### Question:
ST_Box extends STBase implements Cloneable { @Override public String toString() { return fmt(topLeftX) + " " + fmt(topLeftY) + " " + fmt(width) + " " + fmt(height); } ST_Box(double topLeftX, double topLeftY, double width, double height);  ST_Box(Serializable... arr); static ST_Box getInstance(String arrStr); Double getTopLeftX(); ST_Box setTopLeftX(Double topLeftX); Double getTopLeftY(); ST_Box setTopLeftY(Double topLeftY); Double getWidth(); ST_Box setWidth(Double width); Double getHeight(); ST_Box setHeight(Double height); ST_Pos getTopLeftPos(); @Override String toString(); @Override ST_Box clone();  }### Answer:
@Test public void con() throws Exception { ST_Box box = new ST_Box(0, 0, 255, 255); assertTrue("0 0 255 255".equals(box.toString())); }