filechannel

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Java NIO: transferFrom until end of stream

I\'m playing around with the NIO library. I\'m attempting to listen for a connection on port 8888 and once a connection is accepted, dump everything from t开发者_如何学Chat channel to somefile.[详细]

2023-04-11 05:35 分类：问答
FileChannel.write on Linux produces lots of garbage, but not on Mac

I am trying to limit the amount of garbage produced by my log library, so I coded a test to show me how much memory is FileChannel.write creating. The code below allocates ZERO memory on my Mac, but c[详细]

2023-04-06 11:01 分类：问答
Can multiple threads see writes on a direct mapped ByteBuffer in Java?

I\'m working on something that uses ByteBuffers built from memory-mapped files (via FileChannel.map()) as well as in-memory direct ByteBuffers.I am trying to understand the concurrency and memory mode[详细]

2023-03-27 01:15 分类：问答
Processing huge pipe delimited files

With reference开发者_开发百科 to my previous post Remove first line from a delimited file I was able to process smaller files and remove the first line .... but incase of huge files there is an issu[详细]

2023-03-21 14:14 分类：问答
Loading raw VBO data via MappedByteBuffer into OpenGL (not working)

I\'ve attempted to load raw, uncompressed VBO data via the method presented in a talk Google did at GDC 2011. This method uses a MappedByteBuffer to quickly load the data in a subsequent call to glBuf[详细]

2023-03-20 22:36 分类：问答
Remove first line from delimited file

I have a delimited file which can contain around millions of records , now I want to delete the first line from the delimited file before processing it further.[详细]

2023-03-20 06:47 分类：问答
Using FileChannel to write any InputStream?

Can I write any InputStream into a FileChannel? I\'m using java.nio.channels.FileChannel to open a file and lock it, then writing a InputStream to the output file. The InputStream may be opened by an[详细]

2023-03-18 16:59 分类：问答
FileInput/OutputStream versus FileChannels -- which gives better performance

I am writing a program that has to copy a sizeable, but not huge amount of data from folder to folder (in the range of several dozen photos at once).Originally I was using java.io.FileOutputStream to[详细]

2023-03-17 06:32 分类：问答
Fastest way to write a FloatBuffer or Float(float) array to a file in Java

I\'ve got a bunch of float data in a FloatBuffer which needs to be written to a file (without it taking three minutes). Currently a DataOutput开发者_开发技巧Stream is used to write the FloatBuffer ele[详细]

2023-03-17 06:08 分类：问答
How to use java.nio.channels.FileChannel to read to ByteBuffer achieve similiar behavior like BufferedReader#readLine()

I want to use java.nio.channels.FileChannel to read from a file, but I want to read line per line like BufferedReader#readLine() does. The reason why I need to use java.nio.channels.FileChannel instea[详细]

2023-03-12 16:28 分类：问答