java的equals方法

持续时间类equals()方法 (Duration Class equals() method)

• equals() method is available in java.time package.

  equals()方法在java.time包中可用。

• equals() method is used to identifies whether this Duration and the given object are equal or not.

  equals()方法用于标识此Duration和给定对象是否相等。

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

  equals()方法是一种非静态方法，仅可通过类对象访问，如果尝试使用类名访问该方法，则会收到错误消息。

• equals() method does not throw an exception at the time of comparing two objects.

  在比较两个对象时， equals()方法不会引发异常。

Syntax:

句法：

    public boolean equals(Duration d);

Parameter(s):

参数：

• Duration d – represents the object is to be compared to this object.

  持续时间d –表示要与该对象进行比较的对象。

Return value:

返回值：

The return type of this method is boolean, it returns true when both the compared objects are equal otherwise it returns false.

此方法的返回类型为boolean ，当两个比较对象相等时返回true，否则返回false。

Example:

例：

// Java program to demonstrate the example 
// of boolean equals(Duration d) method of Duration
import java.time.*;
import java.time.temporal.*;
public class EqualsOfDuration {
public static void main(String args[]) {
// Instantiates three Duration  objects
Duration du1 = Duration.ofHours(2);
Duration du2 = Duration.ofMinutes(2);
Duration du3 = Duration.between(LocalTime.MIN, LocalTime.MAX);
System.out.println("du1: " + du1);
System.out.println("du2: " + du2);
System.out.println("du3: " + du3);
System.out.println();
// compares this Duration object(du1)
// to the given Duration object(du2) for
// equality i.e here it returns false because
// the value of du1<> du2
boolean status = du1.equals(du2);
System.out.println("du1.equals(du2): " + status);
// compares this Duration object(du2)
// to the given Duration object(du3) for
// equality i.e here it returns false because
// the value of du2 <> du3
status = du2.equals(du3);
System.out.println("du2.equals(du3): " + status);
// compares this Duration object(du3)
// to the given Duration object(du3) for
// equality i.e here it returns true because
// the value of du2 == du3
status = du3.equals(du3);
System.out.println("du3.equals(du3): " + status);
}
}

Output

输出量

du1: PT2H
du2: PT2M
du3: PT23H59M59.999999999Sdu1.equals(du2): false
du2.equals(du3): false
du3.equals(du3): true

翻译自: https://www.includehelp.com/java/duration-equals-method-with-example.aspx

java的equals方法