toString() ? - Java

The purpose to toStirng is clearly documented in the API:
Returns a string representation of the object. In general, the toString method returns a string that "textually represents" this object. The result should be a concise but informative representation that is easy for a person to read. It is recommended that all subclasses override this method.
Object#toString() will produce:
The toString method for class Object returns a string consisting of the name of the class of which the object is an instance, the at-sign character `@', and the unsigned hexadecimal representation of the hash code of the object. In other words, this method returns a string equal to the value of:
 getClass().getName() + '@' + Integer.toHexString(hashCode())
If you override toString in your class call to default Object#toString() will be replaced by yourclass#toString().In your current code If you try to print Item instance the output will be of format:
name +": $" + price+":" + qty;

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