Question: Is it possible that adding more import statements to your java code could slow down the time it takes to load your classes into the JVM?

Answer: 
No, imports are only used in compilation to find class references. Add unused imports and they don't do anything. To put it another way:

```
import java.util.*;

```

simply means you can write:

```
Map map = new HashMap();

```

instead of:

```
java.util.Map map = new java.util.HashMap();

```

That's all it does.
Imports can have an effect on *compilation* time, but not on loading time or running time. Basically, if you import classes that you don't need (typically by using wildcard imports when explicit imports would do), then you can slow the compiler a bit.

However, even that effect is generally trivial unless you are compiling a huge system.