Java - Thread - crear 3 threads y asignarle un random a cada uno y mostrar cuando termine

public class Main {
public static void main (String args[]){
TH t1= new TH(1);
TH t2= new TH(2);
TH t3= new TH(3);

t1.start();
t2.start();
t3.start();

}
}

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public class TH extends Thread{

private int n;

public void run(){

try{

Thread.sleep((long)(Math.random()*5)*1000);

}catch(Exception e ){}

System.out.println("Termino: "+n);

}

public TH(int n){

this.n = n;

}

}

Salida por consola:

Termino: 1

Termino: 2

Termino: 3

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Termino: 2

Termino: 1

Termino: 3

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Termino: 1

Termino: 3

Termino: 2