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Class calculator.CalculatorState 

java.lang.Object
   |
   +----calculator.CalculatorState
public class CalculatorState
extends Object
This class provides the main functionality for a basic four-function calculator. Adapted from the earlier ButtonHandler

Copyright (c) 1999 Massachusetts Institute of Technology

See Also:
Calculator

Variable Index

o operation
o previousNumber
o readyForNewNumber
o seenDecimal

Constructor Index

o CalculatorState(Calculator)

Method Index

o clearScreen()
o doOperation(double)
o handleDecimal()
o handleEquals()
o handleNumKey(int)
o handleOperation(int)
o readScreen()
o resetCalc()
o resetDecimal()
o toString()
o writeScreen(double)
o writeScreen(int)
o writeScreen(String)

Variables

o seenDecimal 
 protected boolean seenDecimal
o readyForNewNumber 
 protected boolean readyForNewNumber
o previousNumber 
 protected double previousNumber
o operation 
 protected int operation

Constructors

o CalculatorState 
 protected CalculatorState(Calculator gui)

Methods

o toString 
 public String toString()
Overrides:
toString in class Object
o handleNumKey 
 protected void handleNumKey(int num)
o handleDecimal 
 protected void handleDecimal()
o handleOperation 
 protected void handleOperation(int op)
o handleEquals 
 protected void handleEquals()
o doOperation 
 protected double doOperation(double currentNumber)
o resetDecimal 
 protected void resetDecimal()
o clearScreen 
 protected void clearScreen()
o readScreen 
 protected String readScreen()
o writeScreen 
 protected void writeScreen(String s)
o writeScreen 
 protected void writeScreen(double d)
o writeScreen 
 protected void writeScreen(int i)
o resetCalc 
 protected void resetCalc()

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