Class NotExpression

java.lang.Object

ConditionalExpression

NotExpression

public class NotExpression
extends ConditionalExpression

A class that represents a conditional expression involving a NOT operator. A NotExpression involves one conditional subexpression, and it is true when the subexpression is false, and false when the subexpression is true.

Constructor Summary

Constructors

Constructor and Description
NotExpression(ConditionalExpression expr) Constructs a NotExpression object that represents the conditional expression NOT expr.

Method Summary

Modifier and Type	Method and Description
boolean	isTrue() Evaluates the expression represented by the called object, based on the current truth value of the subexpression.

Methods inherited from class ConditionalExpression

getLeft, getRight

Methods inherited from class java.lang.Object

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

Constructor Detail

NotExpression

public NotExpression(ConditionalExpression expr)

Constructs a NotExpression object that represents the conditional expression NOT expr.

Parameters:

expr - the conditional subexpression being negated

Method Detail

isTrue

public boolean isTrue()

Evaluates the expression represented by the called object, based on the current truth value of the subexpression.

Specified by:

isTrue in class ConditionalExpression

Returns:

true if the subexpression is false, and false if the subexpression is true