Answer / Bhupendra Kumar Singh

To use ArrayList in NetBeans, you first need to import it. You can do this by adding the following line at the top of your Java file:

```java
import java.util.*;

After that, you can create an ArrayList object and add elements as shown below:

ArrayList<String> list = new ArrayList<String>();
list.add("Element1");
list.add("Element2");
...
```

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