readLine() in Java

Readline Method of Console Class

The readLine() method of Console class is used to read a one-line text from the console specifically.

The readLine() method of Console class has two variations:

readLine()

Syntax

Parameter

It doesn't take any parameter.

Return Value

It returns the String after reading it from the console. Returns null if input stream has ended.

Code

Output:

Exception

The readLine() method of Console class does not throw any exceptions.

readline(String format, Object... args)

This method provides a formatted prompt and reads a single line of text from the console.

syntax

Parameters

• format: A format string to accordingly parse the input text.
• args: It holds the arguments in the String format that are referenced by the format specifiers. If the number of arguments exceeds the count of format specifiers, excess arguments are ignored.

Return

Returns a String that is read from console. Returns null if the input stream has ended.

Code

Output:

Exception

• IllegalFormatException: This exception is thrown in three conditions:
  • Illegal syntax of the format argument
  • Incompatible format specifier with the arguments provided in the readLine() method
  • Insufficient arguments and other conditions
• IOError: If an I/O error occurs.

readLine() method of BufferedReader Class

The readLine() method of BufferedReader classs reads a one-line text from an input source, for example, a file.

Syntax

Parameter

No Parameters.

Return

• Returns content of a single line.

• null if the output stream has ended.

Example:

Content of "code.txt":

Output

Exception

• IOException: If an I/O error occurs, this exception is thrown.