Feedback Needed on My First Java Password Tool

Hey everyone! I'm a freshman in college taking my first Java programming class, and I'm about halfway through the course. To reinforce what I've learned, I've been working on some personal projects. My latest one is a password tool that checks if a password meets certain criteria for validity and rates its strength. I'm also planning to add a feature that generates secure passwords soon.

I'm keen to hear your thoughts! What improvements or enhancements do you think I could make, especially since I'll be learning JavaFX next? Also, can you suggest any other beginner-friendly projects similar to this? Thanks in advance for any feedback!

Here's a snippet of my code:

```java
import java.util.Scanner;
public class PasswordTool {
public static void main(String[] args) {
// Create a scanner
Scanner input = new Scanner(System.in);
boolean valid = false;
while (!valid) {
valid = true;
int score = 0;
String message = "";
// Input from user
System.out.print("Enter a password: ");
String password = input.nextLine();
// Check length, complexity, etc.
}
}
// Validation methods...
}
```