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How to convert byte array to File in Java?
byte[] objFileBytes, File objFile 
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A byte in Java is 8 bits. It is a primitive data type, meaning it comes packaged with Java. Bytes can hold values from -128 to 127. No special tasks are needed to use it; simply declare a byte variable and you are off to the races.
In short, to write a byte array to a file using a FileOutputStream you should: Create a new File instance by converting the given pathname string into an abstract pathname. Create a new FileOutputStream to write to the file represented by the specified File object.
write(bytes, new File(path)); With Apache Commons: FileUtils. writeByteArrayToFile(new File(path), bytes);
Java ByteArrayOutputStream class is used to write common data into multiple files. In this stream, the data is written into a byte array which can be written to multiple streams later. The ByteArrayOutputStream holds a copy of data and forwards it to multiple streams.
A File object doesn't contain the content of the file. It is only a pointer to the file on your hard drive (or other storage medium, like an SSD, USB drive, network share). So I think what you want is writing it to the hard drive.
You have to write the file using some classes in the Java API
BufferedOutputStream bos = new BufferedOutputStream(new FileOutputStream(yourFile)); bos.write(fileBytes); bos.flush(); bos.close(); You can also use a Writer instead of an OutputStream. Using a writer will allow you to write text (String, char[]).
BufferedWriter bw = new BufferedWriter(new FileWriter(yourFile)); Since you said you wanted to keep everything in memory and don't want to write anything, you might try to use ByteArrayInputStream. This simulates an InputStream, which you can pass to the most of the classes.
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