CODEWITHSUNDEEP
javaobjectcasting
user1018517
user1018517

Reputation:

Treat object as another object

First I would like to say this is a cosmetic only question, as you will understand right away. I got an object, and I want that from now on, until I redecalre it, java will treat that object as another object, instead of me casting it again and again. For example, I got something like this:

Object obj = new SomeObject();
((SomeObject) obj).someMethod1();
((SomeObject) obj).someMethod2();
((SomeObject) obj).someMethod3();

Instead, I would like to do something like:

Object obj = new SomeObject();
obj treatas SomeObject; // This is the line that I dont even know if exist in java
obj.someMethod1();
obj.someMethod2();
obj.someMethod3();

Upvotes: 3

Views: 527

Answers (1)

Eran
Eran

Reputation: 393781

You have to create a new variable (or declare obj to be of SomeObject type in the first place):

Object obj = new SomeObject();
SomeObject sobj = (SomeObject) obj;
sobj.someMethod1();
sobj.someMethod2();
sobj.someMethod3();

And in the more general case, if you don't know for sure that obj is an instance of SomeObject :

if (obj instanceof SomeObject) {
    SomeObject sobj = (SomeObject) obj;
    sobj.someMethod1();
    sobj.someMethod2();
    sobj.someMethod3();
}

Upvotes: 5

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