Question

How can i achieve this in java. i have an object which has properties.

public class Object {

    private final Credentials Credentials;
    private final int PageSize;
    private final int PageStart;
    private final int DefaultFilterId;

    public Object(Credentials Credentials, int PageSize, int PageStart, 
int DefaultFilterId) {
            this.Credentials = Credentials;
            this.PageSize = PageSize;
            this.PageStart = PageStart;
            this.DefaultFilterId = DefaultFilterId;
       }

    }

Now i am forming a this object like this

Object obj = new Object(args);

At some point i need the same Object, with new properties added but removing some.

I do something like this in javascript.

var myCars=new Array();
myCars[0]="Saab";
myCars[1]="Volvo";
myCars[2]="BMW";

delete myCars[1]; or myCars.splice(1,1);

Answer 1

public class Object {

    private Credentials credentials;
    private int PageSize;
    private int PageStart;
    private int DefaultFilterId;

    public Object(Credentials credentials, int PageSize, int PageStart, int DefaultFilterId) {
        this.credentials = credentials;
        this.PageSize = PageSize;
        this.PageStart = PageStart;
        this.DefaultFilterId = DefaultFilterId;
    }

    // do that for the properties you want to be able to modify
    public void setCredentials(Credentials newCredentials) {
         this.credentials = newCredentials;
    }

}

And you use that:

object.setCredentials(yourNewCredentials)

Also, you shouldn’t name your object “Object”, it’s the base class for all the classes in Java.