List of usage examples for java.util Random nextInt
public int nextInt(int bound)
From source file:edu.umn.cs.sthadoop.operations.HSPKNNQ.java
public static void main(String[] args) throws IOException { //./hadoop jar /export/scratch/louai/idea-stHadoop/st-hadoop-uber.jar pknn /mntgIndex/yyyy-MM-dd/2017-08-03 /pknn k:2 point:-78.9659,35.7998 shape:edu.umn.cs.sthadoop.mntg.STPointMntg -overwrite // args = new String[8]; // args[0] = "/export/scratch/mntgData/mntgIndex"; // args[1] = "/export/scratch/mntgData/pknn"; // args[2] = "-overwrite"; // args[3] = "k:10"; // args[4] = "point:-78.9659063204100,35.7903907684998"; // args[5] = "shape:edu.umn.cs.sthadoop.trajectory.STPointTrajectory"; // args[6] = "interval:2017-08-03,2017-08-04"; // args[7] = "-overwrite"; final OperationsParams params = new OperationsParams(new GenericOptionsParser(args)); Path[] paths = params.getPaths(); if (paths.length <= 1 && !params.checkInput()) { printUsage();/* w w w. ja va2 s . c o m*/ System.exit(1); } if (paths.length > 1 && !params.checkInputOutput()) { printUsage(); System.exit(1); } if (params.get("interval") == null) { System.err.println("Temporal range missing"); printUsage(); System.exit(1); } TextSerializable inObj = params.getShape("shape"); if (!(inObj instanceof STPoint)) { if (!(inObj instanceof STRectangle)) { LOG.error("Shape is not instance of STPoint or instance of STRectangle"); printUsage(); System.exit(1); } } // path to the spatio-temporal index. List<Path> STPaths = new ArrayList<Path>(); try { STPaths = STRangeQuery.getIndexedSlices(params); } catch (Exception e1) { // TODO Auto-generated catch block e1.printStackTrace(); } for (Path input : STPaths) { final Path inputFile = input; int count = params.getInt("count", 1); double closeness = params.getFloat("closeness", -1.0f); final Point[] queryPoints = closeness < 0 ? params.getShapes("point", new Point()) : new Point[count]; final FileSystem fs = inputFile.getFileSystem(params); final int k = params.getInt("k", 1); int concurrency = params.getInt("concurrency", 100); if (k == 0) { LOG.warn("k = 0"); } if (queryPoints.length == 0) { printUsage(); throw new RuntimeException("Illegal arguments"); } final Path outputPath = paths.length > 1 ? new Path(paths[1].toUri() + "-" + input.getName()) : null; if (closeness >= 0) { // Get query points according to its closeness to grid intersections GlobalIndex<Partition> gindex = SpatialSite.getGlobalIndex(fs, inputFile); long seed = params.getLong("seed", System.currentTimeMillis()); Random random = new Random(seed); for (int i = 0; i < count; i++) { int i_block = random.nextInt(gindex.size()); int direction = random.nextInt(4); // Generate a point in the given direction // Get center point (x, y) Iterator<Partition> iterator = gindex.iterator(); while (i_block-- >= 0) iterator.next(); Partition partition = iterator.next(); double cx = (partition.x1 + partition.x2) / 2; double cy = (partition.y1 + partition.y2) / 2; double cw = partition.x2 - partition.x1; double ch = partition.y2 - partition.y1; int signx = ((direction & 1) == 0) ? 1 : -1; int signy = ((direction & 2) == 1) ? 1 : -1; double x = cx + cw * closeness / 2 * signx; double y = cy + ch * closeness / 2 * signy; queryPoints[i] = new Point(x, y); } } final BooleanWritable exceptionHappened = new BooleanWritable(); Thread.UncaughtExceptionHandler h = new Thread.UncaughtExceptionHandler() { public void uncaughtException(Thread th, Throwable ex) { ex.printStackTrace(); exceptionHappened.set(true); } }; // Run each query in a separate thread final Vector<Thread> threads = new Vector<Thread>(); for (int i = 0; i < queryPoints.length; i++) { Thread thread = new Thread() { @Override public void run() { try { Point query_point = queryPoints[threads.indexOf(this)]; OperationsParams newParams = new OperationsParams(params); OperationsParams.setShape(newParams, "point", query_point); Job job = knn(inputFile, outputPath, params); } catch (IOException e) { e.printStackTrace(); } catch (InterruptedException e) { e.printStackTrace(); } catch (ClassNotFoundException e) { e.printStackTrace(); } } }; thread.setUncaughtExceptionHandler(h); threads.add(thread); } long t1 = System.currentTimeMillis(); do { // Ensure that there is at least MaxConcurrentThreads running int i = 0; while (i < concurrency && i < threads.size()) { Thread.State state = threads.elementAt(i).getState(); if (state == Thread.State.TERMINATED) { // Thread already terminated, remove from the queue threads.remove(i); } else if (state == Thread.State.NEW) { // Start the thread and move to next one threads.elementAt(i++).start(); } else { // Thread is still running, skip over it i++; } } if (!threads.isEmpty()) { try { // Sleep for 10 seconds or until the first thread terminates threads.firstElement().join(10000); } catch (InterruptedException e) { e.printStackTrace(); } } } while (!threads.isEmpty()); long t2 = System.currentTimeMillis(); if (exceptionHappened.get()) throw new RuntimeException("Not all jobs finished correctly"); System.out.println("Time for " + queryPoints.length + " jobs is " + (t2 - t1) + " millis"); System.out.println("Total iterations: " + TotalIterations); } }
From source file:com.asquareb.kaaval.MachineKey.java
/** * Main method to execute as a command line utility. Provides the option to * encrypt a string, decrypt a encrypted string or exit from the program *///from w ww . j av a 2 s.c o m public static void main(String[] args) { String originalPassword = null; String encryptedPassword = null; try { final BufferedReader cin = new BufferedReader(new InputStreamReader(System.in)); System.out.print("Enter E - Encrypt,D - Decrypt,X - Exit :"); final String choice = cin.readLine(); final Random rand = new Random(); boolean phraseCorrect = false; String app = null; if (choice.equalsIgnoreCase("E")) { System.out.print("Enter the string to encrypt :"); originalPassword = cin.readLine(); System.out.println("Choose a phrase of min 8 chars in length "); System.out.println(" Also the password should include 2 Cap,"); System.out.println(" 2 small letters,2 numeric and 2 non alpha numeric chars"); while (!phraseCorrect) { System.out.print("Enter a phrase to encrypt :"); password = cin.readLine().toCharArray(); phraseCorrect = PasswordRules.verifyPassword(password); } System.out.print("Enter application code :"); app = cin.readLine(); app += (rand.nextInt(10000)); encryptedPassword = encrypt(originalPassword, app); System.out.println("Encrypted password :" + encryptedPassword); System.out.println("Key stored in :" + app); System.out.println("*** Provide the encrypted string to app team"); System.out.println("*** Store the key file in a secure durectory"); System.out.println("*** Inform the key file name and location to app team"); } else if (choice.equalsIgnoreCase("D")) { System.out.print("Enter the string to Decrypt :"); encryptedPassword = cin.readLine(); System.out.print("Enter the name of key file :"); app = cin.readLine(); final String decryptedPassword = decrypt(encryptedPassword, app); System.out.print("Decrypted string :" + decryptedPassword); } return; } catch (KaavalException e) { e.PrintProtectException(); } catch (Exception e) { e.printStackTrace(); } }
From source file:com.yahoo.ycsb.db.AsyncHBaseClient.java
public static void main(String[] args) { if (args.length != 4) { System.out.println("usage: ahc zkquorum zkpath threadcount operation_count"); System.exit(0);//from w ww. j a v a 2 s. c o m } final int keyspace = 10000; //120000000; final String zkQuorum = args[0]; final String zkPath = args[1]; final int threadcount = Integer.parseInt(args[2]); final int opcount = Integer.parseInt(args[3]) / threadcount; Vector<Thread> allthreads = new Vector<Thread>(); for (int i = 0; i < threadcount; i++) { Thread t = new Thread() { public void run() { try { Random random = new Random(); AsyncHBaseClient cli = new AsyncHBaseClient(); Properties props = new Properties(); props.setProperty("columnfamily", "f1"); props.setProperty("zkquorum", zkQuorum); props.setProperty("zkpath", zkPath); props.setProperty("debug", "true"); cli.setProperties(props); cli.init(); HashMap<String, ByteIterator> result = Maps.newHashMap(); long accum = 0; for (int i = 0; i < opcount; i++) { int keynum = random.nextInt(keyspace); String key = "user" + keynum; long st = System.currentTimeMillis(); int rescode; HashMap<String, ByteIterator> hm = Maps.newHashMap(); hm.put("field1", new ByteArrayByteIterator("value1".getBytes("UTF-8"))); hm.put("field2", new ByteArrayByteIterator("value2".getBytes("UTF-8"))); hm.put("field3", new ByteArrayByteIterator("value3".getBytes("UTF-8"))); hm.put("efield", new ByteArrayByteIterator(HBaseClient.EMPTY_ARRAY)); rescode = cli.insert("bench", key, hm); HashSet<String> s = Sets.newHashSet(); s.add("field1"); s.add("field2"); rescode = cli.read("bench", key, s, result); rescode = cli.delete("bench", key); rescode = cli.read("bench", key, s, result); HashSet<String> scanFields = Sets.newHashSet(); scanFields.add("field1"); scanFields.add("field3"); Vector<HashMap<String, ByteIterator>> scanResults = new Vector<HashMap<String, ByteIterator>>(); rescode = cli.scan("bench", "user2", 20, null, scanResults); long en = System.currentTimeMillis(); accum += (en - st); if (rescode != Ok) { System.out.println("Error " + rescode + " for " + key); } if (i % 10 == 0) { System.out.println( i + " operations, average latency: " + (((double) accum) / ((double) i))); } } System.out.println(new ToStringBuilder(cli._client.stats(), ToStringStyle.MULTI_LINE_STYLE) .toString()); } catch (Exception e) { e.printStackTrace(); } } }; allthreads.add(t); } long st = System.currentTimeMillis(); for (Thread t : allthreads) { t.start(); } for (Thread t : allthreads) { try { t.join(); } catch (InterruptedException e) { } } long en = System.currentTimeMillis(); System.out.println("Throughput: " + ((1000.0) * (((double) (opcount * threadcount)) / ((double) (en - st)))) + " ops/sec"); }
From source file:com.glaf.core.util.StringTools.java
public static void main(String[] args) { String text = "123,234,345,567,789"; List<String> rows = StringTools.split(text, ","); System.out.println(rows.get(2)); System.out.println(rows);/*from ww w . j a v a2s . com*/ for (int i = 0, len = rows.size(); i < len; i++) { System.out.println(rows.get(i)); } Set<String> x = new HashSet<String>(); for (int i = 0; i < 9999; i++) { String str = StringTools.random(); x.add(str); System.out.println(str); } System.out.println("size=" + x.size()); Random random = new Random(); for (int i = 1; i < 100; i++) { int k = Math.abs(random.nextInt(9999)); int a = String.valueOf(k).length(); int b = String.valueOf(9999).length(); System.out.println("a=" + a); System.out.println("b=" + b); String xx = ""; if (a != b) { for (int j = 0; j < (b - a); j++) { xx = "0" + xx; } } xx = xx + k; System.out.println(xx); } System.out.println(toUnderLineName("ISOCertifiedStaff")); System.out.println(toUnderLineName("CertifiedStaff")); System.out.println(toUnderLineName("UserID")); System.out.println(toCamelCase("iso_certified_staff")); System.out.println(toCamelCase("certified_staff")); System.out.println(toCamelCase("user_id")); }
From source file:com.yahoo.pasc.paxos.client.PaxosClient.java
public static void main(String[] args) throws Exception { CommandLineParser parser = new PosixParser(); Options options;//from ww w .j a v a 2s. c om { Option id = new Option("i", true, "client id"); Option clients = new Option("c", true, "number of clients"); Option host = new Option("l", true, "leader (hostname:port)"); Option servers = new Option("s", true, "number of servers"); Option quorum = new Option("q", true, "necesarry quorum at the client"); Option port = new Option("p", true, "port used by client"); Option buffer = new Option("b", true, "number of concurrent clients"); Option timeout = new Option("t", true, "timeout in milliseconds"); Option udp = new Option("u", false, "use UDP"); Option zookeeper = new Option("z", true, "zookeeper connection string"); Option warmup = new Option("w", true, "warmup messagges"); Option measuring = new Option("m", true, "measuring time"); Option request = new Option("r", true, "request size"); Option frequency = new Option("f", true, "frequency of throughput info"); Option anm = new Option("a", false, "use protection"); Option inlineThresh = new Option("n", true, "threshold for sending requests iNline with accepts "); Option asynSize = new Option("y", true, "size of async messages queue"); options = new Options(); options.addOption(id).addOption(host).addOption(servers).addOption(quorum).addOption(port) .addOption(warmup).addOption(buffer).addOption(timeout).addOption(udp).addOption(zookeeper) .addOption(clients).addOption(measuring).addOption(request).addOption(frequency).addOption(anm) .addOption(inlineThresh).addOption(asynSize); } CommandLine line = null; try { line = parser.parse(options, args); String host = line.hasOption('l') ? line.getOptionValue('l') : "localhost:20548,localhost:20748,localhost:20778"; String zkConnection = line.hasOption('z') ? line.getOptionValue('z') : "localhost:2181"; int clientIds = line.hasOption('i') ? Integer.parseInt(line.getOptionValue('i')) : 0; int servers = line.hasOption('s') ? Integer.parseInt(line.getOptionValue('s')) : 3; int quorum = line.hasOption('q') ? Integer.parseInt(line.getOptionValue('q')) : 1; int buffer = line.hasOption('b') ? Integer.parseInt(line.getOptionValue('b')) : 1; int timeout = line.hasOption('t') ? Integer.parseInt(line.getOptionValue('t')) : 5000; int clients = line.hasOption('c') ? Integer.parseInt(line.getOptionValue('c')) : 1; int requestSize = line.hasOption('r') ? Integer.parseInt(line.getOptionValue('r')) : 0; int inlineThreshold = line.hasOption('n') ? Integer.parseInt(line.getOptionValue('n')) : 1000; int asynSize = line.hasOption('y') ? Integer.parseInt(line.getOptionValue('y')) : 100; boolean protection = line.hasOption('a'); int threads = Runtime.getRuntime().availableProcessors() * 2; final ExecutionHandler executor = new ExecutionHandler(new OrderedMemoryAwareThreadPoolExecutor(threads, 1024 * 1024, 1024 * 1024 * 1024, 30, TimeUnit.SECONDS, Executors.defaultThreadFactory())); String[] serverHosts = host.split(","); ServerHelloHandler shello = new ServerHelloHandler(); ReplyHandler reply = new ReplyHandler(); SubmitHandler submit = new SubmitHandler(); TimeoutHandler tout = new TimeoutHandler(); AsyncMessageHandler asyncm = new AsyncMessageHandler(); ByeHandler bye = new ByeHandler(); HelloHandler hello = new HelloHandler(); Random rnd = new Random(); for (int i = 0; i < buffer; ++i) { ClientState clientState = new ClientState(servers, quorum, inlineThreshold, asynSize); final PascRuntime<ClientState> runtime = new PascRuntime<ClientState>(protection); runtime.setState(clientState); runtime.addHandler(ServerHello.class, shello); runtime.addHandler(Reply.class, reply); runtime.addHandler(Submit.class, submit); runtime.addHandler(Timeout.class, tout); runtime.addHandler(AsyncMessage.class, asyncm); runtime.addHandler(Bye.class, bye); runtime.addHandler(Hello.class, hello); final PaxosClientHandler handler = new PaxosClientHandler(runtime, new SimpleClient(requestSize), serverHosts, clients, timeout, zkConnection, executor); if (line.hasOption('w')) handler.setWarmup(Integer.parseInt(line.getOptionValue('w'))); if (line.hasOption('m')) handler.setMeasuringTime(Integer.parseInt(line.getOptionValue('m'))); if (line.hasOption('f')) handler.setPeriod(Integer.parseInt(line.getOptionValue('f'))); handler.start(); Thread.sleep(rnd.nextInt(200)); } } catch (Exception e) { System.err.println("Unexpected exception " + e); e.printStackTrace(); HelpFormatter formatter = new HelpFormatter(); formatter.printHelp("Paxos", options); System.exit(-1); } }
From source file:knop.psfj.FovDataSet.java
/** * The main method./* w w w .j av a 2s.c om*/ * * @param args the arguments */ public static void main(String[] args) { FovDataSet fdt = new FovDataSet(); FovDataSet fdt2 = new FovDataSet(); Random rn = new Random(); /* * for (int i = 0; i != 10; i++) { fdt.addValue("bead", rn.nextInt(15)); * fdt.addValue("x", rn.nextDouble()); fdt.addValue("y", rn.nextDouble()); * fdt.addValue("z", rn.nextDouble()); * * fdt.addValue("fwhmX", rn.nextDouble() * 3); fdt.addValue("fwhmY", * rn.nextDouble() * 2); fdt.addValue("fwhmZ", rn.nextDouble() * 5); } */ for (int i = 0; i != 10; i++) { // fdt.addValue("Index",i); fdt.addValue("xSource", rn.nextInt(100)); fdt2.addValue("xSource", rn.nextDouble() * 200); fdt.addValue("xTarget", rn.nextInt(100)); fdt2.addValue("xTarget", rn.nextInt(200)); fdt.addValue("a name", "toi"); fdt2.addValue("a name", "et moi"); } fdt.setSeparator("\t"); System.out.println(fdt.getColumnStatistics("xSource")); fdt.mergeDataSet(fdt2); System.out.println(fdt.exportToString()); //fdt.exportToCrappyFormat("/home/cyril/test.xls"); }
From source file:Main.java
public static int getRandom(int minNumber, int maxNumber) { Random rand = new Random(); int randomNum = rand.nextInt(maxNumber - minNumber); return randomNum; }
From source file:Main.java
public static <E> E sample(List<E> l, Random r) { int i = r.nextInt(l.size()); return l.get(i); }
From source file:Main.java
public static Color randomColor(Random r) { return new Color(r.nextInt(127) + 127, r.nextInt(127) + 127, r.nextInt(127) + 127); }
From source file:Main.java
public static int throwDice() { Random r = new Random(); return r.nextInt(6) + 1; //0~5 + 1 = 1~6 }