Java 中的 LocalDateTime compareTo()方法，带示例
原文:https://www . geesforgeks . org/local datetime-compare to-method-in-Java-with-examples/
Java 中 LocalDateTime 类的 compareTo() 方法用于将该日期时间与作为参数传递的日期时间进行比较。
语法:
public int compareTo(ChronoLocalDateTime anotherDate)
参数:该方法接受一个参数另一个日期，该参数指定要比较的另一个日期时间。它不应为空。
返回:该函数返回一个整数值，这是比较后的比较值。
下面的程序说明了 LocalDateTime.compareTo()方法:
程序 1:
// Program to illustrate the compareTo() method
import java.util.*;
import java.time.*;
public class GfG {
public static void main(String[] args)
{
// Parses the date
LocalDateTime dt1
= LocalDateTime
.parse("2018-11-03T12:45:30");
// Prints the date
System.out.println("Date 1: " + dt1);
// Parses the date
LocalDateTime dt2
= LocalDateTime
.parse("2015-01-05T12:45:30");
// Prints the date
System.out.println("Date 2: " + dt2);
// Compares the date
System.out.println("After comparison: "
+ dt2.compareTo(dt1));
}
}
输出:
Date 1: 2018-11-03T12:45:30
Date 2: 2015-01-05T12:45:30
After comparison: -3
程序二:
// Program to illustrate the compareTo() method
import java.util.*;
import java.time.*;
public class GfG {
public static void main(String[] args)
{
// Parses the date
LocalDateTime dt1
= LocalDateTime
.parse("2010-12-05T12:50:30");
// Prints the date
System.out.println("Date 1: " + dt1);
// Parses the date
LocalDateTime dt2
= LocalDateTime
.parse("2012-05-10T12:50:30");
// Prints the date
System.out.println("Date 2: " + dt2);
// Compares the date
System.out.println("After comparison: "
+ dt2.compareTo(dt1));
}
}
输出:
Date 1: 2010-12-05T12:50:30
Date 2: 2012-05-10T12:50:30
After comparison: 2
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