Creating a Type-specific Collection Using Generics - Java Collection Framework

Java examples for Collection Framework:List

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Description

Creating a Type-specific Collection Using Generics

Demo Code

import java.net.MalformedURLException;
import java.net.URL;
import java.util.ArrayList;
import java.util.List;

public class Main {

  public void m() {
    List<Integer> intlist = new ArrayList<Integer>();

    intlist.add(new Integer(123));
    intlist.add(null);//from ww w  .  ja  v a 2 s  .c o m
    List<Number> numlist = new ArrayList<Number>();

    numlist.add(new Integer(123));
    numlist.add(new Float(123));
    List<URL> urlList = new ArrayList<URL>();
    try {
      urlList.add(new URL("http://java2s.com"));
    } catch (MalformedURLException e) {
    }
    String s = urlList.get(0).getHost();
  }
}

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