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    <p>You can't, if you keep things like they are now. As far as <code>ListR</code> knows, it contains <code>Object</code>s, and <code>Object</code>s do not contain any particular information. They have a method <code>toString</code>, that you can override, but it's not suggested to use it for presentation purposes.</p> <h3>Option 1: Internal interface</h3> <p>What you can do, if you're allowed to change things a bit, is to force the contents of <code>ListR</code> to implement an interface, such as</p> <pre><code>public interface Printable { String printedForm(); } </code></pre> <p>and then</p> <pre><code>class Product implements Printable{ //TODO: Whatever you want @Override public String printedForm() { //TODO return a pretty printed form of the product. //e.g. return this element's name } } class ListR&lt;T extends Printable&gt;{ //... public void print(){ Node a=first; while(curr!=null){ //You can now invoke printedForm, because you forced T to implement Printable System.out.println(a.printedForm()); a=a.next; } } } </code></pre> <h3>Option 2: external formatter</h3> <p>If you don't want / can't change the implementation of Product, or if you want to implement a more flexible style of printing, you can use an external <code>Formatter</code> object, that will format your products.</p> <pre><code>//Unmodified class Product { } interface ObjectFormatter&lt;T&gt; { String stringForm(T obj); } class ProductFormatter implements ObjectFormatter&lt;Product&gt; { @Override public String stringForm(Product obj) { //TODO return product name or whatever you want } } class ListR&lt;T&gt; { private final ProductFormatter&lt;? super T&gt; fmt; public ListR(ProductFormatter&lt;? super T&gt; formatter) { this.fmt = formatter; } //... public void print(){ Node a=first; while(curr!=null){ System.out.println(fmt.stringForm(a.elem)); a=a.next; } } } </code></pre> <p>Then, when you create the list:</p> <pre><code>ListR&lt;Product&gt; list = new ListR&lt;&gt;(new ProductFormatter()); </code></pre>
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    1. POobtaining elements from a generic class in Java?
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    1. USGiulio Franco
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    1. COthanks @Giulio Franco, your answer was great, it is a shame that a lot of people has downvote this question and were not able to put a simple answer by here
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