Example usage for java.util Hashtable get

List of usage examples for java.util Hashtable get

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Introduction

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

Prototype

@SuppressWarnings("unchecked")
public synchronized V get(Object key)

Source Link

Document

Returns the value to which the specified key is mapped, or null if this map contains no mapping for the key.

Usage

From source file:MainClass.java

public static void main(String args[]) {

    Hashtable ht = new Hashtable();
    ht.put("Tokyo", "Japan");
    ht.put("Beijing", "China");
    ht.put("Bangkok", "Thailand");

    String city = "Beijing";
    String country = (String) ht.get(city);
    if (country != null)
        System.out.println(city + " is located in " + country);
    else/*from  w  ww .  j av a2  s .c  om*/
        System.out.println(city + " is not located in the hashtable");
}

From source file:MainClass.java

public static void main(String args[]) {
    Hashtable hashtable = new Hashtable();
    hashtable.put("apple", "red");
    hashtable.put("strawberry", "red");

    Enumeration e = hashtable.keys();
    while (e.hasMoreElements()) {
        Object k = e.nextElement();
        Object v = hashtable.get(k);
        System.out.println("key = " + k + "; value = " + v);
    }//from   w  w  w  .  j  a v  a  2 s .  co m

}

From source file:Main.java

public static void main(String args[]) {
    Hashtable<String, String> hash = new Hashtable<String, String>();
    hash.put("1", "one");
    hash.put("2", "two");
    hash.put("3", "three");

    Enumeration keys = hash.keys();
    while (keys.hasMoreElements()) {
        Object key = keys.nextElement();
        Object value = hash.get(key);

        System.out.println(key + " : " + value);
    }/*from  w  w w.ja  v a  2 s  .  c  o m*/
}

From source file:Main.java

public static void main(String args[]) {
    // create hash table 
    Hashtable<Integer, String> htable1 = new Hashtable<Integer, String>();

    // put values in table
    htable1.put(1, "A");
    htable1.put(2, "B");
    htable1.put(3, "C");
    htable1.put(4, "from java2s.com");

    // get values at key 3
    System.out.println("Values at key 3 is:" + htable1.get(3));
}

From source file:MainClass.java

public static void main(String[] s) {
    Hashtable table = new Hashtable();
    table.put("key1", "value1");
    table.put("key2", "value2");
    table.put("key3", "value3");

    Enumeration e = table.keys();
    while (e.hasMoreElements()) {
        String key = (String) e.nextElement();
        System.out.println(key + " : " + table.get(key));
    }//from  w ww  . j  a v a 2s. c o m
}

From source file:MainClass.java

public static void main(String[] s) {
    Hashtable table = new Hashtable();
    table.put("key1", "value1");
    table.put("key2", "value2");
    table.put("key3", "value3");

    Enumeration e = table.elements();
    while (e.hasMoreElements()) {
        String key = (String) e.nextElement();
        System.out.println(key + " : " + table.get(key));
    }/*w  w  w.  j  a  va2 s.c  o m*/

    System.out.println(table.values());
}

From source file:MainClass.java

public static void main(String args[]) {
    Hashtable<String, Double> balance = new Hashtable<String, Double>();

    Enumeration<String> names;
    String str;/*from   ww w.ja  v a  2  s .c o  m*/

    balance.put("A", 3434.34);

    names = balance.keys();
    while (names.hasMoreElements()) {
        str = names.nextElement();
        System.out.println(str + ": " + balance.get(str));
    }

    System.out.println();
}

From source file:PlanetDiameters.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 };
    Hashtable hash = new Hashtable();
    for (int i = 0, n = names.length; i < n; i++) {
        hash.put(names[i], new Float(diameters[i]));
    }/*from   w w  w  .j  a v  a 2 s. com*/
    Enumeration e = hash.keys();
    Object obj;
    while (e.hasMoreElements()) {
        obj = e.nextElement();
        System.out.println(obj + ": " + hash.get(obj));
    }
}

From source file:KeymapExample.java

public static void main(String[] args) {
    JTextArea area = new JTextArea(6, 32);
    Keymap parent = area.getKeymap();
    Keymap newmap = JTextComponent.addKeymap("KeymapExampleMap", parent);

    KeyStroke u = KeyStroke.getKeyStroke(KeyEvent.VK_U, InputEvent.CTRL_MASK);
    Action actionU = new UpWord();
    newmap.addActionForKeyStroke(u, actionU);

    Action actionList[] = area.getActions();
    Hashtable lookup = new Hashtable();
    for (int j = 0; j < actionList.length; j += 1)
        lookup.put(actionList[j].getValue(Action.NAME), actionList[j]);

    KeyStroke L = KeyStroke.getKeyStroke(KeyEvent.VK_L, InputEvent.CTRL_MASK);
    Action actionL = (Action) lookup.get(DefaultEditorKit.selectLineAction);
    newmap.addActionForKeyStroke(L, actionL);

    KeyStroke W = KeyStroke.getKeyStroke(KeyEvent.VK_W, InputEvent.CTRL_MASK);
    Action actionW = (Action) lookup.get(DefaultEditorKit.selectWordAction);
    newmap.addActionForKeyStroke(W, actionW);

    area.setKeymap(newmap);/*from www.ja v a  2  s.c o  m*/

    JFrame f = new JFrame("KeymapExample");
    f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    f.getContentPane().add(new JScrollPane(area), BorderLayout.CENTER);
    area.setText("www.\n java2s \n .com.");
    f.pack();
    f.setVisible(true);
}

From source file:Main.java

public static void main(String[] args) {
    JTextArea area = new JTextArea(6, 32);
    Keymap parent = area.getKeymap();
    Keymap newmap = JTextComponent.addKeymap("KeymapExampleMap", parent);

    KeyStroke u = KeyStroke.getKeyStroke(KeyEvent.VK_U, InputEvent.CTRL_MASK);
    Action actionU = new UppercaseAction();
    newmap.addActionForKeyStroke(u, actionU);

    Action actionList[] = area.getActions();
    Hashtable lookup = new Hashtable();
    for (int j = 0; j < actionList.length; j += 1)
        lookup.put(actionList[j].getValue(Action.NAME), actionList[j]);

    KeyStroke L = KeyStroke.getKeyStroke(KeyEvent.VK_L, InputEvent.CTRL_MASK);
    Action actionL = (Action) lookup.get(DefaultEditorKit.selectLineAction);
    newmap.addActionForKeyStroke(L, actionL);

    area.setKeymap(newmap);//from w ww .j a v a  2s.c  o m

    JFrame f = new JFrame();
    f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    f.add(new JScrollPane(area), BorderLayout.CENTER);
    area.setText("this is a test");
    f.setSize(300, 300);
    f.setVisible(true);
}