Eclipse: changing a variable description in debug mode

Can I change the description of a variable?

I want to see my own line in this place. I want to create this line myself. for instance

"RTKAccount number=111 and FGSFDS"

insead of

"RTKAccount (id=830039244504)".  

I tried changing the method toString()in my class, but it did not work.

public String toString() {
    return "RTKAccount id=" + this.id + " number=" + this.number;
}