Java offsetTime compareTo()方法及示例

Java中OffsetTime类的 compareTo() 方法将这个时间与另一个时间进行比较，如果它们相等则返回0，或者根据比较结果返回一个正数或负数。

语法

public int compareTo(OffsetTime other)

参数： 该方法接受一个强制性参数 other ，它指定了将被比较的其他时间。

返回值： 它返回比较器的值。如果另一个日期较小，它返回一个负值，如果较大，则返回一个正值。

异常 ：如果传递的其他日期为空，该函数会抛出NullPointerException。

下面的程序说明了compareTo()方法。

程序1 :

// Java program to demonstrate the compareTo() method
  
import java.time.OffsetTime;
  
public class GFG {
    public static void main(String[] args)
    {
  
        // Parses the time
        OffsetTime time1
            = OffsetTime.parse("15:30:30+07:00");
  
        // Parses the time
        OffsetTime time2
            = OffsetTime.parse("15:30:30+07:00");
  
        // gets the offset time1
        System.out.println("time1: "
                           + time1);
  
        // gets the offset time2
        System.out.println("time1: "
                           + time2);
  
        System.out.println("time1 when compared"
                           + " to time2 returns: "
                           + time1.compareTo(time2));
    }
}

输出。

time1: 15:30:30+07:00
time1: 15:30:30+07:00
time1 when compared to time2 returns: 0

程序2 :

// Java program to demonstrate the compareTo() method
  
import java.time.OffsetTime;
  
public class GFG {
    public static void main(String[] args)
    {
  
        // Parses the time
        OffsetTime time1
            = OffsetTime.parse("15:30:30+07:00");
  
        // Parses the time
        OffsetTime time2
            = OffsetTime.parse("12:10:30+07:00");
  
        // gets the offset time1
        System.out.println("time1: "
                           + time1);
  
        // gets the offset time2
        System.out.println("time1: "
                           + time2);
  
        System.out.println("time1 when compared"
                           + " to time2 returns: "
                           + time1.compareTo(time2));
    }
}

输出。

time1: 15:30:30+07:00
time1: 12:10:30+07:00
time1 when compared to time2 returns: 1

程序3 ：:

// Java program to demonstrate the compareTo() method
  
import java.time.OffsetTime;
  
public class GFG {
    public static void main(String[] args)
    {
  
        // Parses the time
        OffsetTime time1
            = OffsetTime.parse("15:30:30+07:00");
  
        // Parses the time
        OffsetTime time2
            = OffsetTime.parse("17:10:30+07:00");
  
        // gets the offset time1
        System.out.println("time1: "
                           + time1);
  
        // gets the offset time2
        System.out.println("time1: "
                           + time2);
  
        System.out.println("time1 when compared"
                           + " to time2 returns: "
                           + time1.compareTo(time2));
    }
}

输出。

time1: 15:30:30+07:00
time1: 17:10:30+07:00
time1 when compared to time2 returns: -1

参考资料 : https://docs.oracle.com/javase/8/docs/api/java/time/OffsetTime.html#compareTo-java.time.OffsetTime-