1. Any code tips for speeding up random reads from a Java FileChannel? stackoverflow.comI have a large (3Gb) binary file of doubles which I access (more or less) randomly during an iterative algorithm I have written for clustering data. Each iteration does about ... |
2. Random Access of file stackoverflow.comInput = Line number. Output = Replace the line at given line number by new line. example = a.txt |
3. is it possible to access objects randomly in java? stackoverflow.combasically I have a file of String Objects. I used Java ObjectOutputStream to store the objects. Is it possible to access the objects(Strings) randomly, say if I want to ... |
4. BufferedInputStream not working with random seeks in file stackoverflow.comThe write procedure to my file was as follows (in the mode which I call non-clustered)
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5. randomly reading from the stream ?? coderanch.com |
6. Random Access Files coderanch.comI've just started using random access files and need to know what i'm doing wrong. I've made a test program (just to learn how to work with them) but it dosn't work properlly. The first part of the program reads in names entered by the user and should work like this: read in name from user write to file repeat until ... |
7. Random Access Files coderanch.com |
8. Random Access Files coderanch.comI've just started using random access files and need to know what i'm doing wrong. I've made a test program (just to learn how to work with them) but it dosn't work properlly. The first part of the program reads in names entered by the user and should work like this: read in name from user write to file repeat until ... |
9. How to randomly access a file coderanch.comAfter creating a file reference, I'd like to read a header and then at various times seek to various positions (based upon the contents of the header). Using reset() fails to work as apparently |
10. Random Access Files coderanch.comHi, I have a question regarding the "best" way to work with a RandomAccessFile. I have a program that works, but which is probably rather crude, and so I am wanting to find out if there is a more efficient and elegant way to achieve what I'm doing. My program writes records (a String and an int) to a RandomAccessFile using ... |
11. Deleting Random Access Files coderanch.com |
12. Random stream cut off coderanch.comHey all, I have designed a class, specifically designed for unix systems which dumps a specified number of bytes from the /dev/random block device to a specified binary file. Unfortunately I discovered that while java will read and copy 128 bytes of data, after that, the stream puts out zeros. IE: If I request a 256 byte file, it will give ... |
13. random access files coderanch.comI am writing a student databse program in java files. I have some serious problems. I am able to insert the data correctly into the file and can not retrive the specified data item only first colum needed,more over how to update a recoed and delete a paeticular student recoed 4rom a random access files. I use only 4 fields for ... |
14. bufferedReader.readLine() random order of lines ? coderanch.com |
15. Random Access Files trouble forums.oracle.comYes, I agree, I didn't look at much of that code because there's way too much of it to read. This data you're expecting something (an applet?) to display, is it actually in the file? If so then you could forget about showing us the code that put the data in the file. But if not then you should start looking ... |
16. Using Random Access Files forums.oracle.com |
17. Random access of ObjectOutputStream forums.oracle.com |
18. InputStream.read() returning random results? forums.oracle.comMaybe I'm missing something, but where exactly do you check the return value of in.read() for -1? That's what you'll get when you reached the end of the stream. I see 3 read() calls in your code and each one either masks a possible -1 value by doing "& 0xff" or ignores the return value entirely! So I'm have a pretty ... |
19. Imge from Random AccesFile or FileReader forums.oracle.comjava.io.Reader and all of its subclasses (which includes FileReader) are meant to be used to do text related IO operations. Instead of a reader use the InputStream equivalent (in this case FileInputStream and maybe wrap that one in BufferedInputStream). See the [Java IO tutorial|http://java.sun.com/docs/books/tutorial/essential/io/] for basic information on how to do IO. |
20. RandomAccessFile...appending randomly forums.oracle.com |
21. do random access files work with the JAR file format? forums.oracle.comHi everyone, I'm writing a little program (using BlueJ) and i need to make a JAR file of that program to run it independently of BlueJ. In one of the classes in the program, i have a random access file, which contans a list of records. When i create the JAR file and run it, i can not access the random ... |
22. Using Random Access Files forums.oracle.comRight so, my problem: When i want to add in a string, i have to use writeUTF() right? i'm not sure on either how to make a "blank" area for a string, since it could be of variable bytes. i've tried experimenting with a few things like in that loop there putting myFile.writeUTF(" "); but that obviously doesn't work. so basically ... |
23. Random Access Files forums.oracle.comI am trying to find the total number of records in a random access file Is there any way by which I could have a value and increment that each time record is created? But even if i do that; as soon as application ends the value would be deleted. So is there any way by which i could use record ... |
24. Random Access on a file forums.oracle.comHello everybody, I have a text file which conatins m*n 2d matrix m and n can be greater than 20000 also. Aprt from this matrix it can also have comments in between like this "# This is a comment". I want to have random access in that file. I know this can be achieved using RandomAccessFile class. But can anyone tell ... |
25. Random Access Files forums.oracle.comThat was exactly the problem! Thanks a lot for the reply. I was overlooking the problem thinking it was larger. I know the code it not very pretty but I am still learning the language in school. Would you prefer passing it by reference to avoid a call to the copy constructor or how? Not pass the file at all? Thanks. ... |
26. FileOutputStream ads a random number string to name file forums.oracle.com |