| User | Post |
neotransotaku
Posts: 313/4016 |
that won't work because he wants bytes 0x1200 through 0x120f, not the string "1200". to do what he wanted, your code would have to say:
inputstring.substring(0x1200, 0x1210);
that would work if he read the entire file as text. however, because Java is unicode, meaning 1 character is two bytes, that might not do as he want. therefore, he should stick with the File I/O classes Java provides. |
HellSavior
Posts: 4/41 |
Originally posted by Apophis
I see there how to read the data into the buffer at a certain offset, but how do I read the data from a particular offset in the file, ie bytes 1200-120f of the file.
Can you not input the line as a string, then do
inputstring.substring(inputstring.indexOf("1200"),inputstring.length());
, to grab the string after the offset? |
MathOnNapkins
Posts: 16/2189 |
Apophis, I had to learn about file input and output in Java for one of my recent projects. If you have any questions feel free to ask. But some of my methods may be a little bit of overkill, in that they use File Channels.
I wrote a class specifically for reading files called GenericFileIO. Ask if you'd want it. |
neotransotaku
Posts: 239/4016 |
Yes, it would be...anyways, if you have any Java questions, don't hesitate to ask me...I think I'm this board's only Java expert...and only Java advocate...heh |
Apophis
Posts: 115/882 |
Thanks. I'm hoping to write editors in the future. Would be hard if I couldn't do this. |
neotransotaku
Posts: 228/4016 |
You want to use Java.io.RandomInputFile. Then call it's seek method to move the "head" to where you want it to start reading. Then start reading away. |
Apophis
Posts: 112/882 |
I see there how to read the data into the buffer at a certain offset, but how do I read the data from a particular offset in the file, ie bytes 1200-120f of the file. |
Master Vivi
Posts: 5/46 |
Did you try the InputStream read method? |
Apophis
Posts: 109/882 |
Does anyone know how to read hex data from a particular offset in Java? My textbook only covers reading strings sequentially, terminating everytime it reaches the end of line value. |
