Problems and solutions of converting date into specified string in date class

I'm learning Date Follow the exercise as you read the content , The result is always wrong , I think the code is right, duck , Is it because my bag is incorrect ,

Check the code again and again to make sure the code is ok , What's the problem ？ I fell into silence ……

Fortunately, with the blessing of my eyes, I finally found , above 11:20:00 Colon of English input method used , The following hours, minutes and seconds use the colon of the Chinese input method , Nature cannot match , Dates and patterns must be compared one by one

  After correcting it into English input method, it is compiled and run successfully  

sdf2.parse(ss);    Quick completion Ctrl+lt+v

//ParseException   Report errors , Parsing exceptions     Shortcut keys for solving   Alt+Enter, Default first 

Attach complete code ：

package com.com.object_11.APITest_01.Date;
// Toxic poison 
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;

/*SimpleDateFormat Class constructor 
public SimpleDateFormat()  Construct a SimpleDateFormat, Use default mode and date format 
public SimpleDateFormat(String pattern)  Construct a SimpleDateFormat Use the given pattern and default date format 

- SimpleDateFormat Common methods of class 
  -  format ( from Date To String)
    - public final String format(Date date)： Format the date as a date / Time string 
  -  analysis ( from String To Date)
    - public Date parse(String source)： Parse the text from the beginning of the given string to generate the date */
public class SimpleDateFormatDemo {
    public static void main(String[] args) throws ParseException {

//         format ( from Date To String)
        //         Parameterless construction creates objects 
        Date d = new Date();
        SimpleDateFormat sdf = new SimpleDateFormat();   // No arguments structure 
        // How to create    sdf.format(d); then Ctrl+Alt+v Automatic generation 
        String s = sdf.format(d);
        //         Output this string 
        System.out.println(s);
        //2022/6/29  In the morning 11:03   ( Default mode )
        System.out.println("-----------");

        // format ( from Date To String)
//         Parameterless construction creates objects 
        Date d1 = new Date();
//       SimpleDateFormat sdf = new SimpleDateFormat();
        //        Remove the nonparametric structure , Write it yourself 
        SimpleDateFormat sdf1 = new SimpleDateFormat("yyyy year MM month dd Japan  HH：mm：ss");  // Mm / DD / yyyy HHM / S 
// How to create    sdf.format(d1); then Ctrl+Alt+v Automatic generation 
        String s1 = sdf.format(d1);
//         Output this string 
        System.out.println(s1);
        //  ( Default mode )
        System.out.println("-----------");

//        ( from String To Date)
        String ss = "2025-06-29 11:20:00";
        //ParseException   Report errors , Parsing exceptions 
//      SimpleDateFormat sdf2 = new SimpleDateFormat("yyyy year MM month dd Japan  HH：mm：ss");
        SimpleDateFormat sdf2 = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        Date dd = sdf2.parse(ss);
        System.out.println(dd);
    }
}
//2022/6/30  Afternoon 5:00
//-----------
//2022/6/30  Afternoon 5:00
//-----------
//Sun Jun 29 11:20:00 CST 2025