Check this may be helpful. Works fine for me. Code also covered daylight savings

    TimeZone tz = TimeZone.getTimeZone("Asia/Shanghai");
    Calendar cal = Calendar.getInstance();      
    // If needed in hours rather than milliseconds
    int LocalOffSethrs = (int) ((cal.getTimeZone().getRawOffset()) *(2.77777778 /10000000));        
    int ChinaOffSethrs = (int) ((tz.getRawOffset()) *(2.77777778 /10000000));       
    int dts = cal.getTimeZone().getDSTSavings();
    System.out.println("Local Time Zone : " + cal.getTimeZone().getDisplayName());
    System.out.println("Local Day Light Time Saving : " + dts);
    System.out.println("China Time : " + tz.getRawOffset());
    System.out.println("Local Offset Time from GMT: " + LocalOffSethrs);
    System.out.println("China Offset Time from GMT: " + ChinaOffSethrs);    
    // Adjust to GMT
    cal.add(Calendar.MILLISECOND,-(cal.getTimeZone().getRawOffset()));  
    // Adjust to Daylight Savings
    cal.add(Calendar.MILLISECOND, - cal.getTimeZone().getDSTSavings());
    // Adjust to Offset
    cal.add(Calendar.MILLISECOND, tz.getRawOffset());       
    Date dt = new Date(cal.getTimeInMillis());              
    System.out.println("After adjusting offset Acctual China Time :" + dt); 

java.time

The java.util Date-Time API and their formatting API, SimpleDateFormat are outdated and error-prone. It is recommended to stop using them completely and switch to the modern Date-Time API^*.

Also, quoted below is a notice from the home page of Joda-Time:

Note that from Java SE 8 onwards, users are asked to migrate to java.time (JSR-310) - a core part of the JDK which replaces this project.

Solution using java.time, the modern Date-Time API: If you want to get just date and time (and not the timezone information), you can use LocalDateTime.#now(ZoneId).

The non-parametrized overloaded, LocalDateTime.#now returns the current Date-Time using the JVM's timezone. It is equivalent to using LocalDateTime.now(ZoneId.systemDefault()).

Demo:

import java.time.LocalDateTime;
import java.time.ZoneId;

public class Main {
    public static void main(String[] args) {
        LocalDateTime now = LocalDateTime.now(ZoneId.of("Europe/Madrid"));
        System.out.println(now);
    }
}

Output from a sample run:

2021-07-25T15:54:31.574424

ONLINE DEMO

If you want to get the date and time along with the timezone information, you can use ZonedDateTime.#now(ZoneId). It's non-parametrized variant behave in the same manner as described above.

Demo:

import java.time.ZoneId;
import java.time.ZonedDateTime;

public class Main {
    public static void main(String[] args) {
        ZonedDateTime now = ZonedDateTime.now(ZoneId.of("Europe/Madrid"));
        System.out.println(now);
    }
}

Output from a sample run:

2021-07-25T16:08:54.741773+02:00[Europe/Madrid]

ONLINE DEMO

Learn more about the modern Date-Time API from Trail: Date Time.

^{* For any reason, if you have to stick to Java 6 or Java 7, you can use ThreeTen-Backport which backports most of the java.time functionality to Java 6 & 7. If you are working for an Android project and your Android API level is still not compliant with Java-8, check Java 8+ APIs available through desugaring and How to use ThreeTenABP in Android Project.}

You can try ZonedDateTime.now() . You can find it in package java.time

import java.time.ZonedDateTime;

public class Temp {
public static void main(String args[]) {
    System.out.println(ZonedDateTime.now(ZoneId.of("Europe/Madrid")));
}

}

Output (I'm based in kolkata,India):

2021-09-17T14:46:14.341+02:00[Europe/Madrid]

To get date and time of your zone.

Date date = new Date();
DateFormat df = new SimpleDateFormat("MM/dd/YYYY HH:mm a");
df.setTimeZone(TimeZone.getDefault());
df.format(date);

To get the date to a variable .

public static  String  getCurrentDate(){
    final ZonedDateTime now = ZonedDateTime.now(ZoneId.of("Asia/Kolkata"));
    String Temporal= DateTimeFormatter.ofPattern("yyyy-MM-dd").format(now);
    String today= LocalDate.now().format(DateTimeFormatter.ofPattern(Temporal));
    return today;
}

Date in 24 hrs format

Output:14/02/2020 19:56:49 PM

 Date date = new Date();
 DateFormat dateFormat = new SimpleDateFormat("dd/MM/yyyy HH:mm:ss aa");
 dateFormat.setTimeZone(TimeZone.getTimeZone("Europe/London"));
 System.out.println("date is: "+dateFormat.format(date));

Date in 12 hrs format

Output:14/02/2020 07:57:11 PM

 Date date = new Date();`enter code here`
 DateFormat dateFormat = new SimpleDateFormat("dd/MM/yyyy hh:mm:ss aa");
 dateFormat.setTimeZone(TimeZone.getTimeZone("Europe/London"));
 System.out.println("date is: "+dateFormat.format(date));