问题描述
我的目标是从ArrayList创建MenuItem,然后向每个menuitem添加一个事件,该事件在arraylist中搜索选定的menuitem,以便可以将其转移到下一个场景。菜单项将在菜单按钮内。
MenuButton selectAccount = new MenuButton("Select an Account");
selectAccount.setMaxWidth(Double.MAX_VALUE);
for (int i = 0; i < accountList.size(); i++) {
//add the items. accountList is my arraylist
selectAccount.getItems().add(new MenuItem(accountList.get(i).getName()));
//add the event to items.
selectAccount.getItems().get(i).setOnAction((ActionEvent e)->{
// need to grab the text that is inside the menuitem here
// will run loop to compare text with names in my accountList arraylist
// if name matches,then the object from arraylist will be loaded into next scene
});
}
我遇到的麻烦是弄清楚如何从菜单项中提取文本。如何引用这些匿名菜单项的文本?
解决方法
假设accountList
中元素的类型是类Account
(如果没有,则相应地进行更改),如果您使用常规列表迭代(而不是基于索引的for循环),这一切自然完美地完成了:
MenuButton selectAccount = new MenuButton("Select an Account");
selectAccount.setMaxWidth(Double.MAX_VALUE);
for (Account account : accountList) {
MenuItem item = new MenuItem(account.getName());
selectAccount.getItems().add(item);
item.setOnAction((ActionEvent e)->{
// now just do whatever you need to do with account,e.g.
showAccountDetails(account);
});
}