按字母顺序对列表中的名称进行排序？

Question

你能帮我按字母顺序排序一个清单吗？

我的代码

emailList.add(contact.getUserName());                               
String[] emails = new String[emailList.size()];
emailList.toArray(emails);
namesList.add(name);

Collections.sort(emailList, new Comparator() {
    public int compare(Object o1, Object o2) {
        String name1 = (String) o1;
        String name2 = (String) o2;
        return name1.compareToIgnoreCase(name2);
    }
});

System.out.println("namesList.toString() = " + namesList.toString());

Answer 1

您不需要创建新的比较器.打电话吧Collections.sort(emailList);.

更新:

Collections.sort(emailList, new Comparator<String>()
{
    @Override
    public int compare(String text1, String text2)
    {
        return text1.compareToIgnoreCase(text2);
    }
});