Java Tutorial: Generics in java | Java Generics [Unbounded wildcard in Java Generics] ~ foundjava

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Java Tutorial: Generics in java | Java Generics [Unbounded wildcard in Java Generics] 

GenericDemo.java

import java.util.ArrayList;
import java.util.List;

public class GenericDemo
{

    public static void main(String[] args)
    {
        List<String> nameList = new ArrayList<String>();
        nameList.add("Peter");
        nameList.add("Ram");
        printData(nameList);
        
        System.out.println("--------------------------");
        
        List<Integer> integerList = new ArrayList<Integer>();
        integerList.add(2);
        integerList.add(3);
        integerList.add(5);
        printData(integerList);

    }

    public static void printData(List<?> list)
    {
        for (Object obj : list)
        {
            System.out.println(obj);
        }
    }

}

Output

Peter
Ram
--------------------------
2
3
5

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