kto mi wyjasni co znaczy ponizszy kod??
```cpp
public Dimension getPreferredSize(JComponent c) { //
FontMetrics metrics = Toolkit.getDefaultToolkit().getFontMetrics(
c.getFont());
String tipText = ((JToolTip) c).getTipText();
if (tipText == null) {
tipText = "";
}
BufferedReader br = new BufferedReader(new StringReader(tipText));
String line;
int maxWidth = 0;
Vector v = new Vector();
try {
while ((line = br.readLine()) != null) {
int width = SwingUtilities.computeStringWidth(metrics, line);
maxWidth = (maxWidth < width) ? width : maxWidth;
v.addElement(line);
}
} catch (IOException ex) {
ex.printStackTrace();
}
int lines = v.size();
if (lines < 1) {
strs = null;
lines = 1;
} else {
strs = new String[lines];
int i = 0;
for (Enumeration e = v.elements(); e.hasMoreElements(); i++) {
strs[i] = (String) e.nextElement();
}
}
int height = metrics.getHeight() * lines;
this.maxWidth = maxWidth;
return new Dimension(maxWidth + 6, height + 4);
}
}