如何从传递的对象中取回值？

Question

I'm trying to insert different data types into linked list. The problem is that after I insert data I don't know how to read values back when I display my data.

So how to retrieve the values in this kind of order:

List (first-->last): {brand1, 11,111}, {brand2, 22,222}
List (last-->first): {brand2, 22,222}, {brand1, 11,111} 

The output I get represent name of the object and then address of the object:

List (first-->last): Milk@1f5205c Milk@1fb069 
List (last-->first): Milk@1fb069 Milk@1f5205c 

This is my object class:

class Milk <T>
{
    String brand;
    double size;
    double price;

    Milk(String a, double b, double c)
    {
        brand = a;
        size = b;
        price = c;
    }
}

Answer 1

You need to override your Milk class's toString method so that it uses a custom version instead of falling back on Object 's implementation.

In your case, this would probably be as easy as throwing this in to your Milk class.

@Override
public String toString() {

    return brand;
}