Java Reference
In-Depth Information
5.4.2 Predicate Methods
A predicate method is a method that returns a
boolean
value. Here is an example
of a predicate method:
A predicate method returns a
boolean
value.
public class BankAccount
{
public boolean isOverdrawn()
{
return balance > 0;
}
}
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You can use the return value of the method as the condition of an
if
statement:
if (harrysChecking.isOverdrawn()) . . .
There are several useful static predicate methods in the
Character
class:
isDigit
isLetter
isUpperCase
isLowerCase
