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java日历类add方法
computeTime() method is available in java.util package.
java.util包中提供了computeTime()方法 。
computeTime() method is for conversion of current field values to the ms(millisecond) time value time in fields().
computeTime()方法用于将当前字段值转换为fields()中的ms(毫秒)时间值time。
computeTime() method is a non-static method, it is accessible with the class object and if we try to access these methods with the class name then we will get an error.
computeTime()方法是一种非静态方法,可通过类对象访问,如果尝试使用类名称访问这些方法,则会收到错误消息。
computeTime() method does not throw an exception at the time of updating current field values.
在更新当前字段值时, computeTime()方法不会引发异常。
Syntax:
句法:
protected abstract void computeTime();
Parameter(s):
参数:
It does not accept any parameter.
它不接受任何参数。
Return value:
返回值:
The return type of the method is void, it returns nothing.
该方法的返回类型为void ,不返回任何内容。
Example:
例:
// Java Program to demonstrate the example of// void computeTime() method of Calendarimport java.util.*;public class ComputeTimeOfCalendar extends GregorianCalendar { public static void main(String[] args) { // Instantiating a Calendar object ComputeTimeOfCalendar ca = new ComputeTimeOfCalendar(); // 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
输出量
ca: Fri Jan 24 12:32:39 GMT 2020ca.clear(GregorianCalendar.MONTH): Fri Jan 24 12:32:39 GMT 2020ca.set(GregorianCalendar.MONTH,6): Fri Jul 24 12:32:39 GMT 2020
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java日历类add方法
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