ukacgla_BinaryConverter
Class Checker

java.lang.Object
  |
  +--ukacgla_BinaryConverter.Checker

public class Checker

extends java.lang.Object

Checker class function is to check student input, and determine if correct or not

Constructor Summary

Checker(ConverterFrame f)

Method Summary

protected java.lang.String	calcAnswer() calcAnswer() calculates the the correct answer.
protected int	calcPower(int b, int n) Returns b to the power n (providing b is non negative integer).
protected boolean	verifyAnswer() verifyAnswer() is used to get the students input, and compare it to the String generated by calcAnswer().

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

Checker

public Checker(ConverterFrame f)

Method Detail

calcAnswer

protected java.lang.String calcAnswer()

calcAnswer() calculates the the correct answer. It works by : 1. Getting the number to be calculated from the ConverterFrameObject. 2. Creating a new StringBuffer. 3. Calculating the number using the smart power algorithmn used in the calcPower() method, and building the StringBuffer as the answer. The StringBuffer is then returned as a string for use in comparison.

calcPower

protected int calcPower(int b,
                        int n)

Returns b to the power n (providing b is non negative integer). This uses a smart power algorithmn to quickly calculate the maximum value for any number to the power of another number.

verifyAnswer

protected boolean verifyAnswer()

verifyAnswer() is used to get the students input, and compare it to the String generated by calcAnswer(). verifyAnswer() checks the specifed line (defined in the answerRow variable) in the studentAnswer table. The method begins checking at Column Index 1 to skip the labels in Column 0.