Example usage for java.util TreeMap TreeMap

Introduction

In this page you can find the example usage for java.util TreeMap TreeMap.

Prototype

public TreeMap() 

Source Link

Document

Constructs a new, empty tree map, using the natural ordering of its keys.

Usage

From source file:Main.java

public static void main(String args[]) {
    Map<String, Integer> atomNums = new TreeMap<String, Integer>();

    atomNums.put("A", 1);
    atomNums.put("B", 2);
    atomNums.put("C", 3);
    atomNums.put("D", 4);
    atomNums.put("E", 5);
    atomNums.put("F", 6);

    System.out.println("The map contains these " + atomNums.size() + " entries:");

    Set<Map.Entry<String, Integer>> set = atomNums.entrySet();

    for (Map.Entry<String, Integer> me : set) {
        System.out.print(me.getKey() + ", Atomic Number: ");
        System.out.println(me.getValue());
    }//from   ww w . j  a v  a  2s  .  c om
    TreeMap<String, Integer> atomNums2 = new TreeMap<String, Integer>();

    atomNums2.put("Q", 30);
    atomNums2.put("W", 82);

    atomNums.putAll(atomNums2);

    set = atomNums.entrySet();

    System.out.println("The map now contains these " + atomNums.size() + " entries:");
    for (Map.Entry<String, Integer> me : set) {
        System.out.print(me.getKey() + ", Atomic Number: ");
        System.out.println(me.getValue());
    }

    if (atomNums.containsKey("A"))
        System.out.println("A has an atomic number of " + atomNums.get("A"));

    if (atomNums.containsValue(82))
        System.out.println("The atomic number 82 is in the map.");
    System.out.println();

    if (atomNums.remove("A") != null)
        System.out.println("A has been removed.\n");
    else
        System.out.println("Entry not found.\n");

    Set<String> keys = atomNums.keySet();
    for (String str : keys)
        System.out.println(str + " ");

    Collection<Integer> vals = atomNums.values();
    for (Integer n : vals)
        System.out.println(n + " ");

    atomNums.clear();
    if (atomNums.isEmpty())
        System.out.println("The map is now empty.");
}

---

From source file:MainClass.java

public static void main(String args[]) {

    TreeMap<String, Double> tm = new TreeMap<String, Double>();

    tm.put("A", new Double(3434.34));
    tm.put("B", new Double(123.22));
    tm.put("C", new Double(1378.00));
    tm.put("D", new Double(99.22));
    tm.put("E", new Double(-19.08));

    Set<Map.Entry<String, Double>> set = tm.entrySet();

    for (Map.Entry<String, Double> me : set) {
        System.out.print(me.getKey() + ": ");
        System.out.println(me.getValue());
    }/*from w w w  .j  a v  a 2 s.  c o  m*/
    System.out.println();

    double balance = tm.get("B");
    tm.put("B", balance + 1000);

    System.out.println("B's new balance: " + tm.get("B"));
}

---

From source file:SortedMapDemo.java

public static void main(String[] args) {
    TreeMap sortedMap = new TreeMap();
    sortedMap.put("Adobe", "Mountain View, CA");
    sortedMap.put("IBM", "White Plains, NY");
    sortedMap.put("Learning Tree", "Los Angeles, CA");
    sortedMap.put("Microsoft", "Redmond, WA");
    sortedMap.put("Netscape", "Mountain View, CA");
    sortedMap.put("O'Reilly", "Sebastopol, CA");
    sortedMap.put("Sun", "Mountain View, CA");
    System.out.println(sortedMap);
    Object low = sortedMap.firstKey(), high = sortedMap.lastKey();
    System.out.println(low);//w  w  w .  j a  v  a  2s .  com
    System.out.println(high);
    Iterator it = sortedMap.keySet().iterator();
    for (int i = 0; i <= 6; i++) {
        if (i == 3)
            low = it.next();
        if (i == 6)
            high = it.next();
        else
            it.next();
    }
    System.out.println(low);
    System.out.println(high);
    System.out.println(sortedMap.subMap(low, high));
    System.out.println(sortedMap.headMap(high));
    System.out.println(sortedMap.tailMap(low));
}

---

From source file:DiameterMap.java

public static void main(String args[]) {
    String names[] = { "Mercury", "Venus", "Earth", "Mars", "Jupiter", "Saturn", "Uranus", "Neptune", "Pluto" };
    float diameters[] = { 4800f, 12103.6f, 12756.3f, 6794f, 142984f, 120536f, 51118f, 49532f, 2274f };
    Map map = new TreeMap();
    for (int i = 0, n = names.length; i < n; i++) {
        map.put(names[i], new Float(diameters[i]));
    }//from w  w w  .  j  a  va 2 s.  c o m
    Iterator it = map.keySet().iterator();
    Object obj;
    while (it.hasNext()) {
        obj = it.next();
        System.out.println(obj + ": " + map.get(obj));
    }
}

---

From source file:in.java

  public static void main(String[] args) {
  NavigableMap<Integer, String> map = new TreeMap<Integer, String>();
  map.put(2, "two");
  map.put(1, "one");
  map.put(3, "three");
  System.out.println("Original map: " + map + "\n");

  Entry firstEntry = map.pollFirstEntry();
  System.out.println("First entry: " + firstEntry);
  System.out.println("After polling the first entry: " + map + "\n");

  Entry lastEntry = map.pollLastEntry();
  System.out.println("Last entry:" + lastEntry);
  System.out.println("After polling last entry:" + map);
}

---

From source file:LogTest.java

public static void main(String[] args) throws IOException {
    String inputfile = args[0];//from ww w.j a  va2s.co m
    String outputfile = args[1];

    Map<String, Integer> map = new TreeMap<String, Integer>();

    Scanner scanner = new Scanner(new File(inputfile));
    while (scanner.hasNext()) {
        String word = scanner.next();
        Integer count = map.get(word);
        count = (count == null ? 1 : count + 1);
        map.put(word, count);
    }
    scanner.close();

    List<String> keys = new ArrayList<String>(map.keySet());
    Collections.sort(keys);

    PrintWriter out = new PrintWriter(new FileWriter(outputfile));
    for (String key : keys)
        out.println(key + " : " + map.get(key));
    out.close();
}

---

From source file:MyComparator.java

public static void main(String[] args) {
    TreeMap tm = new TreeMap();
    tm.put(1, new Double(344.34));
    tm.put(0, new Double(123.22));
    tm.put(4, new Double(138.00));
    tm.put(2, new Double(919.22));
    tm.put(3, new Double(-119.08));

    List<Map.Entry> valueList = new ArrayList(tm.entrySet());
    Collections.sort(valueList, new MyComparator());

    Iterator<Map.Entry> iterator = valueList.iterator();
    while (iterator.hasNext()) {
        Map.Entry entry = iterator.next();
        System.out.println("Value: " + entry.getValue());
    }//from   w w  w . j  a v a 2 s  . c o m
}

---

From source file:appStructure.MainApp.java

public static void main(String[] args) {

    setLookAndFeel();/* w w  w .j  a v a 2 s. c o m*/

    Map<String, Module> questionnaires = new TreeMap<String, Module>();
    creerQuestionaires(questionnaires);

    AppFrame AstroQuizz = new AppFrame(questionnaires);

    AstroQuizz.setVisible(true);

}

---

From source file:org.fusesource.cloudmix.tests.consumer.Main.java

public static void main(String[] args) {
    if (args.length > 0 && args[0].equals("-debug")) {
        Map<Object, Object> properties = new TreeMap<Object, Object>();
        properties.putAll(System.getProperties());
        for (Map.Entry<Object, Object> entry : properties.entrySet()) {
            System.out.println(" " + entry.getKey() + " = " + entry.getValue());
        }/*  w w  w.j  a v a2  s.com*/
    }

    ClassPathXmlApplicationContext applicationContext = new ClassPathXmlApplicationContext(
            "META-INF/spring/context.xml");
    applicationContext.start();

    System.out.println("Enter quit to stop");

    try {
        BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
        while (true) {
            String line = reader.readLine();
            if (line == null || line.trim().equalsIgnoreCase("quit")) {
                break;
            }
        }
    } catch (IOException e) {
        System.err.println("Caught: " + e);
        e.printStackTrace(System.err);
    }

    applicationContext.close();
}

---

From source file:org.fusesource.cloudmix.tests.broker.Main.java

public static void main(String[] args) {
    if (verbose || (args.length > 0 && args[0].equals("-debug"))) {
        Map<Object, Object> properties = new TreeMap<Object, Object>();
        properties.putAll(System.getProperties());
        for (Map.Entry<Object, Object> entry : properties.entrySet()) {
            System.out.println(" " + entry.getKey() + " = " + entry.getValue());
        }/*w  w  w.  j a v  a 2s  . c  o m*/
    }

    ClassPathXmlApplicationContext applicationContext = new ClassPathXmlApplicationContext(
            "META-INF/spring/activemq.xml");
    applicationContext.start();

    System.out.println("Enter quit to stop");

    try {
        BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
        while (true) {
            String line = reader.readLine();
            if (line == null || line.trim().equalsIgnoreCase("quit")) {
                break;
            }
        }
    } catch (IOException e) {
        System.err.println("Caught: " + e);
        e.printStackTrace(System.err);
    }

    applicationContext.close();
}

---

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