The equals() method is an object comparison method in Java, used to determine the equality of two objects. If equal, it returns true, otherwise it returns false. It can be used to compare whether the property values of objects are the same. Custom equality comparison is usually implemented by overriding the equals() method. The steps to override the equals() method are: declare the equals() method, use if-else statements to compare the object's attribute values, and return true if they are equal, otherwise return false.
What is the equals() method?
The equals() method is a member method of the Object class in Java, used to compare the equality of two objects.
Function:
The equals() method determines whether two objects are equal. If equal, it returns true, otherwise it returns false.
Usage:
The equals() method is usually used to compare whether the attribute values of two objects are the same. The syntax is as follows:
public boolean equals(Object obj)
Among them, obj is the object to be compared.
Note: The
Steps to override the equals() method:
Example:
public class Person { private String name; private int age; public boolean equals(Object obj) { if (obj instanceof Person) { Person other = (Person) obj; return name.equals(other.name) && age == other.age; } return false; } }
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