java Programming Glossary: filechannel

http://stackoverflow.com/questions/116574/java-get-file-size-efficiently

googling I see that using java.io.File#length can be slow. FileChannel has a size method that is available as well. Is there an efficient..

Java NIO FileChannel versus FileOutputstream performance / usefulness

http://stackoverflow.com/questions/1605332/java-nio-filechannel-versus-fileoutputstream-performance-usefulness

NIO FileChannel versus FileOutputstream performance usefulness I am trying.. difference in performance or advantages when we use nio FileChannel versus normal FileInputStream FileOuputStream to read and write.. machine both perform at the same level also many times the FileChannel way is slower. Can I please know more details comparing these..

Create thumbnail image for PDF in Java

http://stackoverflow.com/questions/2844961/create-thumbnail-image-for-pdf-in-java

test.pdf RandomAccessFile raf new RandomAccessFile file r FileChannel channel raf.getChannel ByteBuffer buf channel.map FileChannel.MapMode.READ_ONLY.. channel raf.getChannel ByteBuffer buf channel.map FileChannel.MapMode.READ_ONLY 0 channel.size PDFFile pdffile new PDFFile..

How to unmap a file from memory mapped using FileChannel in java?

http://stackoverflow.com/questions/2972986/how-to-unmap-a-file-from-memory-mapped-using-filechannel-in-java

to unmap a file from memory mapped using FileChannel in java I am mapping a file sample.txt to memory using FileChannel.map.. in java I am mapping a file sample.txt to memory using FileChannel.map and then closing the channel using fc.close . After this.. sample.txt RandomAccessFile raf new RandomAccessFile f rw FileChannel fc raf.getChannel MappedByteBuffer mbf fc.map FileChannel.MapMode.READ_ONLY..

Move / Copy File Operations in Java

http://stackoverflow.com/questions/300559/move-copy-file-operations-in-java

IOException if destFile.exists destFile.createNewFile FileChannel source null FileChannel destination null try source new FileInputStream.. destFile.createNewFile FileChannel source null FileChannel destination null try source new FileInputStream sourceFile .getChannel..

I don't understand file locking

http://stackoverflow.com/questions/4025721/i-dont-understand-file-locking

import java.io.RandomAccessFile import java.nio.channels.FileChannel import java.nio.channels.FileLock public abstract class LockedFileOperation.. throw new FileNotFoundException file.getAbsolutePath FileChannel channel new RandomAccessFile file rw .getChannel try Get an.. that is under the lock. EDIT According to the JavaDoc on FileChannel.lock it is the same as calling FileChannel.lock 0L Long.MAXVALUE..

Convert PDF to thumbnail image in Java [closed]

http://stackoverflow.com/questions/4929813/convert-pdf-to-thumbnail-image-in-java

RandomAccessFile raf new RandomAccessFile pdfFile r FileChannel channel raf.getChannel ByteBuffer buf channel.map FileChannel.MapMode.READ_ONLY.. channel raf.getChannel ByteBuffer buf channel.map FileChannel.MapMode.READ_ONLY 0 channel.size PDFFile pdf new PDFFile buf..

Export PDF pages to a series of images in Java

http://stackoverflow.com/questions/550129/export-pdf-pages-to-a-series-of-images-in-java

import java.nio.ByteBuffer import java.nio.channels.FileChannel import javax.swing. import javax.imageio. import java.awt.image... test.pdf RandomAccessFile raf new RandomAccessFile file r FileChannel channel raf.getChannel ByteBuffer buf channel.map FileChannel.MapMode.READ_ONLY.. channel raf.getChannel ByteBuffer buf channel.map FileChannel.MapMode.READ_ONLY 0 channel.size PDFFile pdffile new PDFFile..

Android: simple export and import of sqlite database

http://stackoverflow.com/questions/6540906/android-simple-export-and-import-of-sqlite-database

fromFile FileOutputStream toFile throws IOException FileChannel fromChannel null FileChannel toChannel null try fromChannel.. toFile throws IOException FileChannel fromChannel null FileChannel toChannel null try fromChannel fromFile.getChannel toChannel..