Example usage for java.util HashMap put

Introduction

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

Prototype

public V put(K key, V value)

Source Link

Document

Associates the specified value with the specified key in this map.

Usage

From source file:Main.java

public static void main(String args[]) {

    HashMap<String, String> hmap = new HashMap<String, String>();

    hmap.put("1", "A");
    hmap.put("2", "B");
    hmap.put("3", "C");
    hmap.put("4", "from java2s.com");

    // get typesafe view of the map
    Map<String, String> tsmap = Collections.checkedMap(hmap, String.class, String.class);

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

From source file:Main.java

public static void main(String[] args) {
    HashMap<String, String> hMap = new HashMap<String, String>();
    hMap.put("1", "One");
    hMap.put("2", "Two");
    hMap.put("3", "Three");

    Collection c = hMap.values();
    Iterator itr = c.iterator();//from  w  w w.j av  a 2 s .  co m
    while (itr.hasNext()) {
        System.out.println(itr.next());
    }
}

From source file:Main.java

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

    newmap.put(1, "tutorials");
    newmap.put(2, "from");
    newmap.put(3, "java2s.com");

    // create set view for the map
    Set set = newmap.entrySet();//from   www  . j av a 2s . co  m

    // check set values
    System.out.println("Set values: " + set);
}

From source file:Main.java

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

    myMap.put("a", 1);
    myMap.put("b", 2);
    myMap.put("c", 3);

    Set<String> stStrKeys = myMap.keySet();
    Iterator<String> itrs = stStrKeys.iterator();
    while (itrs.hasNext()) {
        String s = itrs.next();//from www  .  j a v a 2  s . com
        System.out.println(s + ": " + myMap.get(s));
    }
}

From source file:Main.java

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

    map.put("a", 1);
    map.put("b", 2);

    System.out.println("Before removal");
    for (String s : map.keySet()) {
        System.out.println(s);//from w w w .  ja va2 s.  c  o m
    }

    System.out.println("\n\nAfter removal");

    map.remove("a");
    for (String s : map.keySet()) {
        System.out.println(s);
    }
}

From source file:Main.java

public static void main(String[] args) {
    HashMap<String, String> hMap = new HashMap<String, String>();

    hMap.put("1", "One");
    hMap.put("2", "Two");
    hMap.put("3", "Three");

    Set st = hMap.keySet();//from   w  w w.java  2s .  com
    Iterator itr = st.iterator();

    while (itr.hasNext())
        System.out.println(itr.next());

    // remove 2 from Set
    st.remove("2");

    System.out.println(hMap.containsKey("2"));
}

From source file:Main.java

public static void main(String a[]) {
    HashMap hashMap = new HashMap();
    HashMap hashMap1 = new HashMap();

    hashMap.put(1, "One");
    hashMap.put(2, "Two");
    hashMap.put(3, "Three");
    System.out.println("Original HashMap : " + hashMap);

    hashMap1 = (HashMap) hashMap.clone();

    System.out.println("Copied HashMap : " + hashMap1);
}

From source file:HashMapDemo.java

public static void main(String args[]) {

    HashMap<String, Double> hm = new HashMap<String, Double>();

    hm.put("A", new Double(3.34));
    hm.put("B", new Double(1.22));
    hm.put("C", new Double(1.00));
    hm.put("D", new Double(9.22));
    hm.put("E", new Double(-19.08));

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

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

    double balance = hm.get("A");
    hm.put("A", balance + 1000);

    System.out.println(hm.get("A"));
}

From source file:CopyPDFFileAndAddMetaData.java

public static void main(String[] args) {
    try {/*w  ww  .  ja va2  s. c  om*/
        PdfReader reader = new PdfReader("YourOwnPDF.pdf");

        PdfStamper stamp = new PdfStamper(reader, new FileOutputStream("NewPDFFileFromPdfStamper.pdf"));

        HashMap<String, String> moreInfo = new HashMap<String, String>();
        moreInfo.put("Author", "YourName");
        moreInfo.put("Title", "YourTitle");
        moreInfo.put("Subject", "YourSubject");
        stamp.setMoreInfo(moreInfo);
        stamp.close();

    } catch (Exception de) {
        de.printStackTrace();
    }
}

From source file:HelloWorldAddMetadata.java

public static void main(String[] args) throws Exception {
    Document document = new Document();
    PdfWriter.getInstance(document, new FileOutputStream("HelloWorld.pdf"));
    document.open();/* w  w w. java2  s. c  om*/
    document.add(new Paragraph("Hello World"));
    document.close();

    PdfReader reader = new PdfReader("HelloWorld.pdf");
    System.out.println("Tampered? " + reader.isTampered());
    PdfStamper stamper = new PdfStamper(reader, new FileOutputStream("HelloWorldStampedMetadata.pdf"));
    System.out.println("Tampered? " + reader.isTampered());
    HashMap<String, String> info = reader.getInfo();
    info.put("Subject", "Hello World");
    info.put("Author", "your name");
    info.put("Keywords", "iText pdf");
    info.put("Title", "Hello World stamped");
    info.put("Creator", "your name");
    stamper.setMoreInfo(info);
    ByteArrayOutputStream baos = new ByteArrayOutputStream();
    XmpWriter xmp = new XmpWriter(baos, info);
    xmp.close();
    stamper.setXmpMetadata(baos.toByteArray());
    stamper.close();
}