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kevinobamakevinobama
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‎bin/.gitignore

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/kevinCollection/
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/kevinGates/
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/kevinRedis/

‎src/kevinGates/HashMapExample.java

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package kevinGates;
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import java.util.HashMap;
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import java.util.Map;
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public class HashMapExample {
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public static void main(String args[]) {
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hashMapExampleOne();
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}
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public static void hashMapExampleOne() {
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Map<Integer, String> users = new HashMap<Integer, String>();
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Map<Integer, String> usersClone = new HashMap<Integer, String>();
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users.put(1, "kevingates");
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users.put(2, "billgates");
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users.put(3, "obama");
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System.out.println(users);
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System.out.println(users.get(2));
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users.remove(3);
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System.out.println(users.get(3));
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users.clear();
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System.out.println(users.get(1));
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}
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}

‎src/kevinGates/StringExample.java

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package kevinGates;
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public class StringExample {
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public static void main(String[] args) {
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// TODO Auto-generated method stub
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String Str = new String("{ref_1=0.1, ref_2=0.2}");
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System.out.println(replaceExample(Str));
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}
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public static String replaceExample(String stringData) {
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stringData = stringData.replace('{', ' ');
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stringData = stringData.replace('}', ' ');
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return stringData;
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}
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}

‎src/kevinGates/UnixTimeExample.java

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package kevinGates;
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import java.util.*;
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import java.text.SimpleDateFormat;
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import java.text.DateFormat;
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public class UnixTimeExample {
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//yyyy-MM-dd HH:mm:ss
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private static final DateFormat dateFormatMinute = new SimpleDateFormat("dd HH:mm");
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public static void main(String[] args) {
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//two();
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//doCalendarTwo();
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//dateExample();
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System.out.println(getMinutesOneDayOne());
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}
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public static void one(String[] args) {
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long unixTime = System.currentTimeMillis() / 1000L;
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int k=1;
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ArrayList minutesArray = new ArrayList();
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k=1;
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while(k<=100) {
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minutesArray.add(unixTime);
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k++;
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}
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Map<String, ArrayList> mapMinutes = new HashMap<String, ArrayList>();
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mapMinutes.put("minutes", minutesArray);
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System.out.println(mapMinutes);
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}
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public static void two() {
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long unixTime = System.currentTimeMillis() / 1000L;
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int k=1;
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ArrayList minutesArray = new ArrayList();
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k=1;
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while(k<=24) {
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minutesArray.add(k+":00");
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minutesArray.add(k+":15");
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minutesArray.add(k+":30");
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minutesArray.add(k+":45");
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k++;
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}
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Map<String, ArrayList> mapMinutes = new HashMap<String, ArrayList>();
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mapMinutes.put("minutes", minutesArray);
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System.out.println(mapMinutes);
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}
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public static String getDateTimePlusMinute(int minutes) {
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Date currentDate = new Date();
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Calendar calendar = Calendar.getInstance();
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calendar.setTime(currentDate);
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calendar.add(Calendar.MINUTE, minutes);
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return dateFormatMinute.format(calendar.getTime());
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}
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public static void doCalendar() {
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Calendar cal = GregorianCalendar.getInstance();
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System.out.println("Minutes : "+ cal.get(Calendar.MINUTE));
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System.out.println("Seconds :" + cal.get(Calendar.SECOND));
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//cal.add(Calendar.SECOND, 50);
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cal.add(Calendar.MINUTE, 2);
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System.out.println("Minutes : "+ cal.get(Calendar.MINUTE));
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System.out.println("Seconds :" + cal.get(Calendar.SECOND));
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int k=1;
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ArrayList minutesArray = new ArrayList();
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k=1440;
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while(k>=0) {
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minutesArray.add(getDateTimePlusMinute(-k));
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k=k-15;
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}
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Map<String, ArrayList> mapMinutes = new HashMap<String, ArrayList>();
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mapMinutes.put("minutes", minutesArray);
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System.out.println(mapMinutes);
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//System.out.println((24*60));
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//Calendar now = Calendar.getInstance();
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//System.out.println(now.get(Calendar.MINUTE));
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System.out.println(getDateTimePlusMinute(3));
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}
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public static void doCalendarOne() {
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Calendar now = Calendar.getInstance();
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now.setTimeZone(TimeZone.getTimeZone("Asia/Shanghai"));
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int currentHour = now.get(Calendar.HOUR_OF_DAY);
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int k=1;
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ArrayList minutesArray = new ArrayList();
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k=currentHour+1;
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while(k <24) {
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minutesArray.add(k+":00");
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minutesArray.add(k+":15");
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minutesArray.add(k+":30");
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minutesArray.add(k+":45");
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k++;
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}
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// k=1;
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// while(k<=now.get(Calendar.HOUR_OF_DAY)) {
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// minutesArray.add(k+":00");
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// minutesArray.add(k+":15");
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// minutesArray.add(k+":30");
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// minutesArray.add(k+":45");
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//
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// k++;
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// }
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//Map<String, ArrayList> mapMinutes = new HashMap<String, ArrayList>();
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//mapMinutes.put("minutes", minutesArray);
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//System.out.println(mapMinutes);
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}
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public static void doCalendarTwo() {
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Calendar now = Calendar.getInstance();
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now.setTimeZone(TimeZone.getTimeZone("Asia/Shanghai"));
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int currentHour = now.get(Calendar.HOUR_OF_DAY);
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int currentMinute = now.get(Calendar.MINUTE);
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int minuteRange = getMinuteRange(currentMinute);
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System.out.println(currentHour);
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System.out.println(currentMinute);
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System.out.println(minuteRange);
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}
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public static int getMinuteRange(int Minute) {
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int minuteRange = 0;
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if(Minute>=0 && Minute <15) {
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minuteRange = 00;
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} if(Minute>=15 && Minute <30) {
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minuteRange = 15;
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} if(Minute>=30 && Minute <45) {
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minuteRange = 30;
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} if(Minute>=45 && Minute <60) {
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minuteRange = 45;
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}
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return minuteRange;
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}
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public static void dateExample() {
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// Date now = new Date( );
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//
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// SimpleDateFormat formatHour = new SimpleDateFormat ("HH");
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// SimpleDateFormat formatMinute = new SimpleDateFormat ("mm");
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//
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// int currentHour = Integer.parseInt(formatHour.format(now)); ;
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// int currentMinute = Integer.parseInt(formatMinute.format(now));
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// int minuteRange = getMinuteRange(currentMinute);
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// System.out.println(currentHour);
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// System.out.println(currentMinute);
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// System.out.println(minuteRange);
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Calendar cal = Calendar.getInstance(); // GregorianCalendar
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// System.out.println("Calendar's toString() is : " + cal + "\n");
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// System.out.println("Time zone is: " + cal.getTimeZone() + "\n");
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// An Easier way to print the timestamp by getting a Date instance
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Date date = cal.getTime();
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System.out.println("Current date and time in Date's toString() is : " + date + "\n");
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System.out.println(java.util.TimeZone.getDefault().getID());
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}
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public static Map<String, ArrayList> getMinutesOneDayOne() {
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Calendar now = Calendar.getInstance();
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now.setTimeZone(TimeZone.getTimeZone("Asia/Shanghai"));
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int k=1;
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int currentHour = now.get(Calendar.HOUR_OF_DAY);
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int currentMinute = now.get(Calendar.MINUTE);
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ArrayList minutesArray = new ArrayList();
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k=currentHour+1;
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while(k <24) {
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minutesArray.add(k+":00");
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minutesArray.add(k+":15");
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minutesArray.add(k+":30");
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minutesArray.add(k+":45");
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k++;
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}
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k=0;
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while(k<= currentHour) {
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minutesArray.add(k+":00");
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minutesArray.add(k+":15");
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minutesArray.add(k+":30");
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minutesArray.add(k+":45");
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k++;
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}
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Map<String, ArrayList> mapMinutes = new HashMap<String, ArrayList>();
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mapMinutes.put("minutes", minutesArray);
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return mapMinutes;
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}
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}

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