File truncate operation in Java

Question

What is the best-practice way to truncate a file in Java? For example this dummy function, just as an example to clarify the intent:

void readAndTruncate(Fil         


        

Answer 1

Use RandomAccessFile#read and push the bytes recorded in this way into a new File object.

RandomAccessFile raf = new RandomAccessFile(myFile,myMode);  
byte[] numberOfBytesToRead = new byte[truncatedFileSizeInBytes];  
raf.read(numberOfBytesToRead);    
FileOutputStream fos = new FileOutputStream(newFile);  
fos.write(numberOfBytesToRead);