Thread t=new Thread(new Runnable(){
public void run(){
long i = 0;
while(true){
i++;
Label1.setText("1er label mostrado en la ocacion " + i);
try {
Thread .sleep(5000);
} catch (InterruptedException ex) {
ex.printStackTrace();
}
Label2.setText("2do label mostrado en la ocacion" + i);
}
}
);
t.start();