freegraph
Class ExpressionItem.BiOperator

java.lang.Object
  |
  +--freegraph.ExpressionItem
        |
        +--freegraph.ExpressionItem.BiOperator

Enclosing class:

ExpressionItem

public static class ExpressionItem.BiOperator

extends ExpressionItem

A BiOperator is an ExpressionItem used to hold a all binary operators. (Operators with two operands.) The doOperation() method is used by the ExpressionEvaluator, and the getOrderOfOperationsLevel() method is used by ExpressionStack.

Nested Class Summary

Nested classes inherited from class freegraph.ExpressionItem

ExpressionItem.BiOperator, ExpressionItem.Number, ExpressionItem.Parenthesis, ExpressionItem.UnOperator, ExpressionItem.Variable

Field Summary

static int	ADD
static int	DIV
static int	MULT
static java.lang.String[]	OPERATORS
static int	POW
static int	ROOT
static int	SUBTR

Constructor Summary

ExpressionItem.BiOperator(int kind)

Method Summary

int	getAction(ExpressionItem exprItem) If exprItem is null or Parenthesis or if exprItem is a BiOperator with order of operations less than this, this item is moved to the hold stack.
java.lang.String	toString()

Methods inherited from class java.lang.Object

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

Field Detail

ADD

public static final int ADD

See Also:

Constant Field Values

SUBTR

public static final int SUBTR

See Also:

Constant Field Values

MULT

public static final int MULT

See Also:

Constant Field Values

DIV

public static final int DIV

See Also:

Constant Field Values

POW

public static final int POW

See Also:

Constant Field Values

ROOT

public static final int ROOT

See Also:

Constant Field Values

OPERATORS

public static final java.lang.String[] OPERATORS

Constructor Detail

ExpressionItem.BiOperator

public ExpressionItem.BiOperator(int kind)

Method Detail

getAction

public int getAction(ExpressionItem exprItem)

If exprItem is null or Parenthesis or if exprItem is a BiOperator with order of operations less than this, this item is moved to the hold stack. If exprItem is an UnOperator or a BiOperator with order of operation greater than or equal to this, the item on the hold stack is moved to the RPN stack.

Specified by:

getAction in class ExpressionItem

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object