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Summary: Learn how to effectively use BufferedReader in Java to read entire files and individual lines with code examples and best practices.
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Have you ever needed to read data from a file efficiently in Java? Understanding how to use BufferedReader can greatly enhance your file-reading operations. Whether you're reading entire files or just specific lines, BufferedReader provides a streamlined approach.

What is BufferedReader?

BufferedReader is a class in java.io package that simplifies reading text from character input streams. It buffers characters for efficient reading of characters, arrays, and lines.

How to Use BufferedReader in Java

To begin, you'll need to import the necessary classes:

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Then, you can create a BufferedReader instance to read from a file:

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The BufferedReader wraps around a FileReader, providing methods like readLine() which reads data line by line.

How to Read Entire Files Using BufferedReader

When reading an entire file, use a loop to read each line sequentially until the end of the file. Here's a refined way:

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Using try-with-resources ensures the BufferedReader is closed after the operation is complete, even if an exception is thrown.

How to Read Next Line Using BufferedReader in Java

Reading the next line in a file can be achieved easily with the readLine() method:

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This method reads and returns the next line of text, or null if the end of the stream is reached.

Conclusion

Mastering the BufferedReader class can significantly improve your file reading capabilities in Java. Whether you're working with small text files or larger ones, this utility class ensures efficient and straightforward reading.

Understanding how to use BufferedReader effectively allows you to handle files and text streams more efficiently, making your Java applications more robust and performant.

Experiment with the examples provided and explore additional capabilities of the BufferedReader to make the most out of Java's I/O functionalities.