Java的.time.ZoneOffset类在Java中
时区偏移量是时区与格林威治/UTC 不同的时间量。这通常是一个艰难而快速的小时数和分钟数。从Java的time包中，ZoneOffset类用于表示UTC区域的固定区域偏移量，继承了ZoneId类，实现了Comparable接口。
public final class ZoneOffset extends ZoneId
implements TemporalAccessor, TemporalAdjuster, Comparable
ZoneOffset 类具有三个字段：
- MAX：支持的最大区域偏移量。
- MIN：它是支持的最小区域偏移量。
- UTC：它是 UTC 的时区偏移常数。
ZoneOffset 类的方法
| Method | Description |
|---|---|
| adjustInto(Temporal temporal) | This method is used to adjusts the specified temporal object to have the same offset as this object. |
| compareTo(ZoneOffset other) | This method compares this offset to another offset in descending order. |
| equals(Object obj) | This method checks if this offset is equal to another offset. |
| from(TemporalAccessor temporal) | This method obtains an instance of ZoneOffset from a temporal object. |
| get(TemporalField field) | This method is Used to get the value of the specified field from this offset as an int |
| getId() | This method gets the normalized zone offset ID. |
| getLong(TemporalField field) | This method gets the value of the specified field from this offset as a long. |
| getRules() | This method gets the associated time-zone rules. |
| getTotalSeconds() | This method gets the total zone offset in seconds. |
| hashCode() | A hash code for this offset. |
| isSupported(TemporalField field) | This method checks if the specified field is supported. |
| of(String offsetId) | This method is Used to obtain an instance of ZoneOffset using the ID. |
| ofHours(int hours) | This method is Used to obtain an instance of ZoneOffset using an offset in hours |
| ofHoursMinutes(int hours, int minutes) | This method is Used to obtain an instance of ZoneOffset using an offset in hours and minute |
| ofHoursMinutesSeconds(int hours, int minutes, int seconds) | This method obtains an instance of ZoneOffset using an offset in hours, minutes and seconds. |
| ofTotalSeconds(int totalSeconds) | This method obtains an instance of ZoneOffset specifying the total offset in seconds |
| query(TemporalQuery | This method queries this offset using the specified query. |
| range(TemporalField field) | This method gets the range of valid values for the specified field. |
| toString() | This method outputs this offset as a String, using the normalized ID. |
1. ofHoursMinutes() 方法：
syntax:
public static ZoneOffset ofHoursMinutes(int Hours, int Minutes)
此方法用于使用以小时和分钟为单位的偏移量来获取 ZoneOffset 的实例。
Java
// Example of ofHoursMinutes() Method
import java.time.ZoneOffset;
public class GFG {
public static void main(String[] args) {
ZoneOffset zone = ZoneOffset.ofHoursMinutes(7,15);
System.out.println(zone);
}
}Java
//Example of ofHours() Method
import java.time.*;
import java.time.ZoneOffset;
public class GFG {
public static void main(String[] args) {
ZoneOffset zone = ZoneOffset.ofHours(4);
System.out.println(zone);
}
}输出
+07:152. ofHours() 方法
syntax:
public static ZoneOffset ofHours(int hours)
使用以小时为单位的偏移量获取 ZoneOffset 的实例。
Java
//Example of ofHours() Method
import java.time.*;
import java.time.ZoneOffset;
public class GFG {
public static void main(String[] args) {
ZoneOffset zone = ZoneOffset.ofHours(4);
System.out.println(zone);
}
}
输出
+04:00