Classe SETTE NANI:

package settenani;
   
public class ContaINani1 extends Thread{
    public void run(){
    setName("settenani");
    System.out.println(Thread.currentThread().getName());
    for(int i=0; i < 7; i++){
    System.out.println((i + 1)+" ");
        }
    
    }  
  }

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Main SETTE NANI:

package settenani;


public class ProvaNani {

    public static void main(String[] args) {
        ContaINani1 thr1 = new ContaINani1();
        thr1.start();
        System.out.println(Thread.currentThread().getName());
    }
    
}