Example usage for java.util Hashtable Hashtable

Introduction

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

Prototype

public Hashtable()

Source Link

Document

Constructs a new, empty hashtable with a default initial capacity (11) and load factor (0.75).

Usage

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");

    System.out.println("Initial hash table value: " + htable1);

    // remove element at key 3
    htable1.remove(3);/*  ww w  . j av  a 2 s.c  o  m*/

    System.out.println("Hash table value after remove: " + htable1);
}

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");

    System.out.println("Initial hash table value: " + htable1);

    String returnval = (String) htable1.put(1, "C");

    System.out.println("Return value: " + returnval);

    System.out.println("New hash table value: " + htable1);
}

From source file:Main.java

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

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

    // create enumeration
    Enumeration<String> e = htable.elements();

    System.out.println("Display result:");

    // display search result
    while (e.hasMoreElements()) {
        System.out.println(e.nextElement());
    }/*from w w  w  .ja va  2 s  . co  m*/
}

From source file:HTDemo.java

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

    Enumeration<String> names;
    String str;//from   www  .j  a v a2s  .  co  m
    double bal;

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

    names = balance.keys();
    while (names.hasMoreElements()) {
        str = names.nextElement();
        System.out.println(str + ": " + balance.get(str));
    }
    bal = balance.get("A");
    balance.put("A", bal + 1000);
    System.out.println("A's new balance: " + balance.get("A"));
}

From source file:Main.java

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

    Map m = Collections.unmodifiableMap(table);

    m.put("key3", "value3");

    System.out.println(m);//  w w  w.ja v  a2s.  c  o  m

}

From source file:Main.java

public static void main(String args[]) {
    // create two hash tables 
    Hashtable<Integer, String> htableclone = new Hashtable<Integer, String>();
    Hashtable<Integer, String> htable = new Hashtable<Integer, String>();

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

    // check table content
    System.out.println("Original hash table content: " + htable);

    // clone hash table
    htableclone = (Hashtable) htable.clone();

    // check content after clone
    System.out.println("Clone table content: " + htableclone);
}

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// www  .j ava 2  s  .c o m
        System.out.println(city + " is not located in the hashtable");
}

From source file:Main.java

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

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

    // create a set view
    Set<Entry<Integer, String>> nset = htable.entrySet();

    // display set result
    System.out.println("Set result:" + nset);
}

From source file:Main.java

public static void main(String[] s) {
    Hashtable<String, String> table = new Hashtable<String, String>();

    table.put("1", "Sunday");
    table.put("2", "Monday");
    table.put("3", "Tuesday");
    table.put("4", "Wednesday");
    table.put("5", "Thursday");
    table.put("6", "Friday");
    table.put("7", "Saturday");

    System.out.println("Initial collection: " + table);

    Map m = Collections.unmodifiableMap(table);

    // m.put("key3", "value3");
}

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");

    Set set = table.entrySet();/*from w  ww  .  ja va 2s.co m*/
    Iterator it = set.iterator();
    while (it.hasNext()) {
        Map.Entry entry = (Map.Entry) it.next();
        System.out.println(entry.getKey() + " : " + entry.getValue());
    }
}