Java.io.File extension proposal
Hi, i have made an extension to java.io.File that right now lets you find out free disk space, used disk space and all mounted volumes.
I currently have code for linux only and i'm looking for help porting it to win32.
I put up a project page on http://mog.se/mogio.html
I'm aware of projects like JConfig and i'm not interested in it because of their license and their totally different API. se.mog.io.File extends File to work just like a normal java.io.File with some additional methods, in the spirit of java.io.File. :)
Any help in coding or feedback is appreciated, be it negative or positive. :)
/mog
listMounts() is intended to be like listRoots() but
show mounted volumes below the root.I thought about this too, but the mounts themselves wouldn't really be `below' the root as one could mount anywhere in the Unix fs tree. Now wouldn't the mounts actually be the roots in Winblows?
What would be nice would be some metric given any given java.io.File directory, such as I may know that the directory has a metric that lets me know the quality of the disk such as a good SCSI array for persistent storage vs. a single IDE for a scratch or temp dir.
I'm not aware of AS/400 or any anti-OS pro-JVM devices
but would java.io.File be applicable there anyway?File would be of course applicable for the IFS on AS/400, but it's been a LONG time (read deploying on 1.1 V4R?) since I've used the 400 and I don't have detailed knowledge on storage management there, so I may need to defer to someone on that architecture to know about mounts, etc.
There is however a really small group of people who feel that all storage should be secondary or auxillary storage (I'm partially one of them) and when you need to access data, you peek at a memory location (to which of course you would have access) or pointer|reference|et al. The OS is then responsible for intelligently paging that data in/out of primary memory for access, like a super-mega-MM, or conversely just read from the secondary itself, either way the VM wouldn't care. We're a ways away from an OS/JVM combo like this though and I feel it will be a long time until we get rid of the traditional thought process of filesystems.
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Trying to write data to a text file using java.io.File
I am trying to create a text file and write data to it by using java.io.File and . I am using JDeveloper 10.1.3.2.0. When I try run the program I get a java.lang.NullPointerException error. Here is the snippet of code that I believe is calling the class that's causing the problem:
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May be that can help:
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* @author Fabre tristan
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[pre]
This class contained some other functions i've deleted, but i think it still works.
That enables to create a log (.txt file) that you can fill line by line.
Each line start by the current system date. This class was used in swing application, but could work in a web app.
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Tif -
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Hi,
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Best regards
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As Kevin pointed out this is related to filtering of files.
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Hello everybody,
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How can I achieve this with java?Welcome to the forum!
When you post your class assignments you should provide the class name, teacher name, textbook used and the exact instructions for the lesson as presented by your teacher.
>
Read all files from a folder in the same directory
Files with the same name but different extension
On .txt extensions,count the number of words,the start and end offset of each word,output into a textfiles
Merge a1,a2,ann,rel(other file extensions),on read each line,and store it into a data-structure
Join results of 3,4 and output into a new folder <previousfolder>_result
What are the operations that I can use to achieve this with java?
How can I achieve this with java?
>
Have you covered all of those concepts in your class?
Did you ask you instructor to explain any of the steps you did not understand?
Have you written, compiled and run any Java classes at all yet?
Post the code you have written so far, explain what it does and what it does wrong and you will get advice about how to find and fix the problem.
Break the problem into pieces. Start by writing code that
>
Read all files from a folder in the same directory
Files with the same name but different extension
>
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What is file extension .class?
I am new to java and want to know what the file extension .class is and how do I open and edit a file with this extension?
.class files are created by the compiler from .java file, which is your code... if you're new to java, you probably don't want to open and edit your .class files. If you want to make changes to your program, open the .java and recompile.
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jetq wrote:
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Hello All,
I'm trying to use JFileChooser in my Swing application with following conditions:
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I've already acheived the 1st objective.
However, I am unable to block the display of file extension when JFileChooser opens.
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I've saved my program in Notepad with the .java file extension, but when I run dir command in DOS, the file ends with the .txt file extension (i.e. HelloWorld.java.txt). Could someone give me a clue how to keep Notepad from automatically ending my program with this .txt file extension.? I've have not encountered this problem before.
ThanksThanks for your help.
I figured out that I didn't have the .java file extension defined in Windows. Because Notepad didn't recognize .java as a valid file type, it would automatically assign the .txt after my program files.
To fix this...
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Thanks for your responses.
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