Displaying the Number Guess Screen (numguess.jsp)
________________________________________________________
<%@ page import = "num.NumberGuessBean" %>
<jsp:useBean id="numguess" class="num.
NumberGuessBean" scope="session" />
<jsp:setProperty name="numguess" property="*" />
<html>
<head><title>Number Guess</title></head>
<body bgcolor="white">
<font size=4>
<% if (numguess.getSuccess() ) { %>
Congratulations! You got it.
And after just <%= numguess.getNumGuesses() %>
tries.<p>
<% numguess.reset(); %>
Care to <a href="numguess.jsp">try again</a>?
<% } else if (numguess.getNumGuesses() == 0) { %>
Welcome to the Number Guess game.<p>
I'm thinking of a number between 1 and 100.<p>
<form method=get>
What's your guess? <input type=text name=guess>
<input type=submit value="Submit">
</form>
<% } else { %>
Good guess, but nope. Try <b><%= numguess.
getHint() %></b>.
You have made <%= numguess.getNumGuesses() %>
guesses.
I'm thinking of a number between 1 and 100.<p>
<form method=get>
What's your guess? <input type=text name=guess>
<input type=submit value="Submit">
</form>
<% } %>
</font>
</body>
</html>
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Handling the Guess (NumberGuessBean.java)
package num;
import java.util.*;
public class NumberGuessBean
{
int answer;
boolean success;
String hint;
int numGuesses;
public NumberGuessBean()
{
reset();
}
public void setGuess(String guess)
{
numGuesses++;
int g;
try
{
g = Integer.parseInt(guess);
}
catch (NumberFormatException e)
{
g = -1;
}
if (g == answer)
{
success = true;
}
else if (g == -1)
{
hint = "a number next time";
}
else if (g < answer)
{
hint = "higher";
}
else if (g > answer)
{
hint = "lower";
}
}
public boolean getSuccess()
{
return success;
}
public String getHint()
{
return "" + hint;
}
public int getNumGuesses()
{
return numGuesses;
}
public void reset()
{
answer = Math.abs(new Random().nextInt() % 100)
+ 1;
success = false;
numGuesses = 0;
}
}
