GregorianCalendar類computeTime()方法 (GregorianCalendar Class computeTime() method)

• computeTime() method is available in java.util package.

  java.util包中提供了computeTime()方法 。

• computeTime() method is used to compute the calendar fields to the calendar time value.

  computeTime()方法用于將日歷字段計算為日歷時間值。

• computeTime() method is a non-static method, it is accessible with class object only and if we try to access the method with class name then we will get an error.

  computeTime()方法是一種非靜態方法，只能通過類對象訪問，如果嘗試使用類名稱訪問該方法，則會收到錯誤消息。

• computeTime() method does not throw an exception at the time of computing time of this calendar fields.

  在此日歷字段的計算時間， computeTime()方法不會引發異常。

Syntax:

句法：

    protected void computeTime();

Parameter(s):

參數：

• It does not accept any parameter.

  它不接受任何參數。

Return value:

返回值：

The return type of this method is void, it returns nothing.

此方法的返回類型為void ，不返回任何內容。

Example:

例：

// Java program to demonstrate the example 
// of void computeTime() method of 
// GregorianCalendar 
import java.util.*;
public class ComputeTimeOfGregorianCalendar extends GregorianCalendar {
public static void main(String[] args) {
// Instantiating a ComputeTimeOfGregorianCalendar object
ComputeTimeOfGregorianCalendar ca = new ComputeTimeOfGregorianCalendar();
// Display current calendar
System.out.println("ca: " + ca.getTime());
// By using clear(int fi) method to set the
// field unset
ca.clear(GregorianCalendar.MONTH);
// Display calendar
System.out.println("ca.clear(GregorianCalendar.MONTH): " + ca.getTime());
// By using set() method is to set a month 
//and invoke computeTime()
ca.set(GregorianCalendar.MONTH, 6);
ca.computeTime();
// Display calendar
System.out.println("ca.set(GregorianCalendar.MONTH,6): " + ca.getTime());
}
}

Output

輸出量

ca: Sat Feb 15 07:26:06 GMT 2020
ca.clear(GregorianCalendar.MONTH): Wed Jan 15 07:26:06 GMT 2020
ca.set(GregorianCalendar.MONTH,6): Wed Jul 15 07:26:06 GMT 2020

翻譯自: https://www.includehelp.com/java/gregoriancalendar-computetime-method-with-example.aspx