Mine

import java.io.*;

public class ClassScore {
  
  private String getUserInput(String prompt) throws IOException {
    
    String inputLine = null;
    System.out.print(prompt + " ");
 
    BufferedReader is = new BufferedReader(new InputStreamReader(System.in));
    inputLine = is.readLine();
    if (inputLine.length() == 0)
      return null;
    
    return inputLine.toLowerCase();
    
  } // method getUserInput()
  
  
  private int getUserInteger(String prompt) {
    
    int convertedValue = -1;
    
    String tempString = null;
    
    try {
      
      tempString = this.getUserInput(prompt);
      convertedValue = Integer.parseInt(tempString);
      
      // return convertedValue;
      
    } // try
    catch (IOException ex) {
      System.out.println("IOEXception: " + ex);
    } // catch
    catch (java.lang.NumberFormatException ex) {
      SimpleOutput.showError("Error converting string \"" + tempString + "\" to an integer.");
      convertedValue = this.getUserInteger(prompt);
    } // catch
    catch (Exception ex) {
      System.out.println("Exception: " + ex);
    } // catch
    
   return convertedValue;
    
  } // method getUserInteger
  
  public static void main(String[] args) {
    
    int labScores[] = new int[12];
    int labMaximums[] = {10, 15, 20, 20, 25, 25, 30, 35, 35, 30, 35, 35};
    
    int assignmentScores[] = new int[6];
    int assignmentMaximums[] = {50 ,60, 70, 80, 90, 100};
    
    int labsTotal = 0;
    int labsMaximum = 0;
    
    int assignmentsTotal = 0;
    int assignmentsMaximum = 0;
    
    int midtermScore;
    int midtermMaximum = 100;
    
    int finalScore;
    int finalMaximum = 100;
    
    double labsFraction, assignmentsFraction, midtermFraction, finalFraction, classFraction;
    
    // The Class type
    ClassScore score = new ClassScore();
    
    
    try
    {
      String first=score.getUserInput("Enter First String");
      System.out.println("This string has length: "+ first.length());
                         
      String second=score.getUserInput("Enter Second String");
      System.out.println("This string has length: "+ second.length());                   
    
      String third=first+ " " +second; 
      System.out.println(third);
     }  
        
        catch (IOException ex)
      {
        System.out.println("IOException: " +ex);
      }
      
    
    // Get the lab scores
   /* for (int index = 0; index < 12; index++) {
      
      // Get the lab score
      labScores[index] = score.getUserInteger("Enter the Score for lab " + (index+1) + " (out of " +
                                              labMaximums[index] + "): ");
      System.out.println("\tThe score for lab " + (index+1) + " is " + labScores[index]);
      
    } // for
    
    // Get the assignment scores
     for (int index = 0; index < 6; index++) {
      
      // Get the lab score
      assignmentScores[index] = score.getUserInteger("Enter the Score for assignment " + (index+1) + 
                                                     " (out of " + assignmentMaximums[index] + "): ");
      System.out.println("\tThe score for assignment " + (index+1) + " is " + assignmentScores[index]);
      
    } // for
    
     // Get the midterm
     midtermScore = score.getUserInteger("Enter the midterm score (out of " + midtermMaximum + "): ");
     System.out.println("\tThe midterm score is " + midtermScore);
      
    // Get the final
     finalScore = score.getUserInteger("Enter the final score (out of " + finalMaximum + "): ");
     System.out.println("\tThe final score is " + finalScore);
     
     // Calculate the labs fraction
     for (int index = 0; index < 12; index++) {
       labsTotal += labScores[index];
       labsMaximum += labMaximums[index];
     } // for
     
     labsFraction = labsTotal / (double) labsMaximum;
     
     // Calculate the assignments fraction
     for (int index = 0; index < 6; index++) {
       assignmentsTotal += assignmentScores[index];
       assignmentsMaximum += assignmentMaximums[index];
     } // for
     
     assignmentsFraction = assignmentsTotal / (double) assignmentsMaximum;     
     
     // Calculate the midterm fraction
     midtermFraction = midtermScore / (double) midtermMaximum;
     
     // Calculate the final fraction
     finalFraction = finalScore / (double) finalMaximum;
     
     // Calculate the overall class fraction
     classFraction = labsFraction * 0.24 + assignmentsFraction * 0.16 + midtermFraction * 0.2 + finalFraction * 0.4;
     System.out.println("The class fraction is " + classFraction + ".");
     
     System.out.print("The class grade is ");
     if (classFraction >= 0.9)
       System.out.println("A.");
     else if (classFraction >= 0.8)
       System.out.println("B.");
     else if (classFraction >= 0.7)
       System.out.println("C.");
     else if (classFraction >= 0.6)
       System.out.println("D.");
     else 
       System.out.println("E."); */
    
  } // method main()
  
} // class ClassScore