From 948c470d83aa20bda46f42c1de0a38ac980d43fb Mon Sep 17 00:00:00 2001
From: acp059 <eva.meinen@haw-hamburg.de>
Date: Tue, 12 May 2020 17:00:55 +0200
Subject: [PATCH] Add iterator

---
 iterator.md | 40 +++++++++++++++++++++++++++++++++++++++-
 1 file changed, 39 insertions(+), 1 deletion(-)

diff --git a/iterator.md b/iterator.md
index 6cc14af..42ff525 100644
--- a/iterator.md
+++ b/iterator.md
@@ -6,4 +6,42 @@ header: Programmieren 1 **Tutorium**
 footer: Henri Burau und Eva Meinen
 -->
 
-# Iterator
+# Interface Iterable
+
+zum Iterieren über eine Collection
+
+```java
+interface Iterable<T>{
+	Iterator<T> iterator();
+}
+```
+
+liefert Iterator über Elemente
+
+```java
+interface Iterator<T>{
+	boolean hasNext();
+	T next();
+	void remove();
+}
+```
+
+---
+
+Anwendung:
+
+```java
+Iterator<Adress> iterator = adresses.iterator();
+while( iterator.hasNext() ){
+	Adress ad = iterator.next();
+	System.out.printf("%s", ad.toString());
+} 
+```
+
+alternativ:
+
+```java
+for(Adress ad : adresses) {
+	System.out.printf("%s", ad.toString());
+}
+```