> For the complete documentation index, see [llms.txt](https://bernardo.gitbook.io/development-docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://bernardo.gitbook.io/development-docs/java/creating-new-instances.md).

# Creating New Instances Dynamically

Sometimes the type of an object is decided at runtime.

In this example the model consists of a single interface, and no implementation. The user is expected to choose the actual implementation to use.

## Model

```java
public interface ModelObject {

   public String getName();

   public void setName(final String name);

}
```

## Component

```java
public interface ModelObjectBuilder<V extends ModelObject> {

   public V getModelObject(final String name);

}
```