Java tutorial
/** * BlueCove - Java library for Bluetooth * Copyright (C) 2006-2008 Vlad Skarzhevskyy * * Licensed to the Apache Software Foundation (ASF) under one * or more contributor license agreements. See the NOTICE file * distributed with this work for additional information * regarding copyright ownership. The ASF licenses this file * to you under the Apache License, Version 2.0 (the * "License"); you may not use this file except in compliance * with the License. You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, * software distributed under the License is distributed on an * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY * KIND, either express or implied. See the License for the * specific language governing permissions and limitations * under the License. * * @author vlads * @version $Id: TimeUtils.java 2655 2008-12-24 16:04:37Z skarzhevskyy $ */ import java.util.Calendar; import java.util.Date; /** * */ public abstract class TimeUtils { private static Calendar singleCalendar; private static Date singleDate; public static String secSince(long start) { if (start == 0) { return "n/a"; } long msec = since(start); long sec = msec / 1000; long min = sec / 60; sec -= min * 60; long h = min / 60; min -= h * 60; StringBuffer sb; sb = new StringBuffer(); if (h != 0) { sb.append(StringUtils.d00((int) h)).append(":"); } if ((h != 0) || (min != 0)) { sb.append(StringUtils.d00((int) min)).append(":"); } sb.append(StringUtils.d00((int) sec)); if ((h == 0) && (min == 0)) { sb.append(" sec"); } if ((h == 0) && (min == 0) && (sec <= 1)) { msec -= 1000 * sec; sb.append(" "); sb.append(StringUtils.d000((int) msec)); sb.append(" msec"); } return sb.toString(); } public static long since(long start) { if (start == 0) { return 0; } return (System.currentTimeMillis() - start); } public static String bps(long size, long start) { long duration = TimeUtils.since(start); if (duration == 0) { return "n/a"; } long bps = ((1000 * 8 * size) / (duration)); return StringUtils.formatLong(bps) + " bit/s"; } public static String timeNowToString() { StringBuffer sb = new StringBuffer(); appendTime(sb, System.currentTimeMillis(), false); return sb.toString(); } public static String timeStampNowToString() { StringBuffer sb = new StringBuffer(); appendTime(sb, System.currentTimeMillis(), true); return sb.toString(); } public static StringBuffer appendTimeStampNow(StringBuffer sb, boolean millisecond) { return appendTime(sb, System.currentTimeMillis(), millisecond); } public static synchronized StringBuffer appendTime(StringBuffer sb, long timeStamp, boolean millisecond) { if (timeStamp == 0) { sb.append("n/a"); return sb; } if (singleCalendar == null) { singleCalendar = Calendar.getInstance(); singleDate = new Date(); } singleDate.setTime(timeStamp); singleCalendar.setTime(singleDate); StringUtils.appendD00(sb, singleCalendar.get(Calendar.HOUR_OF_DAY)).append(':'); StringUtils.appendD00(sb, singleCalendar.get(Calendar.MINUTE)).append(':'); StringUtils.appendD00(sb, singleCalendar.get(Calendar.SECOND)); if (millisecond) { sb.append('.'); StringUtils.appendD000(sb, singleCalendar.get(Calendar.MILLISECOND)); } return sb; } public static boolean sleep(long millis) { try { Thread.sleep(millis); return true; } catch (InterruptedException e) { return false; } } } /** * BlueCove - Java library for Bluetooth Copyright (C) 2006-2008 Vlad * Skarzhevskyy * * Licensed to the Apache Software Foundation (ASF) under one or more * contributor license agreements. See the NOTICE file distributed with this * work for additional information regarding copyright ownership. The ASF * licenses this file to you under the Apache License, Version 2.0 (the * "License"); you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the * License for the specific language governing permissions and limitations under * the License. * * @author vlads * @version $Id: StringUtils.java 2655 2008-12-24 16:04:37Z skarzhevskyy $ */ class StringUtils { public static boolean isStringSet(String str) { return ((str != null) && (str.length() > 0)); } /** * String.equalsIgnoreCase() was added only Since CLDC-1.1. * * @param anotherString * @return */ public static boolean equalsIgnoreCase(String s1, String s2) { if ((s1 == null) || (s2 == null)) { return false; } return (s1.length() == s2.length()) && (s1.toUpperCase().equals(s2.toUpperCase())); } public static String d00(int i) { if ((i > 9) || (i < 0)) { return String.valueOf(i); } else { return "0" + String.valueOf(i); } } public static StringBuffer appendD00(StringBuffer sb, int i) { if ((i > 9) || (i < 0)) { sb.append(String.valueOf(i)); } else { sb.append('0').append(String.valueOf(i)); } return sb; } public static String d000(int i) { if ((i > 99) || (i < 0)) { return String.valueOf(i); } else if (i > 9) { return "0" + String.valueOf(i); } else { return "00" + String.valueOf(i); } } public static StringBuffer appendD000(StringBuffer sb, int i) { if ((i > 99) || (i < 0)) { sb.append(String.valueOf(i)); } else if (i > 9) { sb.append('0').append(String.valueOf(i)); } else { sb.append('0').append('0').append(String.valueOf(i)); } return sb; } public static String d0000(int i) { if ((i > 999) || (i < 0)) { return String.valueOf(i); } else if (i > 99) { return "00" + String.valueOf(i); } else if (i > 9) { return "00" + String.valueOf(i); } else { return "000" + String.valueOf(i); } } public static String formatLong(long l) { if (l < 1000) { return Long.toString(l); } long l1K = (l / 1000); if (l1K < 1000) { return Long.toString(l1K) + "," + StringUtils.d000((int) (l - 1000L * l1K)); } else { long l1M = (l1K / 1000); return Long.toString(l1M) + "," + StringUtils.d000((int) (l1K - 1000L * l1M)) + "," + StringUtils.d000((int) (l - 1000L * l1K)); } } public static String toHex00String(int c) { String s = Integer.toHexString(c); if (s.length() == 1) { return "0" + s; } else { return s; } } public static String padRight(String str, int length, char c) { int l = str.length(); if (l >= length) { return str; } StringBuffer sb = new StringBuffer(); sb.append(str); for (int i = l; i < length; i++) { sb.append(c); } return sb.toString(); } public static char printable(char c) { if (c < ' ') { return ' '; } else { return c; } } public static String toBinaryText(StringBuffer buf) { boolean bufHasBinary = false; int len = buf.length(); for (int i = 0; i < len; i++) { if (buf.charAt(i) < ' ') { bufHasBinary = true; break; } } if (bufHasBinary) { StringBuffer formatedDataBuf = new StringBuffer(); for (int k = 0; k < len; k++) { formatedDataBuf.append(printable(buf.charAt(k))); } formatedDataBuf.append(" 0x["); for (int k = 0; k < len; k++) { formatedDataBuf.append(toHex00String(buf.charAt(k))).append(' '); } formatedDataBuf.append("]"); buf = formatedDataBuf; } return buf.toString(); } }