What is wrong with each of the following java code segments?

1. ArrayList values = new ArrayList();

2. ArrayList values = new ArrayList();

3. ArrayList values = new ArrayList();

4. ArrayList values = new ArrayList();

for (int I =1; I <=10; i++)

values.set( i-1, i*i );

5. ArrayList values;

for (int I =1; I <=10; i++)

{

values.add( i*i );

}