Example usage for java.util LinkedList addLast

Introduction

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

Prototype

public void addLast(E e) 

Source Link

Document

Appends the specified element to the end of this list.

Usage

From source file:Main.java

public static void main(String args[]) {

    LinkedList<String> ll = new LinkedList<String>();

    ll.add("B");//from   w  w  w  .j  a  va 2 s. c o m
    ll.add("ja v a2s.com");
    ll.addLast("E");
    ll.add("F");

    LinkedList<String> newList = new LinkedList<String>(ll);

    System.out.println(newList);
}

---

From source file:Main.java

public static void main(String args[]) {
    LinkedList<String> ll = new LinkedList<String>();

    ll.add("A");/*  w  w  w  .java  2  s  .c  o m*/
    ll.add("ja v a2s.com");
    ll.addLast("B");
    ll.add("C");

    Iterator<String> itr = ll.iterator();
    while (itr.hasNext()) {
        String element = itr.next();
        System.out.print(element + " ");
    }
}

---

From source file:MainClass.java

public static void main(String[] a) {

    LinkedList list = new LinkedList();
    list.add("A");
    list.add("B");
    list.add("C");
    list.add("D");
    list.addFirst("X");
    list.addLast("Z");

    System.out.println(list);/*from   w ww .  jav  a  2  s  .c om*/
}

---

From source file:MainClass.java

public static void main(String[] a) {

    LinkedList list = new LinkedList();

    list.add("A");
    list.add("B");
    list.add("C");
    list.add("D");
    list.addFirst("X");
    list.addLast("Z");

    System.out.println(list);//  w  ww  .j  a v a2s  .co m
    System.out.println(list.getFirst());
    System.out.println(list.getLast());
}

---

From source file:MainClass.java

public static void main(String[] a) {

    LinkedList list = new LinkedList();
    list.add("A");
    list.add("B");
    list.add("C");
    list.add("D");
    list.addFirst("X");
    list.addLast("Z");

    System.out.println(list);/*from ww w  . j  a  v  a2s .c  o m*/
    System.out.println(list.getFirst());
    System.out.println(list.getLast());

    list.removeFirst();
    list.removeLast();

    System.out.println(list);
}

---

From source file:MainClass.java

public static void main(String args[]) {

    LinkedList<String> ll = new LinkedList<String>();

    ll.add("B");/*from w w  w .  j  a  v  a 2s.  c o  m*/
    ll.add("C");
    ll.add("D");
    ll.add("E");
    ll.add("F");
    ll.addLast("Z");
    ll.addFirst("A");

    ll.add(1, "A2");

    System.out.println("Original contents of ll: " + ll);

    ll.remove("F");
    ll.remove(2);

    System.out.println("Contents of ll after deletion: " + ll);

    ll.removeFirst();
    ll.removeLast();

    System.out.println("ll after deleting first and last: " + ll);

    String val = ll.get(2);
    ll.set(2, val + " Changed");

    System.out.println("ll after change: " + ll);
}

---

From source file:Main.java

public static void main(String[] args) {
    LinkedList<String> lList = new LinkedList<String>();
    lList.add("1");
    lList.add("2");
    lList.add("3");
    lList.add("4");
    lList.add("5");

    System.out.println(lList);/* w  w w. ja  v  a  2  s . com*/
    lList.addFirst("0");
    System.out.println(lList);
    lList.addLast("6");
    System.out.println(lList);
}

---

From source file:Main.java

public static void main(String[] args) {

    // create a LinkedList
    LinkedList<String> list = new LinkedList<String>();

    // add some elements
    list.add("Hello");
    list.add("from java2s.com");
    list.add("10");

    // print the list
    System.out.println("LinkedList:" + list);

    // add a new element at the end of the list
    list.addLast("Element");

    // print the new list
    System.out.println("LinkedList:" + list);
}

---

From source file:com.alibaba.rocketmq.example.benchmark.Consumer.java

public static void main(String[] args) throws MQClientException {
    Options options = ServerUtil.buildCommandlineOptions(new Options());
    CommandLine commandLine = ServerUtil.parseCmdLine("benchmarkConsumer", args,
            buildCommandlineOptions(options), new PosixParser());
    if (null == commandLine) {
        System.exit(-1);//from   w  ww. ja v a 2 s  . c o m
    }

    final String topic = commandLine.hasOption('t') ? commandLine.getOptionValue('t').trim() : "BenchmarkTest";
    final String groupPrefix = commandLine.hasOption('g') ? commandLine.getOptionValue('g').trim()
            : "benchmark_consumer";
    final String isPrefixEnable = commandLine.hasOption('p') ? commandLine.getOptionValue('p').trim() : "true";
    String group = groupPrefix;
    if (Boolean.parseBoolean(isPrefixEnable)) {
        group = groupPrefix + "_" + Long.toString(System.currentTimeMillis() % 100);
    }

    System.out.printf("topic %s group %s prefix %s%n", topic, group, isPrefixEnable);

    final StatsBenchmarkConsumer statsBenchmarkConsumer = new StatsBenchmarkConsumer();

    final Timer timer = new Timer("BenchmarkTimerThread", true);

    final LinkedList<Long[]> snapshotList = new LinkedList<Long[]>();

    timer.scheduleAtFixedRate(new TimerTask() {
        @Override
        public void run() {
            snapshotList.addLast(statsBenchmarkConsumer.createSnapshot());
            if (snapshotList.size() > 10) {
                snapshotList.removeFirst();
            }
        }
    }, 1000, 1000);

    timer.scheduleAtFixedRate(new TimerTask() {
        private void printStats() {
            if (snapshotList.size() >= 10) {
                Long[] begin = snapshotList.getFirst();
                Long[] end = snapshotList.getLast();

                final long consumeTps = (long) (((end[1] - begin[1]) / (double) (end[0] - begin[0])) * 1000L);
                final double averageB2CRT = (end[2] - begin[2]) / (double) (end[1] - begin[1]);
                final double averageS2CRT = (end[3] - begin[3]) / (double) (end[1] - begin[1]);

                System.out.printf(
                        "Consume TPS: %d Average(B2C) RT: %7.3f Average(S2C) RT: %7.3f MAX(B2C) RT: %d MAX(S2C) RT: %d%n",
                        consumeTps, averageB2CRT, averageS2CRT, end[4], end[5]);
            }
        }

        @Override
        public void run() {
            try {
                this.printStats();
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
    }, 10000, 10000);

    DefaultMQPushConsumer consumer = new DefaultMQPushConsumer(group);
    consumer.setInstanceName(Long.toString(System.currentTimeMillis()));

    consumer.subscribe(topic, "*");

    consumer.registerMessageListener(new MessageListenerConcurrently() {
        @Override
        public ConsumeConcurrentlyStatus consumeMessage(List<MessageExt> msgs,
                ConsumeConcurrentlyContext context) {
            MessageExt msg = msgs.get(0);
            long now = System.currentTimeMillis();

            statsBenchmarkConsumer.getReceiveMessageTotalCount().incrementAndGet();

            long born2ConsumerRT = now - msg.getBornTimestamp();
            statsBenchmarkConsumer.getBorn2ConsumerTotalRT().addAndGet(born2ConsumerRT);

            long store2ConsumerRT = now - msg.getStoreTimestamp();
            statsBenchmarkConsumer.getStore2ConsumerTotalRT().addAndGet(store2ConsumerRT);

            compareAndSetMax(statsBenchmarkConsumer.getBorn2ConsumerMaxRT(), born2ConsumerRT);

            compareAndSetMax(statsBenchmarkConsumer.getStore2ConsumerMaxRT(), store2ConsumerRT);

            return ConsumeConcurrentlyStatus.CONSUME_SUCCESS;
        }
    });

    consumer.start();

    System.out.printf("Consumer Started.%n");
}

---

From source file:it.unipd.dei.ims.falcon.CmdLine.java

public static void main(String[] args) {

    // last argument is always index path
    Options options = new Options();
    // one of these actions has to be specified
    OptionGroup actionGroup = new OptionGroup();
    actionGroup.addOption(new Option("i", true, "perform indexing")); // if dir, all files, else only one file
    actionGroup.addOption(new Option("q", true, "perform a single query"));
    actionGroup.addOption(new Option("b", false, "perform a query batch (read from stdin)"));
    actionGroup.setRequired(true);//www  . ja v  a 2 s  . co  m
    options.addOptionGroup(actionGroup);

    // other options
    options.addOption(new Option("l", "segment-length", true, "length of a segment (# of chroma vectors)"));
    options.addOption(
            new Option("o", "segment-overlap", true, "overlap portion of a segment (# of chroma vectors)"));
    options.addOption(new Option("Q", "quantization-level", true, "quantization level for chroma vectors"));
    options.addOption(new Option("k", "min-kurtosis", true, "minimum kurtosis for indexing chroma vectors"));
    options.addOption(new Option("s", "sub-sampling", true, "sub-sampling of chroma features"));
    options.addOption(new Option("v", "verbose", false, "verbose output (including timing info)"));
    options.addOption(new Option("T", "transposition-estimator-strategy", true,
            "parametrization for the transposition estimator strategy"));
    options.addOption(new Option("t", "n-transp", true,
            "number of transposition; if not specified, no transposition is performed"));
    options.addOption(new Option("f", "force-transp", true, "force transposition by an amount of semitones"));
    options.addOption(new Option("p", "pruning", false,
            "enable query pruning; if -P is unspecified, use default strategy"));
    options.addOption(new Option("P", "pruning-custom", true, "custom query pruning strategy"));

    // parse
    HelpFormatter formatter = new HelpFormatter();
    CommandLineParser parser = new PosixParser();
    CommandLine cmd = null;
    try {
        cmd = parser.parse(options, args);
        if (cmd.getArgs().length != 1)
            throw new ParseException("no index path was specified");
    } catch (ParseException ex) {
        System.err.println("ERROR - parsing command line:");
        System.err.println(ex.getMessage());
        formatter.printHelp("falcon -{i,q,b} [options] index_path", options);
        return;
    }

    // default values
    final float[] DEFAULT_TRANSPOSITION_ESTIMATOR_STRATEGY = new float[] { 0.65192807f, 0.0f, 0.0f, 0.0f,
            0.3532628f, 0.4997167f, 0.0f, 0.41703504f, 0.0f, 0.16297342f, 0.0f, 0.0f };
    final String DEFAULT_QUERY_PRUNING_STRATEGY = "ntf:0.340765*[0.001694,0.995720];ndf:0.344143*[0.007224,0.997113];"
            + "ncf:0.338766*[0.001601,0.995038];nmf:0.331577*[0.002352,0.997884];"; // TODO not the final one

    int hashes_per_segment = Integer.parseInt(cmd.getOptionValue("l", "150"));
    int overlap_per_segment = Integer.parseInt(cmd.getOptionValue("o", "50"));
    int nranks = Integer.parseInt(cmd.getOptionValue("Q", "3"));
    int subsampling = Integer.parseInt(cmd.getOptionValue("s", "1"));
    double minkurtosis = Float.parseFloat(cmd.getOptionValue("k", "-100."));
    boolean verbose = cmd.hasOption("v");
    int ntransp = Integer.parseInt(cmd.getOptionValue("t", "1"));
    TranspositionEstimator tpe = null;
    if (cmd.hasOption("t")) {
        if (cmd.hasOption("T")) {
            // TODO this if branch is yet to test
            Pattern p = Pattern.compile("\\d\\.\\d*");
            LinkedList<Double> tokens = new LinkedList<Double>();
            Matcher m = p.matcher(cmd.getOptionValue("T"));
            while (m.find())
                tokens.addLast(new Double(cmd.getOptionValue("T").substring(m.start(), m.end())));
            float[] strategy = new float[tokens.size()];
            if (strategy.length != 12) {
                System.err.println("invalid transposition estimator strategy");
                System.exit(1);
            }
            for (int i = 0; i < strategy.length; i++)
                strategy[i] = new Float(tokens.pollFirst());
        } else {
            tpe = new TranspositionEstimator(DEFAULT_TRANSPOSITION_ESTIMATOR_STRATEGY);
        }
    } else if (cmd.hasOption("f")) {
        int[] transps = parseIntArray(cmd.getOptionValue("f"));
        tpe = new ForcedTranspositionEstimator(transps);
        ntransp = transps.length;
    }
    QueryPruningStrategy qpe = null;
    if (cmd.hasOption("p")) {
        if (cmd.hasOption("P")) {
            qpe = new StaticQueryPruningStrategy(cmd.getOptionValue("P"));
        } else {
            qpe = new StaticQueryPruningStrategy(DEFAULT_QUERY_PRUNING_STRATEGY);
        }
    }

    // action
    if (cmd.hasOption("i")) {
        try {
            Indexing.index(new File(cmd.getOptionValue("i")), new File(cmd.getArgs()[0]), hashes_per_segment,
                    overlap_per_segment, subsampling, nranks, minkurtosis, tpe, verbose);
        } catch (IndexingException ex) {
            Logger.getLogger(CmdLine.class.getName()).log(Level.SEVERE, null, ex);
        } catch (IOException ex) {
            Logger.getLogger(CmdLine.class.getName()).log(Level.SEVERE, null, ex);
        }
    }
    if (cmd.hasOption("q")) {
        String queryfilepath = cmd.getOptionValue("q");
        doQuery(cmd, queryfilepath, hashes_per_segment, overlap_per_segment, nranks, subsampling, tpe, ntransp,
                minkurtosis, qpe, verbose);
    }
    if (cmd.hasOption("b")) {
        try {
            long starttime = System.currentTimeMillis();
            BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
            String line = null;
            while ((line = in.readLine()) != null && !line.trim().isEmpty())
                doQuery(cmd, line, hashes_per_segment, overlap_per_segment, nranks, subsampling, tpe, ntransp,
                        minkurtosis, qpe, verbose);
            in.close();
            long endtime = System.currentTimeMillis();
            System.out.println(String.format("total time: %ds", (endtime - starttime) / 1000));
        } catch (IOException ex) {
            Logger.getLogger(CmdLine.class.getName()).log(Level.SEVERE, null, ex);
        }
    }
}

---

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