java的equals方法

LocalDateTime類equals()方法 (LocalDateTime 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 check whether this date-time and the given object are equal or not.

  equals()方法用于檢查此日期時(shí)間和給定對(duì)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(tài)方法，僅可通過類對(duì)象訪問，如果嘗試使用類名訪問該方法，則會(huì)收到錯(cuò)誤消息。

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

  在比較兩個(gè)對(duì)象時(shí)， equals()方法不會(huì)引發(fā)異常。

Syntax:

句法：

public boolean equals(Object o);

Parameter(s):

參數(shù)：

• Object o – represents the object is to be compared to this object.

  對(duì)象o –表示要與該對(duì)象進(jìn)行比較的對(duì)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(dāng)兩個(gè)比較對(duì)象相等時(shí)返回true，否則返回false。

Example:

例：

// Java program to demonstrate the example // of boolean equals(Object o) method // of LocalDateTimeimport java.time.*;public class EqualsOfLocalDateTime {public static void main(String args[]) {// Instantiates two LocalDateTimeLocalDateTime da_ti1 = LocalDateTime.parse("2005-10-05T10:10:10");LocalDateTime da_ti2 = LocalDateTime.now();// Display da_ti1, da_ti2System.out.println("LocalDateTime da_ti1 and da_ti2: ");System.out.println("da_ti1: " + da_ti1);System.out.println("da_ti2: " + da_ti2);System.out.println();// Here, this method compare this date-time// to the given object for equality// i.e. it returns false because both// objects date and time are not sameboolean status = da_ti1.equals(da_ti2);// Display statusSystem.out.println("da_ti1.equals(da_ti2): " + status);// Here, this method compares this date-time// to the given object for equality// i.e. it returns true because both // objects date and time are samestatus = da_ti1.equals(da_ti1);// Display statusSystem.out.println("da_ti1.equals(da_ti1): " + status);} }

Output

輸出量

LocalDateTime da_ti1 and da_ti2: da_ti1: 2005-10-05T10:10:10 da_ti2: 2020-06-04T08:41:24.891685da_ti1.equals(da_ti2): false da_ti1.equals(da_ti1): true

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

java的equals方法

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