Java 中的等时日期(时钟)方法，示例
原文:https://www . geesforgeks . org/isochronomics-date now clock-method-in-Java-with-example/
Java . time . chrono . isochronology类的 dateNow() 方法用于根据 Iso 日历系统从指定的时钟对象中获取当前的本地日期。
语法:
public LocalDate dateNow(Clock clock)
参数:该方法以时钟的对象为参数。
返回值:该方法根据 Hijrah 日历系统从指定的时钟对象返回本地日期。
以下是举例说明 dateNow() 方法的例子:
例 1:
// Java program to demonstrate
// dateNow() method
import java.util.*;
import java.io.*;
import java.time.*;
import java.time.chrono.*;
public class GFG {
public static void main(String[] argv)
{
try {
// creating and initializing LocalDate Object
LocalDate hidate = LocalDate.now();
// getting IsoChronology used in localDate
IsoChronology crono = hidate.getChronology();
// creating and initializing clock object
Clock clock = Clock.systemUTC();
// getting LocalDate for the
// given clock object
// by using dateNow() method
LocalDate date = crono.dateNow(clock);
// display the result
System.out.println("LocalDate is: " + date);
}
catch (DateTimeException e) {
System.out.println("passed parameter can "
+ "not form a date");
System.out.println("Exception thrown: " + e);
}
}
}
输出:
LocalDate is: 2020-03-08
例 2:
// Java program to demonstrate
// dateNow() method
import java.util.*;
import java.io.*;
import java.time.*;
import java.time.chrono.*;
public class GFG {
public static void main(String[] argv)
{
try {
// creating and initializing LocalDate Object
LocalDate hidate = LocalDate.now();
// getting IsoChronology used in localDate
IsoChronology crono = hidate.getChronology();
// creating and initializing clock object
Clock clock = Clock.systemUTC();
// setting clock
clock = Clock.tick(clock,
Duration.ofDays(100));
// getting LocalDate for the
// given clock object
// by using dateNow() method
LocalDate date = crono.dateNow(clock);
// display the result
System.out.println("LocalDate is: " + date);
}
catch (DateTimeException e) {
System.out.println("passed parameter can "
+ "not form a date");
System.out.println("Exception thrown: " + e);
}
}
}
输出:
LocalDate is: 2020-02-08
参考:T2
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