Package nl.captcha

Class Captcha

java.lang.Object

nl.captcha.Captcha

All Implemented Interfaces:

Serializable

public final class Captcha
extends Object
implements Serializable

A builder for generating a CAPTCHA image/answer pair.

Example for generating a new CAPTCHA:

Captcha captcha = new Captcha.Builder(200, 50)
        .addText()
        .addBackground()
        .build();

Note that the build() must always be called last. Other methods are optional, and can sometimes be repeated. For example:

Captcha captcha = new Captcha.Builder(200, 50)
        .addText()
        .addNoise()
        .addNoise()
        .addNoise()
        .addBackground()
        .build();

Adding multiple backgrounds has no affect; the last background added will simply be the one that is eventually rendered.

To validate that answerStr is a correct answer to the CAPTCHA:

captcha.isCorrect(answerStr);

See Also:

• Serialized Form

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	Captcha.Builder

Field Summary

Fields

Modifier and Type	Field	Description
static final String	NAME

Method Summary

Modifier and Type	Method	Description
String	getAnswer()
BufferedImage	getImage()
boolean	isCorrect(String answer)
String	toString()

Methods inherited from class java.lang.Object

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

Field Details

NAME

public static final String NAME

See Also:

• Constant Field Values

Method Details

isCorrect

public boolean isCorrect(String answer)

getAnswer

public String getAnswer()

getImage

public BufferedImage getImage()

toString

public String toString()

Overrides:

toString in class Object