Java binary file offset

Read a file and print, using BufferedReader and System. Open File By Name Testing for end of file while reading a byte at a time File Locking Getting channels from streams A word counting utility with FileReader. Reads sequentially from multiple sources Reader for the ISO encoding. This class is an part implementation of DataInput. It wraps a Reader object. A StraightStreamReader is a bridge from byte streams to character streams Ask Question.

Asked 5 years, 10 months ago. Active 3 years, 8 months ago. Viewed 9k times. Improve this question. Sergey Shustikov Sergey Shustikov FileInputStream has method read byte[] b, int off, int len where you can specify start position.

Add a comment. Active Oldest Votes. Improve this answer. Denis Lukenich Denis Lukenich 2, 1 1 gold badge 17 17 silver badges 38 38 bronze badges. Thank you. But I got java. UnsupportedOperationException at java. It runs fine when allocate method is used.

Such standards allow you to store a wider range of characters in your text files and read them easily. There are even more advanced file formats like DOC and DOCX, which couple text and binary files to provide users with a better experience.

DOCX, for instance, is a standard used by Microsoft Word to store text files along with metadata that can help view the textual content better inside the Word application. If you want to check it out for yourself, try renaming a document. Binary files provide multiple benefits compared to plain text files. Data is stored in binary files according to custom rules for use-case specific optimizations.

PNG is a great example of this because it can be used to create small and efficient image files. Once again, the customization that binary files offer allows businesses to create custom encoding standards, which can be difficult to reverse engineer. More often than not, the only way to read a custom-encoded binary file is to guess how data has been stored in it.

As the data is stored in a raw format, and is not encoded using any character encoding standards, it is faster to read and store. This is the primary reason why data stores for applications are not built using plain text files. While binary files offer many benefits over plain text files, they also present several issues.

Following are the most common problems faced when using binary files:. Binary files can not be read by conventional text processors, so editing them is a difficult task.

More often than not, applications choose to save their data using custom encoding schemes. This data can then be manipulated only inside of the applications with the same encoding scheme. While storing data in binary format might be fast and efficient in formats like PNG, other data types may not receive any noticeable performance benefits.

Storing textual data adds another hassle of encoding and decoding data while viewing. Computers can have different ways of storing and accessing data. When binary data is transmitted between two computers with different architectures, issues like NUXI can arise.

Having seen the various aspects of binary files, it is now important to understand where to use them. Here are some of the top use-cases of binary files:. Text files are the most popular standard for storing data among standard computer users as they are easy to read and can support formatting as well. But for people who are involved in software development, text files are usually a no-go in storing and processing data inside programs.

Configuration data related to software projects are usually stored in binary files. Binary files offer unmatched speed and efficiency when carrying out operations on the stored data. About us: Career Karma is a platform designed to help job seekers find, research, and connect with job training programs to advance their careers. Learn about the CK publication. Along with writing, he has also worked in software development roles with several start-ups and corporations alike.

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