下面是两个类,一个类扩展了JComponent,需要重写paintComponent方法。另一个类扩展了JPanel,也需要重写paintComponent方法。为什么DrawingPanel类(扩展JPanel)需要调用super.paintComponent(g)方法,而CollageComponent (扩展JComponent)不需要调用super.paintComponentpublic class CollageComponent extends JComponent {
public void <e
到目前为止,我还没有使用paint()函数或覆盖paintComponent()。因此,我尝试在JPanel中覆盖paintComponent()方法,并尝试从NewJApplet调用paintComponent方法,但它没有使用垂直线更新timeLinePanel1。public void run() { timeLinePanel1.paintComponent*/
public Tim