Example usage for java.util HashMap keySet

Introduction

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

Prototype

public Set<K> keySet() 

Source Link

Document

Returns a Set view of the keys contained in this map.

Usage

From source file:MainClass.java

public static void main(String[] args) throws Exception {
    Document document = new Document();
    PdfWriter writer = PdfWriter.getInstance(document, new FileOutputStream("2.pdf"));
    MyPdfPageEventHelper tracker = new MyPdfPageEventHelper();
    writer.setPageEvent(tracker);/*from  ww  w . j a v a  2 s. c  om*/
    document.open();
    document.add(createParagraph("Fox", "Hello lazy dog."));

    document.newPage();
    HashMap lines = tracker.getLines();
    for (Iterator i = lines.keySet().iterator(); i.hasNext();) {
        String speaker = (String) i.next();
        Integer count = (Integer) lines.get(speaker);
        document.add(new Paragraph(speaker + ": " + count.intValue() + " lines."));
    }
    document.close();
}

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From source file:Main.java

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

    map.put(1, 2);/*from  w  w  w .  j a va  2s  .  co  m*/
    map.put(2, 3);
    map.put(3, 4);

    for (Integer key : map.keySet()) {
        System.out.println(map.get(key));
    }
}

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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  ww  w  . j  a va2 s.  c o m
        System.out.println(s + ": " + myMap.get(s));
    }
}

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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();
    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"));
}

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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);// w w w  . j a  v a  2  s.co  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<Integer, String> newmap = new HashMap<Integer, String>();

    // populate hash map
    newmap.put(1, "tutorials");
    newmap.put(2, "from");
    newmap.put(3, "java2s.com");

    // get keyset value from map
    Set keyset = newmap.keySet();

    // check key set values
    System.out.println("Key set values are: " + keyset);
}

---

From source file:Main.java

public static void main(String[] args) {
    HashMap<String, Integer> map = new HashMap<String, Integer>();
    map.put("d", 5);
    map.put("c", 4);
    map.put("b", 2);
    map.put("a", 1);

    Integer value[] = new Integer[map.size()];

    Set keySet = map.keySet();
    Iterator t = keySet.iterator();
    int a = 0;/*from w  w w .j  av  a  2  s.co  m*/
    while (t.hasNext()) {
        value[a] = map.get(t.next());
        a++;
    }

    Arrays.sort(value);

    for (int i = 0; i < map.size(); i++) {
        t = keySet.iterator();
        while (t.hasNext()) {
            String temp = (String) t.next();
            if (value[i].equals(map.get(temp))) {
                System.out.println(value[i] + " = " + temp);
            }
        }
    }
}

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From source file:Main.java

public static void main(String[] args) {

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

    hashmap.put("one", "1");
    hashmap.put("two", "2");
    hashmap.put("three", "3");
    hashmap.put("four", "4");
    hashmap.put("five", "5");
    hashmap.put("six", "6");

    Iterator<String> keyIterator = hashmap.keySet().iterator();
    Iterator<String> valueIterator = hashmap.values().iterator();

    while (keyIterator.hasNext()) {
        System.out.println("key: " + keyIterator.next());
    }/*from ww w . j  a  v  a 2 s  .  com*/

    while (valueIterator.hasNext()) {
        System.out.println("value: " + valueIterator.next());
    }
}

---

From source file:Main.java

public static void main(String[] args) throws IllegalAccessException {
    Class clazz = Color.class;
    Field[] colorFields = clazz.getDeclaredFields();

    HashMap<String, Color> singleColors = new HashMap<String, Color>();
    for (Field cf : colorFields) {
        int modifiers = cf.getModifiers();
        if (!Modifier.isPublic(modifiers))
            continue;

        Color c = (Color) cf.get(null);
        if (!singleColors.values().contains(c))
            singleColors.put(cf.getName(), c);
    }//w w  w .j av  a2 s .co m

    for (String k : singleColors.keySet()) {
        System.out.println(k + ": " + singleColors.get(k));
    }
}

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From source file:at.tuwien.ifs.somtoolbox.apps.VisualisationImageSaver.java

public static void main(String[] args) {
    JSAPResult res = OptionFactory.parseResults(args, OPTIONS);

    String uFile = res.getString("unitDescriptionFile");
    String wFile = res.getString("weightVectorFile");
    String dwmFile = res.getString("dataWinnerMappingFile");
    String cFile = res.getString("classInformationFile");
    String vFile = res.getString("inputVectorFile");
    String tFile = res.getString("templateVectorFile");
    String ftype = res.getString("filetype");
    boolean unitGrid = res.getBoolean("unitGrid");

    String basename = res.getString("basename");
    if (basename == null) {
        basename = FileUtils.extractSOMLibInputPrefix(uFile);
    }//w ww. ja v a2s  . co m
    basename = new File(basename).getAbsolutePath();
    int unitW = res.getInt("width");
    int unitH = res.getInt("height", unitW);

    String[] vizs = res.getStringArray("vis");

    GrowingSOM gsom = null;
    CommonSOMViewerStateData state = CommonSOMViewerStateData.getInstance();
    try {
        SOMLibFormatInputReader inputReader = new SOMLibFormatInputReader(wFile, uFile, null);
        gsom = new GrowingSOM(inputReader);

        SharedSOMVisualisationData d = new SharedSOMVisualisationData(cFile, null, null, dwmFile, vFile, tFile,
                null);
        d.readAvailableData();
        state.inputDataObjects = d;
        gsom.setSharedInputObjects(d);

        Visualizations.initVisualizations(d, inputReader, 0, Palettes.getDefaultPalette(),
                Palettes.getAvailablePalettes());

    } catch (FileNotFoundException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
        System.exit(1);
    } catch (SOMLibFileFormatException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
        System.exit(1);
    }

    if (ArrayUtils.isEmpty(vizs)) {
        System.out.println("No specific visualisation specified - saving all available visualisations.");
        vizs = Visualizations.getReadyVisualizationNames();
        System.out.println("Found " + vizs.length + ": " + Arrays.toString(vizs));
    }

    for (String viz : vizs) {
        BackgroundImageVisualizerInstance v = Visualizations.getVisualizationByName(viz);
        if (v == null) {
            System.out.println("Visualization '" + viz + "' not found!");
            continue;
        }
        BackgroundImageVisualizer i = v.getVis();

        GrowingLayer layer = gsom.getLayer();
        try {
            int height = unitH * layer.getYSize();
            int width = unitW * layer.getXSize();
            HashMap<String, BufferedImage> visualizationFlavours = i.getVisualizationFlavours(v.getVariant(),
                    gsom, width, height);
            ArrayList<String> keys = new ArrayList<String>(visualizationFlavours.keySet());
            Collections.sort(keys);

            // if the visualisation has more than 5 flavours, we create a sub-dir for it
            String subDirName = "";
            String oldBasename = basename; // save original base name for later
            if (keys.size() > 5) {
                String parentDir = new File(basename).getParentFile().getPath(); // get the parent path
                String filePrefix = basename.substring(parentDir.length()); // end the file name prefix
                subDirName = parentDir + File.separator + filePrefix + "_" + viz + File.separator; // compose a new
                // subdir name
                new File(subDirName).mkdir(); // create the dir
                basename = subDirName + filePrefix; // and extend the base name by the subdir
            }
            for (String key : keys) {
                File out = new File(basename + "_" + viz + key + "." + ftype);
                System.out.println("Generating visualisation '" + viz + "' as '" + out.getPath() + "'.");
                BufferedImage image = visualizationFlavours.get(key);
                if (unitGrid) {
                    VisualisationUtils.drawUnitGrid(image, gsom, width, height);
                }
                ImageIO.write(image, ftype, out);
            }
            basename = oldBasename; // reset base name
        } catch (SOMToolboxException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }
    System.exit(0);
}

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