Repository: java-sf-builder-simple-example

"Simplest java builder pattern" or "Resurrection of double braces initialization"

What is double brace initialization?

See what-is-double-brace-initialization-in-java and DoubleBraceInitialization.

Advantages:

1. Very simply to use.

Disadvantages:

1. Breaks "equals" compatibility.
2. No checks performed, when use direct assignments.
3. Possible memory leaks.

Can we avoid these troubles? Yes!

1. Make separate "Builder" class especially for double brace initialization.
2. Declare fields with default values.
3. Put object creation method in that class.

Advantages:

1. Simply to use.
2. Do not breaks "equals" compatibility.
3. You can perform checks in creation method.
4. No memory leaks.

Disadvantages:

None

And, as a result, we have simplest java builder pattern ever.

Samples:

All: java-sf-builder-simple-example

Simple class: MyClass.java

Inheritance: MyBaseClass.java, MyChildClass.java

Updated samples: replace passing of all parameters to pass only builder in class constructor.

New simple class: NewMyClass.java

New inheritance: NewBaseClass.java, NewChildClass.java

Related:

For most complicated java builder pattern see java-sf-builder-mega

Article: http://habrahabr.ru/post/261163/