TerminalIO
Class KeyboardReader

java.lang.Object
  |
  +--TerminalIO.KeyboardReader

public class KeyboardReader

extends java.lang.Object

The class KeyboardReader contains input methods for terminal I/O. Type-specific methods read characters, integers, doubles, and strings. Another method pauses output and waits for the user to press the enter key to continue. Examples:

   KeyboardReader reader = new KeyboardReader();
   char letter = reader.readChar  ("Enter a letter: ");
   double    d = reader.readDouble("Enter a real number: ");
   int       i = reader.readInt   ("Enter an integer: ");
   String name = reader.readLine  ("Enter your full name: ");
   reader.pause();

 

Constructor Summary

KeyboardReader()

Method Summary

void	pause() Used with non-GUI applications to prevents a "fly-by" disappearance of the terminal window in some environments by pausing execution until the user presses the Enter key.
char	readChar() Waits for character input without prompting the user.
char	readChar(java.lang.String prompt) Prompts the user and waits for character input.
double	readDouble() Waits for double input without prompting the user.
double	readDouble(java.lang.String prompt) Prompts the user and waits for double input.
int	readInt() Waits for integer input without prompting the user.
int	readInt(java.lang.String prompt) Prompts the user and waits for integer input.
java.lang.String	readLine() Waits for string input without prompting the user.
java.lang.String	readLine(java.lang.String prompt) Prompts the user and waits for string input.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

KeyboardReader

public KeyboardReader()

Method Detail

pause

public void pause()

Used with non-GUI applications to prevents a "fly-by" disappearance of the terminal window in some environments by pausing execution until the user presses the Enter key. Usage: reader.pause();

readInt

public int readInt(java.lang.String prompt)

Prompts the user and waits for integer input. Throws an exception if the input doesn't represent an integer. Returns the integer entered.

Parameters:

prompt - the prompt to the user.

readInt

public int readInt()

Waits for integer input without prompting the user. Throws an exception if the input doesn't represent an integer. Returns the integer entered.

readDouble

public double readDouble(java.lang.String prompt)

Prompts the user and waits for double input. Throws an exception if the input doesn't represent a double. Returns the double entered.

Parameters:

prompt - the prompt to the user.

readDouble

public double readDouble()

Waits for double input without prompting the user. Throws an exception if the input doesn't represent a double. Returns the double entered.

readChar

public char readChar(java.lang.String prompt)

Prompts the user and waits for character input. Returns the char entered.

Parameters:

prompt - the prompt to the user.

readChar

public char readChar()

Waits for character input without prompting the user. Returns the char entered.

readLine

public java.lang.String readLine(java.lang.String prompt)

Prompts the user and waits for string input. Returns the entire line of text entered.

Parameters:

prompt - the prompt to the user.

readLine

public java.lang.String readLine()

Waits for string input without prompting the user. Returns the entire line of text entered.