The code below have some logic error.

Here is the code

import java.io.File; import java.io.IOException; import java.util.HashMap; import java.util.Map; import java.util.Scanner; class Validator { public static void main(String args[]) throws IOException {

Scanner scanner = new Scanner(new File(args[0]));

Map stateTransitions = new HashMap();

while(scanner.hasNextLine()) { stateTransitions.put(new StateTransition(scanner.nextInt(), scanner.next().toCharArray()[0]), scanner.nextInt()); }

scanner = new Scanner(new File(args[1])); String inputString = scanner.next(); scanner.close();

Integer currentState = 0; int i=0; System.out.println("Testing with input string : " + inputString);

for(i=0; i

if(currentState == null) { System.out.println("Failure at position " + i + " found character " + inputString.charAt(i)); break; }

else if(currentState == 999) { System.out.println("Success"); break; } }

if(i == inputString.length()) { System.out.println("Input string ended before success transition"); } } }

> run Validator

java.lang.ArrayIndexOutOfBoundsException: 0

at Validator.main(Validator.java:12)

at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)

at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)

at java.lang.reflect.Method.invoke(Unknown Source)

at edu.rice.cs.drjava.model.compiler.JavacCompiler.runCommand(JavacCompiler.java:267)

> run Validator statemachine.txt 112.txt

Testing with input string : aCb

Failure at position 1 found character C

112.txt has more than one line content. However this code only read and deal with first line. There should be some problem with the loop.