如何在Java中获取操作系统时区？

import java.util.TimeZone;

public class Main {
    public static void main(String[] args) {
        TimeZone timeZone = TimeZone.getDefault();
        String timeZoneID = timeZone.getID();
        String timeZoneDisplayName = timeZone.getDisplayName();
        int timeZoneOffset = timeZone.getRawOffset();

        System.out.println("时区ID: " + timeZoneID);
        System.out.println("时区显示名称: " + timeZoneDisplayName);
        System.out.println("时区偏移量: " + timeZoneOffset + "毫秒");
    }
}