Question

我尝试在java上将字符串转换为日期。我阅读并尝试了这个网站"Java Date and Calendar examples"的例子，但我仍然无法编译和运行它。

这是我的代码。

package javaapplication5;

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

public class JavaApplication5 {   

    public static void main(String[] args) {
        SimpleDateFormat sdf = new SimpleDateFormat("dd-M-yyyy hh:mm:ss");
        String dateInString = "31-08-1982 10:20:56";
        Date date = sdf.parse(dateInString);
        System.out.println(date);
    }

}

我收到了这个错误。

Exception in thread "main" java.lang.RuntimeException: Uncompilable source code - unreported exception java.text.ParseException; must be caught or declared to be thrown

我错过了什么或做错了什么？谢谢你的帮助。

Answer 1

问题是java.text.ParseException是checked exception

已检查的异常是一种异常，必须在抛出它的方法中捕获或声明

所以......你可以在throws列表

中声明它

public static void main(String[] args) throws ParseException {
    /* ... */
}

或者应该妥善处理它

public static void main(String[] args) {
    try {
        Date date = sdf.parse(dateInString);
    } catch (ParseException e) {
        // do proper thing here like try another
        // format or log/rethrow/wrap exception
    }
}

Answer 2

只需在try catch块中添加代码即可。

try {
 //parse code
}
catch (ParseException e) {
 //handling exceptions
}

Answer 3

尝试将所有代码放入try / catch块

try{
     // your code here.
 }catch(Exception e){
     e.printStackTrace();
 }

Answer 4

像这样添加try-catch块：

try
{
    //...Code.... Mainly below:
    Date date = sdf.parse(dateInString);
} catch (ParseException e) 
  //Or any superclass, such as RuntimeException, 
  //although use superclass ONLY to be generic, not otherwise, such as 
  //if you want to handle all exceptions the same way.
{
    //...Handler Code...
}

Answer 5

  SimpleDateFormat sdf = new SimpleDateFormat("dd-M-yyyy hh:mm:ss");
            String dateInString = "31-08-1982 10:20:56";
            Date date = null;
            try {
                date = sdf.parse(dateInString);
            } catch (ParseException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
            System.out.println(date);

Java：错误解析日期的字符串到日期对象

5 个答案: