Move undecorated JFrame

int xMouse;
int yMouse;

private void formMousePressed(java.awt.event.MouseEvent evt) {

    xMouse  = evt.getX();
    yMouse = evt.getY();

}

private void formMouseDragged(java.awt.event.MouseEvent evt) {

    int x = evt.getXOnScreen();
    int y = evt.getYOnScreen();

    this.setLocation(x - xMouse, y - yMouse);

}

//*************************************************
//*Made by DovgaNik in 2020                       *
//*Create event mousePressed for frame in your IDE*
//*Create event mouseDragged for frame in your IDE*
//*************************************************

//My github
//https://github.com/DovgaNik
//https://gist.github.com/DovgaNik/37aed36f67f3210bb431056169a1b53d