialog("Enter the gender."));
           salary = Double.parseDouble(
               JOptionPane.showInputDialog("Enter salary."));
           if (salary > maxSalary && gender.equals("F"))
           {
               maxSalary = salary;
               maxName = name;
           }
           name = JOptionPane.showInputDialog("Enter the name."));
       }
       System.out.println("The woman with the " +
           "largest salary is " + maxName);
   }