What exception is thrown by methods of the BufferedReader class?
For example, an IOException is a checked exception. Some programs use the readLine() method of BufferedReader for input. This method throws an IOException when there is a problem reading. Programs that use BufferedReader for input need to do something about possible exceptions.
What is IO exception in Java?
IOException is the base class for exceptions thrown while accessing information using streams, files and directories. The Base Class Library includes the following types, each of which is a derived class of IOException : DirectoryNotFoundException.
Which exception should be caught at compile time while using BufferedReader class?
2 Answers. Since IOException is a checked exception, you must use either try… catch or ‘throws`.
What exception we need to handle when we are using BufferedReader?
When the buffered stream is closed, the BufferedReader can’t read anything more and will notify the caller about this fact by throwing an IOException . You need to handle IOException because it is a checked exception and method in. readLine() specifically declares it with a throws clause.
What is an example of checked exception?
Checked exceptions are the subclass of the Exception class. These exceptions can be handled by the try-catch block otherwise the program will give a compilation error. ClassNotFoundException, IOException, SQLException etc are the examples of the checked exceptions.
Is IOException checked exception?
Because IOException is a checked exception type, thrown instances of this exception must be handled in the method where they are thrown or be declared to be handled further up the method-call stack by appending a throws clause to each affected method’s header.
What causes an IO exception?
IOException is thrown when an error occurred during an input-output operation. That can be reading/writing to a file, a stream (of any type), a network connection, connection with a queue, a database etc, pretty much anything that has to do with data transfer from your software to an external medium.
Can exception catch FileNotFoundException?
FileNotFoundException which is a common exception which occurs while we try to access a file. FileNotFoundException occurs at runtime so it is a checked exception, we can handle this exception by java code, and we have to take care of the code so that this exception doesn’t occur.
Is IOException an unchecked exception?
All other exceptions are known as unchecked exceptions. Because IOException is a checked exception type, thrown instances of this exception must be handled in the method where they are thrown or be declared to be handled further up the method-call stack by appending a throws clause to each affected method’s header.
Why does BufferedReader throw IOException in Java?
Sometimes BufferedReader takes data from a network stream where the reading system can fail at any time. So this type of error can occur in input operation when a BufferedReader is used. This is why a buffered reader throws IOException. If the file is deleted from the server-side while reading the input from the server-side, IOException is thrown.
Which is the BufferedReader class in Java reader?
The most useful package that is provided for this is the java.io.Reader.This class contains the Class BufferedReader under package java.io.BufferedReader What is BufferedReader in Java? BufferedReader is Java class to reads the text from an Input stream (like a file) by buffering characters that seamlessly reads characters, arrays or lines.
How does BufferedReader read characters into an array?
Reads characters into a portion of an array. This method implements the general contract of the corresponding read method of the Reader class. As an additional convenience, it attempts to read as many characters as possible by repeatedly invoking the read method of the underlying stream.
What does mark method do in Java BufferedReader?
It repositions the stream at a position the mark method was last called on this input stream. It is used for marking the present position in a stream. It closes the input stream and releases any of the system resources associated with the stream.