## Lecture 1 (11:00)

### Flexible-Size Collections

Do not need to specify a size when we create a collection.
Add as many items without concern for space.

### ArrayList
- Imported from java.util
- 
### ArrayList Methods
- get()
- remove()

## Lecture 2 (14:00)

### For Each Loop

```java
for( Animal animal : animalCollection )
{
	System.out.println(animal)
}
```

- The scope of `animal` is exclusively local to this loop body
- `animal` is of the type Animal
- For each element of type Animal in the `animalCollection` array list
- Not good for searches.

### While Loop

```java
public void showAllAnimals()
{
	int listPosition = 0;
	while( listPosition < 6 )
	{
		showAnimal( listPosition );
		listPosition++;
	}
}
```

### Sentinel

```java
public boolean findAnimal( String myPet ) {

	int listPosition = 0;
	boolean found = false;
	
	while( listPosition < animalCollection.size() && found == false ) {
	
		Animal animal = animalCollection.get( listPosition );
		String name = animal.getName();
		
		if( name.equals( myPet ) ) {
			found = true;
		}
		else {
			listPosition++;
		}
	}
	
	if( found == true ) {
		return true
	}
	else {
		return false
	}
}
```