IOModel (acm 2.1 API)

All Known Implementing Classes:

ConsoleProgram, DialogProgram, GraphicsProgram, IOConsole, IODialog, Program
```
public interface IOModel
```
The IOModel interface defines the input and output methods supported by both the IOConsole and IODialog classes.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method and Description
`void`	`print(boolean x)` Makes sure that `print` can display a `boolean`.
`void`	`print(char x)` Makes sure that `print` can display a `char`.
`void`	`print(double x)` Makes sure that `print` can display a `double`.
`void`	`print(float x)` Makes sure that `print` can display a `float`.
`void`	`print(int x)` Makes sure that `print` can display an `int`.
`void`	`print(long x)` Makes sure that `print` can display a `long`.
`void`	`print(java.lang.Object x)` Makes sure that `print` can display an `Object`.
`void`	`print(java.lang.String value)` Displays the argument value, allowing for the possibility of more output on the same line.
`void`	`println()` Completes the output line.
`void`	`println(boolean x)` Makes sure that `println` can display a `boolean`.
`void`	`println(char x)` Makes sure that `println` can display a `char`.
`void`	`println(double x)` Makes sure that `println` can display a `double`.
`void`	`println(float x)` Makes sure that `println` can display a `float`.
`void`	`println(int x)` Makes sure that `println` can display an `int`.
`void`	`println(long x)` Makes sure that `println` can display a `long`.
`void`	`println(java.lang.Object x)` Makes sure that `println` can display an `Object`.
`void`	`println(java.lang.String value)` Displays the value and then completes the line.
`boolean`	`readBoolean()` Reads and returns a boolean value from the user, which must match either `true` or `false`, ignoring case.
`boolean`	`readBoolean(java.lang.String prompt)` Prompts the user to enter a boolean value, which is then returned as the value of this method.
`boolean`	`readBoolean(java.lang.String prompt, java.lang.String trueLabel, java.lang.String falseLabel)` Prompts the user to enter a value, which is interpreted as a boolean value by matching it against the `trueLabel` and `falseLabel` parameters.
`double`	`readDouble()` Reads and returns a double-precision value from the user.
`double`	`readDouble(double low, double high)` Reads and returns a double-precision value from the user, which is constrained to be within the specified inclusive range.
`double`	`readDouble(java.lang.String prompt)` Prompts the user to enter an double-precision number, which is then returned as the value of this method.
`double`	`readDouble(java.lang.String prompt, double low, double high)` Prompts the user to enter an double-precision number, which is then returned as the value of this method.
`int`	`readInt()` Reads and returns an integer value from the user.
`int`	`readInt(int low, int high)` Reads and returns an integer value from the user, which is constrained to be within the specified inclusive range.
`int`	`readInt(java.lang.String prompt)` Prompts the user to enter an integer, which is then returned as the value of this method.
`int`	`readInt(java.lang.String prompt, int low, int high)` Prompts the user to enter an integer, which is then returned as the value of this method.
`java.lang.String`	`readLine()` Reads and returns a line of input, without including the end-of-line characters that terminate the input.
`java.lang.String`	`readLine(java.lang.String prompt)` Prompts the user to enter a line of text, which is then returned as the value of this method.
`void`	`showErrorMessage(java.lang.String msg)` Displays the error message.

- Method Detail
  - print
```
void print(java.lang.String value)
```
    Displays the argument value, allowing for the possibility of more output on the same line. The print method is overloaded so that value can be of any type.
    
    Parameters:
    
    value - The value to be displayed
  - print
```
void print(boolean x)
```
    Makes sure that print can display a boolean.
  - print
```
void print(char x)
```
    Makes sure that print can display a char.
  - print
```
void print(double x)
```
    Makes sure that print can display a double.
  - print
```
void print(float x)
```
    Makes sure that print can display a float.
  - print
```
void print(int x)
```
    Makes sure that print can display an int.
  - print
```
void print(long x)
```
    Makes sure that print can display a long.
  - print
```
void print(java.lang.Object x)
```
    Makes sure that print can display an Object.
  - println
```
void println()
```
    Completes the output line.
  - println
```
void println(java.lang.String value)
```
    Displays the value and then completes the line. The println method is overloaded so that value can be of any type.
    
    Parameters:
    
    value - The value to be displayed
  - println
```
void println(boolean x)
```
    Makes sure that println can display a boolean.
  - println
```
void println(char x)
```
    Makes sure that println can display a char.
  - println
```
void println(double x)
```
    Makes sure that println can display a double.
  - println
```
void println(float x)
```
    Makes sure that println can display a float.
  - println
```
void println(int x)
```
    Makes sure that println can display an int.
  - println
```
void println(long x)
```
    Makes sure that println can display a long.
  - println
```
void println(java.lang.Object x)
```
    Makes sure that println can display an Object.
  - showErrorMessage
```
void showErrorMessage(java.lang.String msg)
```
    Displays the error message.
    
    Parameters:
    
    msg - The error msg to be displayed
  - readLine
```
java.lang.String readLine()
```
    Reads and returns a line of input, without including the end-of-line characters that terminate the input.
    
    Returns:
    
    The next line of input as a String
  - readLine
```
java.lang.String readLine(java.lang.String prompt)
```
    Prompts the user to enter a line of text, which is then returned as the value of this method. The end-of-line characters that terminate the input are not included in the returned string.
    
    Parameters:
    
    prompt - The prompt string to display to the user
    
    Returns:
    
    The next line of input as a String
  - readInt
```
int readInt()
```
    Reads and returns an integer value from the user.
    
    Returns:
    
    The value of the input interpreted as a decimal integer
  - readInt
```
int readInt(int low,
            int high)
```
    Reads and returns an integer value from the user, which is constrained to be within the specified inclusive range.
    
    Parameters:
    
    low - The lowest value in the permitted range
    
    high - The highest value in the permitted range
    
    Returns:
    
    The value of the input interpreted as a decimal integer
  - readInt
```
int readInt(java.lang.String prompt)
```
    Prompts the user to enter an integer, which is then returned as the value of this method.
    
    Parameters:
    
    prompt - The prompt string to display to the user
    
    Returns:
    
    The value of the input interpreted as a decimal integer
  - readInt
```
int readInt(java.lang.String prompt,
            int low,
            int high)
```
    Prompts the user to enter an integer, which is then returned as the value of this method. The value must be within the inclusive range between low and high.
    
    Parameters:
    
    prompt - The prompt string to display to the user
    
    low - The lowest value in the permitted range
    
    high - The highest value in the permitted range
    
    Returns:
    
    The value of the input interpreted as a decimal integer
  - readDouble
```
double readDouble()
```
    Reads and returns a double-precision value from the user.
    
    Returns:
    
    The value of the input interpreted as a double
  - readDouble
```
double readDouble(double low,
                  double high)
```
    Reads and returns a double-precision value from the user, which is constrained to be within the specified inclusive range.
    
    Parameters:
    
    low - The lowest value in the permitted range
    
    high - The highest value in the permitted range
    
    Returns:
    
    The value of the input interpreted as a double
  - readDouble
```
double readDouble(java.lang.String prompt)
```
    Prompts the user to enter an double-precision number, which is then returned as the value of this method.
    
    Parameters:
    
    prompt - The prompt string to display to the user
    
    Returns:
    
    The value of the input interpreted as a double
  - readDouble
```
double readDouble(java.lang.String prompt,
                  double low,
                  double high)
```
    Prompts the user to enter an double-precision number, which is then returned as the value of this method. The value must be within the inclusive range between low and high.
    
    Parameters:
    
    prompt - The prompt string to display to the user
    
    low - The lowest value in the permitted range
    
    high - The highest value in the permitted range
    
    Returns:
    
    The value of the input interpreted as a double
  - readBoolean
```
boolean readBoolean()
```
    Reads and returns a boolean value from the user, which must match either true or false, ignoring case.
    
    Returns:
    
    The value of the input interpreted as a boolean value
  - readBoolean
```
boolean readBoolean(java.lang.String prompt)
```
    Prompts the user to enter a boolean value, which is then returned as the value of this method.
    
    Parameters:
    
    prompt - The prompt string to display to the user
    
    Returns:
    
    The value of the input interpreted as a boolean value
  - readBoolean
```
boolean readBoolean(java.lang.String prompt,
                    java.lang.String trueLabel,
                    java.lang.String falseLabel)
```
    Prompts the user to enter a value, which is interpreted as a boolean value by matching it against the trueLabel and falseLabel parameters.
    
    Parameters:
    
    prompt - The prompt string to display to the user
    
    trueLabel - The string used to indicate true
    
    falseLabel - The string used to indicate false
    
    Returns:
    
    The value of the input interpreted as a boolean value

Interface IOModel

Method Summary

Method Detail

print

print

print

print

print

print

print

print

println

println

println

println

println

println

println

println

println

showErrorMessage

readLine

readLine

readInt

readInt

readInt

readInt

readDouble

readDouble

readDouble

readDouble

readBoolean

readBoolean

readBoolean