Java Generics Example

Generics.java

import java.util.ArrayList;

public class Generics<Items> {
  private ArrayList<Items> container = new ArrayList<Items>();

  public void fillContainer(Items item) {
    container.add(item);
  }

  public void displayContents() {
    for(Items item: container) {
      System.out.println(item);
    }
  }

  public static void main(String[] arguments) {
    Generics<Integer> integers = new Generics<Integer>();
    integers.fillContainer(3);
    integers.fillContainer(4);
    integers.displayContents();

    Generics<String> strings = new Generics<String>();
    strings.fillContainer("Hello");
    strings.fillContainer("World");
    strings.displayContents();

  }

}