Example usage for java.util ArrayList ArrayList

Introduction

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

Prototype

public ArrayList(Collection<? extends E> c) 

Source Link

Document

Constructs a list containing the elements of the specified collection, in the order they are returned by the collection's iterator.

Usage

From source file:Main.java

public static void main(String[] args) {
    List<Person> roster = createRoster();

    System.out.println("Total age by gender:");
    Map<Person.Sex, Integer> totalAgeByGender = roster.stream().collect(
            Collectors.groupingBy(Person::getGender, Collectors.reducing(0, Person::getAge, Integer::sum)));

    List<Map.Entry<Person.Sex, Integer>> totalAgeByGenderList = new ArrayList<>(totalAgeByGender.entrySet());

    totalAgeByGenderList.stream()/*from   w  w  w .  j  a  v  a2  s.  co m*/
            .forEach(e -> System.out.println("Gender: " + e.getKey() + ", Total Age: " + e.getValue()));

}

---

From source file:Main.java

public static void main(String[] argv) throws Exception {
    DefaultTableModel model = new DefaultTableModel();
    JTable table = new JTable(model);
    model.addColumn("Col1");
    model.addRow(new Object[] { "r1" });
    model.addRow(new Object[] { "r2" });
    model.addRow(new Object[] { "r3" });

    Vector data = model.getDataVector();
    Vector row = (Vector) data.elementAt(1);
    // Copy the first column
    int mColIndex = 0;
    List colData = new ArrayList(table.getRowCount());
    for (int i = 0; i < table.getRowCount(); i++) {
        row = (Vector) data.elementAt(i);
        colData.add(row.get(mColIndex));
    }//ww  w. java2  s .  co m
    JFrame f = new JFrame();
    f.setSize(300, 300);
    f.add(new JScrollPane(table));
    f.setVisible(true);
}

---

From source file:Main.java

public static void main(String[] args) {
    List<Person> roster = createRoster();

    System.out.println("Names by gender:");
    Map<Person.Sex, List<String>> namesByGender = roster.stream().collect(
            Collectors.groupingBy(Person::getGender, Collectors.mapping(Person::getName, Collectors.toList())));

    List<Map.Entry<Person.Sex, List<String>>> namesByGenderList = new ArrayList<>(namesByGender.entrySet());

    namesByGenderList.stream().forEach(e -> {
        System.out.println("Gender: " + e.getKey());
        e.getValue().stream().forEach(f -> System.out.println(f));
    });/*  w  w w.  j  av  a  2 s . com*/

}

---

From source file:EmpComparator.java

public static void main(String args[]) {
    String names[] = { "Bart", "Hugo", "Lisa", "Marge", "Homer", "Maggie", "Roy" };

    // Convert to list
    List list = new ArrayList(Arrays.asList(names));

    // Ensure list sorted
    Collections.sort(list);//from   ww w  . ja va 2s . c  o  m
    System.out.println("Sorted list: [length: " + list.size() + "]");
    System.out.println(list);

    // Search for element in list
    int index = Collections.binarySearch(list, "Maggie");
    System.out.println("Found Maggie @ " + index);

    // Search for element not in list
    index = Collections.binarySearch(list, "Jimbo Jones");
    System.out.println("Didn't find Jimbo Jones @ " + index);

    // Insert
    int newIndex = -index - 1;
    list.add(newIndex, "Jimbo Jones");
    System.out.println("With Jimbo Jones added: [length: " + list.size() + "]");
    System.out.println(list);

    // Min should be Bart
    System.out.println(Collections.min(list));
    // Max should be Roy
    System.out.println(Collections.max(list));

    Comparator comp = Collections.reverseOrder();

    // Reversed Min should be Roy
    System.out.println(Collections.min(list, comp));
    // Reversed Max should be Bart
    System.out.println(Collections.max(list, comp));
}

---

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 . ja va  2s .  c  om
}

---

From source file:LogTest.java

public static void main(String[] args) throws IOException {
    String inputfile = args[0];/*  w ww  .j  a va  2 s . c om*/
    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:postenergy.PostHttpClient.java

public static void main(String[] args) {
    HttpClient client = new DefaultHttpClient();
    HttpPost post = new HttpPost("http://iplant.dk/addData.php?n=mindass");

    try {/*  w w w . ja v  a2  s  . c om*/

        List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>(1);
        nameValuePairs.add(new BasicNameValuePair("?n", "=mindass"));

        post.setEntity(new UrlEncodedFormEntity(nameValuePairs));
        HttpResponse response = client.execute(post);
        BufferedReader rd = new BufferedReader(new InputStreamReader(response.getEntity().getContent()));

        String line = "";
        while ((line = rd.readLine()) != null) {
            System.out.println(line);
            if (line.startsWith("Input:")) {
                String key = line.substring(6);
                // do something with the key
                System.out.println("key:" + key);
            }

        }
    } catch (IOException e) {
        System.out.println("There was an error: " + e);
    }
}

---

From source file:ArrayListComboBoxModel.java

public static void main(String args[]) {
    JFrame frame = new JFrame("ArrayListComboBoxModel");
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

    Collection col = System.getProperties().values();
    ArrayList arrayList = new ArrayList(col);
    ArrayListComboBoxModel model = new ArrayListComboBoxModel(arrayList);

    JComboBox comboBox = new JComboBox(model);

    Container contentPane = frame.getContentPane();
    contentPane.add(comboBox, BorderLayout.NORTH);
    frame.setSize(300, 225);/*from  ww w. j a v a 2 s  .c o  m*/
    frame.setVisible(true);
}

---

From source file:com.sm.replica.TestRClient.java

public static void main(String[] args) {
    int i = 10;//from   w w w. j a  v  a  2s.  c om
    List<String> list = new ArrayList<String>(i);
    for (int j = 0; j < i; j++)
        list.add(null);
    logger.info("freq " + list.size());

    String logPath = "/Users/mhsieh/java/open/voldemort-0.81/config/addon-1/data/log";
    String store = "test";
    CacheStore trxLog = new CacheStore(logPath, null, 0, store, false);
    ReplicaClient client = new NTReplicaClient("localhost:6910", store, trxLog, logPath);
    new Thread(client).start();
}

---

From source file:main.StratioENEI.java

/**
 * @param args the command line arguments
 *//*  w w w . j a  v  a 2s  .c o  m*/
public static void main(String[] args) throws IOException {
    // TODO code application logic here
    float[][] custos;
    List<String> ordem;
    List<String> cidades;
    float custoTotal;
    int nCidades = Integer.parseInt(args[0]);
    String cidadeInicial = args[1];
    String cidadeFinal = args[2];

    for (Mode m : Mode.values()) {
        custos = new float[nCidades][nCidades];
        cidades = new ArrayList<>(nCidades);
        ordem = new ArrayList<>(nCidades);
        readFromCSV(m.file, custos, cidades);

        custoTotal = calculate(custos, cidades.indexOf(cidadeInicial), cidades.indexOf(cidadeFinal), ordem);

        printRota(custoTotal, cidadeInicial, cidadeFinal, cidades, ordem, m);
    }
}

---

• «
• 1
• 2
• 3
• 4
• 5
• 6
• 7
• 8
• »