public void initMusicModeControl() {
but_music.addMouseListener(new MouseAdapter() {
MyMenu popup_menuList = new MyMenu("播放曲目");
public void mouseClicked(MouseEvent e) {
int mod = e.getModifiers() & 4;
if (e.getButton() == MouseEvent.BUTTON1
&& e.getClickCount() == 2) {
int index = list.getSelectedIndex();
if (but_music.getActionCommand() == "true") {
changToMusicMode();
} else {
changToMoveMode(index);
}
} else if (mod != 0) {
System.out.println("Ok");
popup_menu.add(popup_menuList);
popup_menu.show(but_music, e.getX(), e.getY());
popupList.setSelectedIndex(list.getSelectedIndex());
popup_menuList.add(popupList);
}
}
});
}
上面代码中int mod = e.getModifiers() & 4的作用是什么，什么意思啊;
getModifiers()返回此类或接口以整数编码的 Java 语言修饰符是什么意思啊？
就是前面的修饰符，像public static之类的，只不过所有的修饰符都是不冲突的数字，这样一个数字就能代表多个修饰符，例如public 是 00000001而static 是 00000010，那么合在一起就是00000011 就代表public static了
具体的含义，请参见Modifier这个类
这段代码中mod = e.getModifiers()&4的意思及作用是什么呢
这个在Modifier类里面有定义的
Java code
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