Draw JInternalFrame borders by rectangles for floating point UI scale

Drawing rectangles using clip and lines can lead that some borders are not drawn for floating point UI scale. See the attached screenshot:
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        g.scale(1.5, 1.5);
        g.setColor(Color.ORANGE);
        drawRect(g, 7, 5, 25, 20);
        drawRect(g, 35, 5, 24, 21);

    private static void drawRect(Graphics2D g, int x, int y, int w, int h) {

        g.setClip(x, y, w, h);
        g.drawLine(x, y, x + w, y);
        g.drawLine(x, y + h, x + w, y + h);
        g.drawLine(x, y, x, y + h);
        g.drawLine(x + w, y, x + w, y + h);

    }
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The JInternalFrame borders should be drawn by rectangles.