Example usage for java.util Map get

Introduction

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

Prototype

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:Main.java

public static void main(String[] a) {

    Map<String, String> map = new HashMap<String, String>();
    map.put("key1", "value1");
    map.put("key2", "value2");
    map.put("key3", "value3");

    System.out.println(map.get("key2"));
}

From source file:MainClass.java

public static void main(String[] args) throws Exception {
    PdfReader reader = new PdfReader("2.pdf");
    Map info = reader.getInfo();
    for (Iterator i = info.keySet().iterator(); i.hasNext();) {
        String key = (String) i.next();
        String value = (String) info.get(key);
        System.out.println(key + ": " + value);
    }/* w w  w  .  j  av  a 2 s .c  om*/
    if (reader.getMetadata() == null) {
        System.out.println("No XML Metadata.");
    } else {
        System.out.println("XML Metadata: " + new String(reader.getMetadata()));
    }
}

From source file:Main.java

public static void main(String[] a) {

    Map<String, String> map = new HashMap<String, String>();
    map.put("key1", "value1");
    map.put("key2", "value2");
    map.put("key3", "value3");

    System.out.println(map.get("key2"));
    System.out.println(map.containsKey("key2"));
    System.out.println(map.containsKey("key4"));
}

From source file:Main.java

public static void main(String[] args) {
    Map<Character, Integer> counting = new HashMap<Character, Integer>();
    String testcase1 = "this is a test";
    for (char ch : testcase1.toCharArray()) {
        Integer freq = counting.get(ch);
        counting.put(ch, (freq == null) ? 1 : freq + 1);
    }//  w  w w  . jav a2 s .co m
    System.out.println(counting.size() + " distinct characters:");
    System.out.println(counting);
}

From source file:Main.java

public static void main(String[] args) {
    String yourString = "UNDERSTAND";
    Map<Character, Integer> count = new TreeMap<Character, Integer>();
    for (char c : yourString.toCharArray()) {
        if (count.containsKey(c)) {
            count.put(c, (int) count.get(c) + 1);
        } else {/*w  ww .jav a2s  .c  om*/
            count.put(c, 1);
        }
    }
    System.out.println(count);
}

From source file:Main.java

public static void main(String args[]) {

    String s = "this is a test this is a test";
    String[] splitted = s.split(" ");
    Map<String, Integer> hm = new HashMap<String, Integer>();

    for (int i = 0; i < splitted.length; i++) {
        if (hm.containsKey(splitted[i])) {
            int cont = hm.get(splitted[i]);
            hm.put(splitted[i], cont + 1);
        } else {//from  w w w. j  a  va 2  s .c  o m
            hm.put(splitted[i], 1);
        }
    }
    System.out.println(hm);
}

From source file:QueryProperties.java

public static void main(String[] args) {
    VirtualUniverse vu = new VirtualUniverse();
    Map vuMap = vu.getProperties();

    System.out.println("version = " + vuMap.get("j3d.version"));
    System.out.println("vendor = " + vuMap.get("j3d.vendor"));
    System.out.println("specification.version = " + vuMap.get("j3d.specification.version"));
    System.out.println("specification.vendor = " + vuMap.get("j3d.specification.vendor"));
    System.out.println("renderer = " + vuMap.get("j3d.renderer") + "\n");

    GraphicsConfigTemplate3D template = new GraphicsConfigTemplate3D();

    /*/*from ww  w  .jav  a2 s.c o  m*/
     * We need to set this to force choosing a pixel format that support the
     * canvas.
     */
    template.setStereo(template.PREFERRED);
    template.setSceneAntialiasing(template.PREFERRED);

    GraphicsConfiguration config = GraphicsEnvironment.getLocalGraphicsEnvironment().getDefaultScreenDevice()
            .getBestConfiguration(template);

    Map c3dMap = new Canvas3D(config).queryProperties();

    System.out.println("Renderer version = " + c3dMap.get("native.version"));
    System.out.println("doubleBufferAvailable = " + c3dMap.get("doubleBufferAvailable"));
    System.out.println("stereoAvailable = " + c3dMap.get("stereoAvailable"));
    System.out.println("sceneAntialiasingAvailable = " + c3dMap.get("sceneAntialiasingAvailable"));
    System.out.println("sceneAntialiasingNumPasses = " + c3dMap.get("sceneAntialiasingNumPasses"));
    System.out.println("textureColorTableSize = " + c3dMap.get("textureColorTableSize"));
    System.out.println("textureEnvCombineAvailable = " + c3dMap.get("textureEnvCombineAvailable"));
    System.out.println("textureCombineDot3Available = " + c3dMap.get("textureCombineDot3Available"));
    System.out.println("textureCombineSubtractAvailable = " + c3dMap.get("textureCombineSubtractAvailable"));
    System.out.println("texture3DAvailable = " + c3dMap.get("texture3DAvailable"));
    System.out.println("textureCubeMapAvailable = " + c3dMap.get("textureCubeMapAvailable"));
    System.out.println("textureSharpenAvailable = " + c3dMap.get("textureSharpenAvailable"));
    System.out.println("textureDetailAvailable = " + c3dMap.get("textureDetailAvailable"));
    System.out.println("textureFilter4Available = " + c3dMap.get("textureFilter4Available"));
    System.out
            .println("textureAnisotropicFilterDegreeMax = " + c3dMap.get("textureAnisotropicFilterDegreeMax"));
    System.out.println("textureBoundaryWidthMax = " + c3dMap.get("textureBoundaryWidthMax"));
    System.out.println("textureWidthMax = " + c3dMap.get("textureWidthMax"));
    System.out.println("textureHeightMax = " + c3dMap.get("textureHeightMax"));
    System.out.println("textureLodOffsetAvailable = " + c3dMap.get("textureLodOffsetAvailable"));
    System.out.println("textureLodRangeAvailable = " + c3dMap.get("textureLodRangeAvailable"));
    System.out.println("textureUnitStateMax = " + c3dMap.get("textureUnitStateMax"));
    System.out.println(
            "compressedGeometry.majorVersionNumber = " + c3dMap.get("compressedGeometry.majorVersionNumber"));
    System.out.println(
            "compressedGeometry.minorVersionNumber = " + c3dMap.get("compressedGeometry.minorVersionNumber"));
    System.out.println("compressedGeometry.minorMinorVersionNumber = "
            + c3dMap.get("compressedGeometry.minorMinorVersionNumber"));

    System.exit(0);
}

From source file:Main.java

public static void main(String[] argv) throws Exception {
    Map objMap = new IdentityHashMap();

    Object o1 = new Integer(123);
    Object o2 = new Integer(123);
    objMap.put(o1, "first");
    objMap.put(o2, "second");

    Object v1 = objMap.get(o1); // first
    Object v2 = objMap.get(o2); // second
}

From source file:Main.java

public static void main(String[] argv) {

    Map<String, URL> urlMap = new HashMap<String, URL>();
    try {/*from  w  w  w.j a  va 2  s.co m*/
        urlMap.put("java", new URL("http://www.java2s.com"));
    } catch (MalformedURLException e) {
    }
    String s = urlMap.get("java").getHost();
}

From source file:Freq.java

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

    // Initialize frequency table from command line
    for (String a : args) {
        Integer freq = m.get(a);
        m.put(a, (freq == null) ? 1 : freq + 1);
    }/*from   ww  w.  j a v  a2s. c om*/

    System.out.println(m.size() + " distinct words:");
    System.out.println(m);
}