de.nidanet.dev.math.calculator
Class Logic

java.lang.Object
  java.util.Observable
      de.nidanet.dev.math.calculator.Logic

public class Logic
extends Observable

The MODEL of the calculator.

Since:

2009-07-30

Version:

0.9

Author:

Nico Danneberg

Field Summary

static char	ADD
private boolean	comma
private char	CurOp
private BigDecimal	CurRes
static char	DIV
private char[]	InputLine
static char	MIN
static char	MUL
static char	NaN

Constructor Summary

Logic()

Method Summary

void	append(char c)
private void	calc()
void	doCalculation()
void	doOperation(char op)
String	getDisplayLine()
boolean	isCommaUsed()

Methods inherited from class java.util.Observable

addObserver, clearChanged, countObservers, deleteObserver, deleteObservers, hasChanged, notifyObservers, notifyObservers, setChanged

Methods inherited from class java.lang.Object

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

Field Detail

NaN

public static final char NaN

See Also:

Constant Field Values

ADD

public static final char ADD

See Also:

Constant Field Values

MIN

public static final char MIN

See Also:

Constant Field Values

MUL

public static final char MUL

See Also:

Constant Field Values

DIV

public static final char DIV

See Also:

Constant Field Values

CurOp

private char CurOp

CurRes

private BigDecimal CurRes

InputLine

private char[] InputLine

comma

private boolean comma

Constructor Detail

Logic

public Logic()

Method Detail

append

public void append(char c)

doOperation

public void doOperation(char op)

doCalculation

public void doCalculation()

getDisplayLine

public String getDisplayLine()

isCommaUsed

public boolean isCommaUsed()

calc

private void calc()