Difference between revisions of "Iterable Immutable List Assignment"

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Line 27: Line 27:
  
 
=Example=
 
=Example=
{{Example|ListsExample|immutable.list.example}}
+
{{Example|Mary Berry|immutable.list.example}}
  
 
The code:
 
The code:
 
  <nowiki>ImmutableList<Integer> numbers = Lists.brackets(4, 66, 99);
 
  <nowiki>ImmutableList<Integer> numbers = Lists.brackets(4, 66, 99);
for (int i : numbers) {
+
for (Integer i : numbers) {
 
System.out.println(i);
 
System.out.println(i);
 
}</nowiki>
 
}</nowiki>

Revision as of 16:51, 24 April 2020

Studio To Revisit

In this studio we will complete the DefaultImmutableList implementation from the ImmutableList studio.

ImmutableList

The ImmutableList interface extends Iterable which has one method: iterator().

public interface ImmutableList<E> extends Iterable<E> {
	E head();
	ImmutableList<E> tail();
	boolean isEmpty();
}

Iterable

interface java.lang.Iterable<T>

  1. Iterator<T> iterator()

Iterator

interface java.util.Iterator<T>

  1. boolean hasNext()
  2. T next()

Code To Implement

DefaultImmutableList

class: DefaultImmutableList.java Java.png
methods: iterator
package: immutable.list.assignment
source folder: src/main/java

iterator

public Iterator<E> iterator()

Example

class: Mary Berry.java Presentation icon-72a7cf.svg
package: immutable.list.example
source folder: src/main/java

The code:

ImmutableList<Integer> numbers = Lists.brackets(4, 66, 99);
for (Integer i : numbers) {
	System.out.println(i);
}

produces:

4
66
99

Test

class: IterableAssignmentTestSuite.java Junit.png
package: immutable.list.assignment
source folder: src/test/java
class: ImmutableListIteratorMethodTestSuite.java Junit.png
package: immutable.list.assignment
source folder: src/test/java