I tried making a Java program executing the Fibonacci sequence.

Here's my code:

```
import java.io.*;
public class Fibonacci{
    public static void main(String[]args){
        BufferedReader Data=new BufferedReader (new InputStreamReader(System.in));
        int ctr1=0;
        int ctr2=0;
        int num1=0;
        int num2=0;
        int num3=0;
        try{
            System.out.println("How many numbers would you want to see?");
            ctr2=Integer.parseInt(Data.readLine());
            for(int ans=0; ctr1==ctr2; ctr1++){
            num1++;
            System.out.println(num2 + "\n" + num1);
            ans=num1+num2;
            System.out.println(ans);
            ans=num3;
            }
        }catch(IOException err){
            System.out.println("Error!" + err);
        }catch(NumberFormatException err){
            System.out.println("Invald Input!");
        }
    }
}

```

Obviously, I'm a beginner in Java and I don't know how to properly use the for statement. Would somebody be kind enough to make my code work? Or maybe make a way shorter code that works. I'm a beginner so be cool. Thanks :)