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) {

    Dictionary d = new Hashtable();

    // put some elements
    d.put("1", "from java2s.com");
    d.put("2", "Cocoa");
    d.put("5", "Coffee");

    // print how many times put was called
    System.out.println("Number of times put was called:" + d.size());
}

From source file:Main.java

public static void main(String[] args) {
    Dictionary d = new Hashtable();

    // add some elements
    d.put("1", "from java2s.com");
    d.put("2", "Cocoa");
    d.put("5", "Coffee");

    // return an enumeration of the keys from this dictionary.
    for (Enumeration e = d.keys(); e.hasMoreElements();) {
        System.out.println(e.nextElement());
    }/*  w  w  w .  j  av  a 2s  .co  m*/
}

From source file:Main.java

public static void main(String[] args) {

    Dictionary d = new Hashtable();

    // add elements in the hashtable
    d.put("1", "from java2s.com");
    d.put("2", "Cocoa");
    d.put("5", "Coffee");

    // return true if this dictionary maps no keys to value.
    boolean b = d.isEmpty();
    System.out.println("Dictionary is empty:" + b);
}

From source file:Main.java

public static void main(String[] args) {

    Dictionary d = new Hashtable();

    // add some elements
    d.put("1", "from java2s.com");
    d.put("2", "Cocoa");
    d.put("5", "from java2s.com");

    // remove one element
    System.out.println(d.get("5"));
    System.out.println(d.remove("5") + " has been removed");
    System.out.println(d.get("5"));
}

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");

    System.out.println(table.containsKey("key3"));

}

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");

    System.out.println(table.contains("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");

    System.out.println(table.isEmpty());
    System.out.println(table.size());
}

From source file:Main.java

public static void main(String[] args) {

    Dictionary d = new Hashtable();

    // add 2 elements
    d.put(1, "Cocoa");
    d.put(4, "from java2s.com" + "Bar");
    System.out.println("1 is " + d.get(1));
    System.out.println("4 is " + d.get(4));

    // generates a series of elements, one at a time
    for (Enumeration e = d.elements(); e.hasMoreElements();) {
        System.out.println(e.nextElement());
    }/* w w  w  .  ja va2s .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");

    table.remove("key1");

    System.out.println(table);/*from w w  w  . j a va 2 s .  c  om*/
}

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");

    table.clear();//  w  ww. jav a2  s  .co m

    System.out.println(table);
}