Class UI

java.lang.Object

UI

public class UI
extends java.lang.Object

Aid user keyboard input with prompts and error catching.

Constructor Summary

Constructors

Constructor	Description
UI()

Method Summary

Modifier and Type	Method	Description
static boolean	agree(java.lang.String question)	Print a question and return a response.
static java.util.Scanner	getKeyboardScanner()	Encourage ONLY ONE keyboard Scanner.
static char	promptChar(java.lang.String prompt)	Prompt for a character.
static double	promptDouble(java.lang.String prompt)	Prompt and read a double.
static double[]	promptDoubleArray(java.lang.String prompt)	Prompt and read a line of numbers.
static int	promptInt(java.lang.String prompt)	Prompt and read an int.
static int[]	promptIntArray(java.lang.String prompt)	Prompt and read a line of integers.
static java.lang.String	promptLine(java.lang.String prompt)	Prompt the user for a line and return the line entered.

Methods inherited from class java.lang.Object

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

Constructor Detail

UI

public UI()

Method Detail

getKeyboardScanner

public static java.util.Scanner getKeyboardScanner()

Encourage ONLY ONE keyboard Scanner.

Returns:

the Scanner reading the keyboard.

promptLine

public static java.lang.String promptLine(java.lang.String prompt)

Prompt the user for a line and return the line entered.

Parameters:

prompt - The prompt for the user to enter the input line.

Returns:

The line entered by the user.

promptChar

public static char promptChar(java.lang.String prompt)

Prompt for a character.

Parameters:

prompt - The prompt for the user to enter a character

Returns:

The first character of the line entered or a blank if the line is empty.

agree

public static boolean agree(java.lang.String question)

Print a question and return a response. Repeat until a valid answer is given.

Parameters:

question - The yes/no question for the user to answer.

Returns:

True if the answer is yes, or False if it is no.

promptInt

public static int promptInt(java.lang.String prompt)

Prompt and read an int. Repeat until there is a legal value to return. Read through the end of the line

Parameters:

prompt - The prompt for the user to enter a value.

Returns:

The value entered by the user.

promptDouble

public static double promptDouble(java.lang.String prompt)

Prompt and read a double. Repeat until there is a legal value to return.

Parameters:

prompt - The prompt for the user to enter a value.

Returns:

The value entered by the user.

promptIntArray

public static int[] promptIntArray(java.lang.String prompt)

Prompt and read a line of integers. Repeat until there is a legal line to process.

Parameters:

prompt - The prompt for the user to enter data.

Returns:

The int values entered by the user.

promptDoubleArray

public static double[] promptDoubleArray(java.lang.String prompt)

Prompt and read a line of numbers. Repeat until there is a legal line to process.

Parameters:

prompt - The prompt for the user to enter data.

Returns:

The double values entered by the user.