Posted on 2008-10-10 09:30
林光炎 閱讀(2704)
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匿名類本身就是通過繼承類或者接口來實現的。但是不能再顯式的extends 或者implements了。
舉個例子：
JFrame frame = new JFrame();
我們為frame添加窗口事件可以采用如下兩種方式：
- Java code
-
frame.addWindowListener(new WindowListener() {
public void windowOpened(WindowEvent e) {
throw new UnsupportedOperationException("Not supported yet.");
}
public void windowClosing(WindowEvent e) {
throw new UnsupportedOperationException("Not supported yet.");
}
public void windowClosed(WindowEvent e) {
throw new UnsupportedOperationException("Not supported yet.");
}
public void windowIconified(WindowEvent e) {
throw new UnsupportedOperationException("Not supported yet.");
}
public void windowDeiconified(WindowEvent e) {
throw new UnsupportedOperationException("Not supported yet.");
}
public void windowActivated(WindowEvent e) {
throw new UnsupportedOperationException("Not supported yet.");
}
public void windowDeactivated(WindowEvent e) {
throw new UnsupportedOperationException("Not supported yet.");
}
});
這個匿名類就是實現了接口WindowListener
或者：
- Java code
-
frame.addWindowListener(new WindowAdapter() {});
上面這個匿名類就是繼承了ＷｉｎｄｏｗＡｄａｐｔｅｒ這個抽象類。