Here's the code:
import javax.swing.*;
// This is my custom exception
class InvalidHexException extends RuntimeException {
}
class HexToDec {
// This method throws a custom exception called InvalidException
static int [] convertToInt(String hex) throws InvalidHexException {
char currChar;
int intEq[] = new int[hex.length()];
for (int i = 0; i < hex.length(); i++) {
currChar = hex.charAt(i);
if (currChar >= '0' && currChar <='9') {
intEq[i] = currChar - '0';
} else if (currChar >= 'a' && currChar <='f') {
intEq[i] = currChar - 'a' + 10;
} else if (currChar >= 'A' && currChar <='F' ) {
intEq[i] = currChar - 'A' + 10;
} else {
throw new InvalidHexException();
}
}
return intEq;
}
static int convertToDec(int intEq[]) {
int result = 0;
int mult = 1; //multiplier
for (int j = intEq.length - 1; j >= 0; j--) {
result += intEq[j]*mult;
mult *= 16;
}
return result;
}
public static void main(String args[]) {
String hex;
int intEq[];
// Receive hex value from a user
hex = JOptionPane.showInputDialog(null, "Input hex: ");
try {
// convertToInt() method will throw InvalidHexExceptions if
// the value is not in a valid format
intEq = convertToInt(hex);
Integer dec = new Integer(convertToDec(intEq));
// Display the result
JOptionPane.showMessageDialog(null, dec);
System.exit(0);
} catch (InvalidHexException e) {
JOptionPane.showMessageDialog(null, "InvalidHexException is
caught: Enter valid hex value");
}
System.exit(0);
}
}
Here's the question:
Modify HexToDec.java so that when a negative value such as -100 is
entered, trigger a different exception called
NegativeValueEnteredException
They want us to modify this. How did you modify the lab? I'm curious
what other people did to perfect this...
Thanks,
Tammy Estes
Programmer Analyst
DAFS/OIT
Application Development and Management (ADAM)
Tel: 207.624.8287
Cell: 207.592.3710
[EMAIL PROTECTED]
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