CODEWITHSUNDEEP
java
Jeets
Jeets

Reputation: 3377

Not able to compare objects in Java string getting appended to classname

I am comparing two objects in Java and have implemented equals and hashcode.

Though the objects are equal the comparison returns false.

I found that in the equals implementation it's printing the class of the two objects as different although they are same.

For one it prints: com.salebuild.model.TechnologyProduct
While for the other it prints: com.salebuild.model.TechnologyProduct_$$_javassist_71

So it fails in this condition in the equals method:

if (getClass() != obj.getClass())
{
    return false;
}

Unable to find why it's appending this string: _$$_javassist_71

How can I overcome this? Could anyone suggest?

Upvotes: 2

Views: 124

Answers (2)

TheEwook
TheEwook

Reputation: 11117

I would write something like that instead:

if (!(this instanceof TechnologyProduct))
{
    return false;
}

Upvotes: 1

svz
svz

Reputation: 4588

Use instanceof to check if both objects are of the same class.

Here is the code Eclipse offers to check object equality:

public boolean equals(Object obj) {
    if (this == obj)
        return true;
    if (obj == null)
        return false;
    if (!(obj instanceof LdapUserDetails)) //check class here
        return false;

    // check fields for equality here
}

Upvotes: 3

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