6 ways to iterate Java ArrayLists

joeyajames · joeyajames · commit ce4d5de5f719 · 2015-12-21T09:01:45.000-08:00
diff --git a/MyIterator.java b/MyIterator.java
@@ -0,0 +1,60 @@
+import java.util.ArrayList;
+import java.util.Iterator;
+import java.util.ListIterator;
+
+public class MyIterator {
+		
+	public static void main(String[] args) {
+		ArrayList<String> cars = new ArrayList<>();
+		cars.add("Chevy");
+		cars.add("Ford");
+		cars.add("Honda");
+		cars.add("Mercedes");
+		cars.add("Toyota");
+		
+		// for loop
+		System.out.println("For Loop:");
+		for (int i = 0; i < cars.size(); i++) {
+			System.out.print(cars.get(i) + " ");
+		}
+		
+		// advanced for loop
+		System.out.println("\n\nAdvanced For Loop:");
+		for (String car : cars) {
+			System.out.print(car + " ");
+		}
+		
+		// while loop
+		System.out.println("\n\nWhile Loop:");
+		int i = 0;
+		while (i < cars.size()) {
+			System.out.print(cars.get(i++) + " ");
+		}
+		
+		// Iterator (supports hasNext, next, remove)
+		System.out.println("\n\nIterator:");
+		Iterator<String> iterator = cars.iterator();
+		while (iterator.hasNext()) {
+			System.out.print(iterator.next() + " ");
+		}
+		
+		// ListIterator (supports hasNext, next, remove, hasPrevious, previous, add)
+		System.out.println("\n\nListIterator:");
+		ListIterator<String> li = cars.listIterator();
+		while (li.hasNext()) {
+			System.out.print(li.next() + " ");
+		}
+		
+		// Java 8 Stream
+		System.out.println("\n\nJava 8 Stream:");
+		cars.forEach((car) -> {
+			System.out.print(car + " ");
+		});
+	}
+}
+
+
+
+
+
+
