Exploring Java File IO
The FileInputStream(String filename) constructor in Java creates an input stream to a specified file, while the FileOutputStream(String filename) constructor creates an output stream. Both constructors handle FileNotFoundException if the file does not exist or other related issues.
FileInputStream allows reading one byte at a time with the int read() method, returning -1 at the end of the file. On the other hand, FileOutputStream provides a method to write a byte to the output stream. Both methods may throw IOException in case of errors.
The article discusses a code example that copies a file using a while loop to read and write bytes between input and output streams until the end of the file is reached.
Java Exception Handling
Java uses catch blocks to handle exceptions. These blocks can catch specific throwable types and execute custom handling logic for each type of exception.
The catch block
The catch block delimits exception-handling statements in Java. It catches specific throwable types and allows for customized exception handling logic.
Multiple catch blocks can be used after a try block to handle different types of exceptions.
Using finally blocks to clean up exceptions
Finally blocks in Java are used for cleanup tasks, such as closing file streams, regardless of whether an exception is thrown or not.
The finally block ensures that resources are properly released even if an exception occurs during the execution of the try block.
In conclusion
This article provides an introduction to Java file IO and exception handling. The second part of this tutorial will cover more advanced features such as try-with-resources for improved resource management.