Class ImmutableList.Builder<E>

java.lang.Object

com.google.common.collect.ImmutableCollection.Builder<E>

com.google.common.collect.ImmutableList.Builder<E>

Enclosing class:

ImmutableList<E>

public static final class ImmutableList.Builder<E>
extends ImmutableCollection.Builder<E>

A builder for creating immutable list instances, especially public static final lists ("constant lists"). Example:

public static final ImmutableList<Color> GOOGLE_COLORS =
    new ImmutableList.Builder<Color>()
        .addAll(WEBSAFE_COLORS)
        .add(new Color(0, 191, 255))
        .build();

Elements appear in the resulting list in the same order they were added to the builder.

Builder instances can be reused; it is safe to call build() multiple times to build multiple lists in series. Each new list contains all the elements of the ones created before it.

Since:

2.0

Author:

Kevin Bourrillion

Constructor Summary

Constructors

Constructor	Description
Builder()	Creates a new builder.

Method Summary

Modifier and Type	Method	Description
ImmutableList.Builder<E>	add(E element)	Adds element to the ImmutableList.
ImmutableList.Builder<E>	add(E... elements)	Adds each element of elements to the ImmutableList.
ImmutableList.Builder<E>	addAll(Iterable<? extends E> elements)	Adds each element of elements to the ImmutableList.
ImmutableList.Builder<E>	addAll(Iterator<? extends E> elements)	Adds each element of elements to the ImmutableList.
ImmutableList<E>	build()	Returns a newly-created ImmutableList based on the contents of the Builder.

Methods inherited from class java.lang.Object

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

Constructor Details

Builder

public Builder()

Creates a new builder. The returned builder is equivalent to the builder generated by ImmutableList.builder().

Method Details

add

@CanIgnoreReturnValue
public ImmutableList.Builder<E> add(E element)

Adds element to the ImmutableList.

Parameters:

element - the element to add

Returns:

this Builder object

Throws:

NullPointerException - if element is null

add

@CanIgnoreReturnValue
public ImmutableList.Builder<E> add(E... elements)

Adds each element of elements to the ImmutableList.

Parameters:

elements - the Iterable to add to the ImmutableList

Returns:

this Builder object

Throws:

NullPointerException - if elements is null or contains a null element

addAll

@CanIgnoreReturnValue
public ImmutableList.Builder<E> addAll(Iterable<? extends E> elements)

Adds each element of elements to the ImmutableList.

Parameters:

elements - the Iterable to add to the ImmutableList

Returns:

this Builder object

Throws:

NullPointerException - if elements is null or contains a null element

addAll

@CanIgnoreReturnValue
public ImmutableList.Builder<E> addAll(Iterator<? extends E> elements)

Adds each element of elements to the ImmutableList.

Overrides:

addAll in class ImmutableCollection.Builder<E>

Parameters:

elements - the Iterator to add to the ImmutableList

Returns:

this Builder object

Throws:

NullPointerException - if elements is null or contains a null element

build

public ImmutableList<E> build()

Returns a newly-created ImmutableList based on the contents of the Builder.

Specified by:

build in class ImmutableCollection.Builder<E>