java Java 中的 OffsetTime 减()方法，带示例

Java 中的 OffsetTime 减()方法，带示例

原文:https://www . geeksforgeeks . org/offsettime-减去-method-in-Java-with-examples/

The minus(amountToSubtract, unit) method of OffsetTime class in Java returns a copy of this time with the specified amount subtracted.

语法:

```java public OffsetTime minus(long amountToSubtract, TemporalUnit unit)

```

参数:该方法接受两个参数，描述如下:
- amountToSubtract :是一个强制参数，指定从结果中减去的单位数量，可以是负数。
- 单位:是强制参数，指定要减去的金额单位，不为空。
返回值:根据这个时间返回一个偏移量，减去指定的量，不为空

下面的程序说明了减()方法:

程序 1 :

```java // Java program to demonstrate the minus() method

import java.time.OffsetTime; import java.time.temporal.ChronoUnit;

public class GFG { public static void main(String[] args) { // Parses the time OffsetTime time = OffsetTime.parse("11:35:40+06:03"); System.out.println("Time after subtraction of hours: " + time.minus(2, ChronoUnit.HOURS)); } } ```

Output:

```java Time after subtraction of hours: 09:35:40+06:03

```

程序 2 :

```java // Java program to demonstrate the minus() method

import java.time.OffsetTime; import java.time.temporal.ChronoUnit;

public class GFG { public static void main(String[] args) { // Parses the time OffsetTime time = OffsetTime.parse("11:35:40+06:03"); System.out.println("Time after subtraction of minutes: " + time.minus(2, ChronoUnit.MINUTES)); } } ```

Output:

```java Time after subtraction of minutes: 11:33:40+06:03

```
The minus(amountToSubtract) method of OffsetTime class in Java returns a copy of this time with the specified amount subtracted.

语法:

```java public OffsetTime minus(TemporalAmount amountToSubtract)

```

参数:该方法接受单个参数 amountToSubtract ，指定要减去的金额，不为空。

返回值:根据这个时间，做减法，返回一个偏移量，不为空。

错误和异常:程序返回两个异常，描述如下:
- DateTimeException: 不能做减法就抛出。
- 算术异常:如果出现数值溢出，则抛出。
下面的程序说明了减()方法:

程序 1 :

```java // Java program to demonstrate the minus() method

import java.time.Duration; import java.time.OffsetTime;

public class GFG { public static void main(String[] args) { // Parses the time OffsetTime time = OffsetTime.parse("11:35:40+06:03"); System.out.println("Time after subtraction of hours: " + time.minus(Duration.ofHours(2))); } } ```

Output:

```java Time after subtraction of hours: 09:35:40+06:03

```

程序 2 :

```java // Java program to demonstrate the minus() method

import java.time.Duration; import java.time.OffsetTime;

public class GFG { public static void main(String[] args) { // Parses the time OffsetTime time = OffsetTime.parse("11:35:40+06:03"); System.out.println("Time after subtraction of hours: " + time.minus(Duration.ofMinutes(28))); } } ```

Output:

```java Time after subtraction of hours: 11:07:40+06:03

```