ITI1120

java.lang.Object
- ITI1120

```
public class ITI1120
extends java.lang.Object
```
The purpose of this class is to provide convenient methods for reading input from the keyboard.
Two sets of read methods are provided.
- readInt(), readDouble(), readChar(), readBoolean(), readString(): read one value of the specified type
- readIntLine(),readDoubleLine(),readCharLine(): read all values from a line, create an array of the proper length, and put the values into the array.
None of these methods allow values of different types to be read from the same line of input.
Note that Integer.parseInt() does not allow a leading + so, for example, +123 will be rejected. However, the double reader does not require a leading 0 so, for example, -.2 will be accepted.
Author:

Alan Williams

Method Summary

Methods
Modifier and Type	Method and Description
`static boolean`	`readBoolean()` Read a single `boolean` value from the keyboard.
`static char`	`readChar()` Read a single `char` value from the keyboard.
`static char[]`	`readCharLine()` Read an array of `char` values from the keyboard.
`static double`	`readDouble()` Read a single `double` value from the keyboard.
`static double[]`	`readDoubleLine()` Read an array of `double` values from the keyboard.
`static int`	`readInt()` Read a single `int` value from the keyboard.
`static int[]`	`readIntLine()` Read an array of `int` values from the keyboard.
`static java.lang.String`	`readString()` Read a String from the keyboard.

Methods inherited from class java.lang.Object
equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Method Detail
  - readInt
```
public static int readInt()
```
    Read a single int value from the keyboard.
    If the user enters a non-int value, a NumberFormatException will be thrown, and the program will terminate. Typing return without entering any value will also produce this result.
    
    Returns:
    An int containing the value entered from the keyboard.
  - readDouble
```
public static double readDouble()
```
    Read a single double value from the keyboard.
    If the user enters a non-double value, a NumberFormatExceptionwill be thrown, and the program will terminate. Typing return without entering any value will also produce this result.
    
    Returns:
    A double containing the value entered from the keyboard.
  - readBoolean
```
public static boolean readBoolean()
```
    Read a single boolean value from the keyboard.
    If the user enters any variation of the word "true" in upper, lower, or mixed case, the result will be the boolean value true. Otherwise, the result will be the boolean value false.
    
    Returns:
    A boolean containing the value entered from the keyboard.
  - readChar
```
public static char readChar()
```
    Read a single char value from the keyboard.
    If the types return without entering any character, a StringIndexOutOfBoundsException will be thrown, and the program will terminate. Otherwise, the first character of what the user typed will be returned as a char value.
    
    Returns:
    A char containing the value entered from the keyboard.
  - readDoubleLine
```
public static double[] readDoubleLine()
```
    Read an array of double values from the keyboard.
    The values must be separated by at least one space as they are entered.
    If the user enters a non-double value, a NumberFormatExceptionwill be thrown, and the program will terminate.
    If all values are legal double values, a new array is created. The length of the array is set by counting the number of values entered by the user. The values are then entered into the corresponding array positions.
    
    Returns:
    An array of double values containing the set of values entered from the keyboard.
  - readIntLine
```
public static int[] readIntLine()
```
    Read an array of int values from the keyboard.
    The values must be separated by at least one space as they are entered.
    If the user enters a non-int value, a NumberFormatException will be thrown, and the program will terminate.
    If all values are legal double values, a new array is created. The length of the array is set by counting the number of values entered by the user. The values are then entered into the corresponding array positions.
    
    Returns:
    An array of double values containing the set of values entered from the keyboard.
  - readCharLine
```
public static char[] readCharLine()
```
    Read an array of char values from the keyboard.
    After the user has entered a string of characters, hitting 'enter' returns to the calling method. All characters including spaces are put in the array.
    The String entered by the user is converted to an array of characters of the appropriate length.
    
    Returns:
    An array of char values containing the set of characters entered from the keyboard.
  - readString
```
public static java.lang.String readString()
```
    Read a String from the keyboard.
    
    Returns:
    A String containing the user's input.

Class ITI1120

Method Summary

Methods inherited from class java.lang.Object

Method Detail

readInt

readDouble

readBoolean

readChar

readDoubleLine

readIntLine

readCharLine

readString