private void jButton3ActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_jButton3ActionPerformed
        // TODO add your handling code here:
               
        loginthread logthread = new loginthread(); 
        logthread.IP = jTextField4.getText();        
        logthread.scan = false;
        logthread.start();
        
    }//GEN-LAST:event_jButton3ActionPerformed