List<String> a1 = new ArrayList<String>(); a1.add("Program"); a1.add("Creek"); a1.add("Java"); a1.add("Java");System.out.println("ArrayList Elements");System.out.print("\t" + a1 + "\n"); List<String> l1 = new LinkedList<String>(); l1.add("Program"); l1.add("Creek"); l1.add("Java"); l1.add("Java");System.out.println("LinkedList Elements");System.out.print("\t" + l1 + "\n"); Set<String> s1 = new HashSet<String>(); // or new TreeSet() will order the elements; s1.add("Program"); s1.add("Creek"); s1.add("Java"); s1.add("Java"); s1.add("tutorial");System.out.println("Set Elements");System.out.print("\t" + s1 + "\n"); Map<String, String> m1 = new HashMap<String, String>(); // or new TreeMap() will order based on keys m1.put("Windows", "2000"); m1.put("Windows", "XP"); m1.put("Language", "Java"); m1.put("Website", "programcreek.com");System.out.println("Map Elements");System.out.print("\t" + m1);Output:
ArrayList Elements [Program, Creek, Java, Java] LinkedList Elements [Program, Creek, Java, Java] Set Elements [tutorial, Creek, Program, Java] Map Elements {Windows=XP, Website=programcreek.com, Language=Java}
原文地址:http://blog.csdn.net/suifeng3051/article/details/39005231