Should FileReader be used to read a Java bytecode (*. class) file? A. No—bytecode files can only be executed, never read.

What does java IO FileReader do?

Java FileReader class is used to read data from the file. It returns data in byte format like FileInputStream class. It is character-oriented class which is used for file handling in java.

What method is used to notify the operating system that a file is no longer needed in java?

Basic Overview. The Object#wait() method is used within a synchronization block or member method and causes the thread it is called in to wait indefinitely until another thread calls Object#notify() (or it’s variation Object#notifyAll() ) on the same object that the original Object#wait() was called on.