将字符串转换为java.util.date

Question

我正在尝试在java.util.date中转换字符串，但我遇到以下错误：

 HelloWorld.java:10: error: incompatible types: Date cannot be converted to    String                                                                                                                                                                       
        return FORMATTER.parse(date);                                                                                                                                                                                                               
                              ^                                                                                                                                                                                                                     
 HelloWorld.java:16: error: incompatible types: String cannot be converted to Date                                                                                                                                                                       
    Date date = convertStringToDate("2015-08-03 09:19:00.000");    

我的代码如下：

import java.text.SimpleDateFormat;
import java.util.Date;

public class HelloWorld{

private static final SimpleDateFormat FORMATTER = new SimpleDateFormat("yyyy-MM-dd hh:mm:ss");

 public static String convertStringToDate(String date) {
    if(date!=null){
        return FORMATTER.parse(date);
    }
    return null;
}

 public static void main(String []args){
    Date date = convertStringToDate("2015-08-03 09:19:00.000");
    System.out.println(date);
 }
}