Question

I have file with this specific format:

0  
2 4   
0 1 A  
0 5 B  
1 1 A  
1 3 B  
2 6 A  
2 4 B  
3 6 A  
3 4 B  
4 6 A  
4 4 B  
5 1 A  
5 5 B  
6 6 A  
6 2 B  

• line 1 = start state
• line 2 = accept state
• line 3 – n = transition table
• 1st row = state in
• 2nd row = state out
• A,B = symbol

How can my FileReader in Java read these file into 5 different ArrayLists (start state, final state, state in, state out and symbol)?

Answer 1

You can use the Scanner class to read the file (nextLine() is highly recommended). Since you know the positions of the items you need, you can then use the split method to parse the input string in what ever ArrayList you like.