Programming Forums > Application Development > Java

fhslacrosse13 · Jun 2nd, 2008, 12:58 AM

I'm doing a program for my Data Structures class but I've ran into a little problem with my code that I can't seem to figure out. I have to override the toString(), equals(), and compareTo() methods all with generic type and I have everything working except equals().

(Toggle Plain Text)

public boolean equals(T other)
    {        
        Customer eOther = (Customer)other;
        if(id.equals(eOther.id))
        {
            return true;
        }
        else
        {
            return false;
        }
    }

I get a compiling error that says that I have declared two methods with the same name and is only allowed if one overrides the other. If I change equals() around to be for the Customer class that I am writing it works just fine...I have no clue what I'm doing incorrectly. I don't have the book for the class so I have no notes on this stuff. Any help is much appreciated.

titaniumdecoy · Jun 2nd, 2008, 1:04 AM

(Toggle Plain Text)

public boolean equals(Object obj) {
    if (!(object instanceof Customer))
        return false;
    Customer cust = (Customer)obj;
    // determine if cust is equal to this
    ...
}

fhslacrosse13 · Jun 2nd, 2008, 1:22 PM

Thanks

Jun 2nd, 2008, 12:58 AM	#1
fhslacrosse13 Newbie Join Date: Oct 2006 Posts: 25 Rep Power: 0	Generic type + equals() method I'm doing a program for my Data Structures class but I've ran into a little problem with my code that I can't seem to figure out. I have to override the toString(), equals(), and compareTo() methods all with generic type and I have everything working except equals(). (Toggle Plain Text) public boolean equals(T other) { Customer eOther = (Customer)other; if(id.equals(eOther.id)) { return true; } else { return false; } } public boolean equals(T other) { Customer eOther = (Customer)other; if(id.equals(eOther.id)) { return true; } else { return false; } } I get a compiling error that says that I have declared two methods with the same name and is only allowed if one overrides the other. If I change equals() around to be for the Customer class that I am writing it works just fine...I have no clue what I'm doing incorrectly. I don't have the book for the class so I have no notes on this stuff. Any help is much appreciated.

Jun 2nd, 2008, 1:04 AM	#2
titaniumdecoy Expert Programmer Join Date: Nov 2005 Posts: 856 Rep Power: 3	Re: Generic type + equals() method (Toggle Plain Text) public boolean equals(Object obj) { if (!(object instanceof Customer)) return false; Customer cust = (Customer)obj; // determine if cust is equal to this ... } public boolean equals(Object obj) { if (!(object instanceof Customer)) return false; Customer cust = (Customer)obj; // determine if cust is equal to this ... }

Jun 2nd, 2008, 1:22 PM	#3
fhslacrosse13 Newbie Join Date: Oct 2006 Posts: 25 Rep Power: 0	Re: Generic type + equals() method Thanks

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Programming Forums > Application Development > Java

Generic type + equals() method