java的equals方法

持續時間類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()方法用于標識此Duration和給定對象是否相等。

• 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()方法是一種非靜態方法，僅可通過類對象訪問，如果嘗試使用類名訪問該方法，則會收到錯誤消息。

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

  在比較兩個對象時， equals()方法不會引發異常。

Syntax:

句法：

public boolean equals(Duration d);

Parameter(s):

參數：

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

  持續時間d –表示要與該對象進行比較的對象。

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.

此方法的返回類型為boolean ，當兩個比較對象相等時返回true，否則返回false。

Example:

例：

// Java program to demonstrate the example // of boolean equals(Duration d) method of Durationimport java.time.*; import java.time.temporal.*;public class EqualsOfDuration {public static void main(String args[]) {// Instantiates three Duration objectsDuration 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<> du2boolean 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 <> du3status = 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 == du3status = du3.equals(du3);System.out.println("du3.equals(du3): " + status);} }

Output

輸出量

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

翻譯自: https://www.includehelp.com/java/duration-equals-method-with-example.aspx

java的equals方法

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