How to write byte array to outputstream in java

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After the first part of the series was about reading files in Java , this second part introduces the corresponding methods for writing small and large files. I already mentioned the topic of operating system independence in the first part, i. Up to and including Java 6, there was no easy way to write files. You had to open a FileOutputStream or a FileWriter , if necessary, wrap it with a BufferedOutputStream or BufferedWriter , write into it, and finally — also in case of an error — close all streams again. In Java 7, the utility class java. Files was added with the "NIO.
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Java ByteArrayOutputStream Class

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FileOutputStream in Java - GeeksforGeeks

FileOutputStream is a subclass of OutputStream. To write primitive values into a file, we use FileOutputStream class. For writing byte-oriented and character-oriented data, we can use FileOutputStream but for writing character-oriented data, FileWriter is more preferred. What is meant by storing data to files? Through the above image, we can understand that when we run the java program, the data is stored in the RAM.
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Java ByteArrayOutputStream

I was playing with my code for 24 hours but could not fix the problem. I looked at this example and I was able to fix my problem. I was trying to write a new line to a binary file. I learn many things from this site using different examples.
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Join Stack Overflow to learn, share knowledge, and build your career. Connect and share knowledge within a single location that is structured and easy to search. How can I convert an OutputStream to a byte array? There is only write method in this OutputStream class and I don't know what to do. Is there any idea?
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