与collections.sort绑定不匹配(Bound Mismatch with collections.sort)

 我有一个具有sqlite DB的应用程序，其内容被放入arraylist并可通过列表视图查看。 我的问题是我无法按字母顺序获取该项目。 我已经实现了Collections.sort()但是收到了Bound Mismatch错误。 有任何想法吗 
 
 错误： 
 
 绑定不匹配：类型Collections的泛型方法sort(List<T>)不适用于参数(ArrayList<LoginDetails>) 。 推断类型LoginDetails不是有界参数的有效替代<T extends Comparable<? super T>> <T extends Comparable<? super T>> 
 
private ListView loginList;
private Button webLogin;
private ListAdapter loginListAdapter;
private ArrayList<LoginDetails> loginArrayList;

    public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.login_listview);


    loginList = (ListView)
    findViewById(R.id.loginlist);
    loginList.setOnItemClickListener(this);

    webLogin = (Button)
    findViewById(R.id.button3);
    webLogin.setOnClickListener(this);

    loginArrayList = new ArrayList<LoginDetails>();
    loginListAdapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, populateList());
    loginList.setAdapter(loginListAdapter);

    Collections.sort(loginArrayList ); //Bound mismatch error is here.
    }
 
 登录详细信息： 
 
public class LoginDetails {

private String sName;
private String wUrl;
private String uName;
private String pWord;

public String getsName() {
return sName;
}
public void setsName(String sName) {
this.sName = sName;
}

public String getwUrl() {
return wUrl;
}
public void setwUrl(String wUrl) {
this.wUrl = wUrl;
}

public String getuName() {
return uName;
}
public void setuName(String uName) {
this.uName = uName;
}
public String getpWord() {
return pWord;
}
public void setpWord(String pWord) {
this.pWord = pWord;
}

}

I have a application that has a sqlite DB whos content is put into an arraylist and viewable through a list view. My issue is that I am unable to get the item in alphabetical order. I have implemented Collections.sort() but receive a Bound Mismatch error. any ideas
 
Error:
 
Bound mismatch: The generic method sort(List<T>) of type Collections is not applicable for the arguments (ArrayList<LoginDetails>). The inferred type LoginDetails is not a valid substitute for the bounded parameter <T extends Comparable<? super T>>
 
private ListView loginList;
private Button webLogin;
private ListAdapter loginListAdapter;
private ArrayList<LoginDetails> loginArrayList;

    public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.login_listview);


    loginList = (ListView)
    findViewById(R.id.loginlist);
    loginList.setOnItemClickListener(this);

    webLogin = (Button)
    findViewById(R.id.button3);
    webLogin.setOnClickListener(this);

    loginArrayList = new ArrayList<LoginDetails>();
    loginListAdapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, populateList());
    loginList.setAdapter(loginListAdapter);

    Collections.sort(loginArrayList ); //Bound mismatch error is here.
    }
 
LoginDetails:
 
public class LoginDetails {

private String sName;
private String wUrl;
private String uName;
private String pWord;

public String getsName() {
return sName;
}
public void setsName(String sName) {
this.sName = sName;
}

public String getwUrl() {
return wUrl;
}
public void setwUrl(String wUrl) {
this.wUrl = wUrl;
}

public String getuName() {
return uName;
}
public void setuName(String uName) {
this.uName = uName;
}
public String getpWord() {
return pWord;
}
public void setpWord(String pWord) {
this.pWord = pWord;
}

}

原文：https://stackoverflow.com/questions/11651120