potableWaterButton.setToolTipText(numFormat.format(myPotableWaterStore .getCurrentLevel()) + " L"); dirtyWaterButton.setToolTipText(numFormat.format(myDirtyWaterStore .getCurrentLevel()) + " L"); greyWaterButton.setToolTipText(numFormat.format(myGreyWaterStore .getCurrentLevel()) + " L");
    public void refresh() {        potableWaterButton.setToolTipText(numFormat.format(myPotableWaterStore                .getCurrentLevel())                + " L");        dirtyWaterButton.setToolTipText(numFormat.format(myDirtyWaterStore                .getCurrentLevel())                + " L");        greyWaterButton.setToolTipText(numFormat.format(myGreyWaterStore                .getCurrentLevel())                + " L");    }