vb.net print barcode Creating a java.sql.Time Object Using the java.lang.System Class in Font

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Creating a java.sql.Time Object Using the java.lang.System Class
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The following shows how to create a java.sql.Time object using the java.lang.System class: java.sql.Time tm = new java.sql.Time(System.currentTimeMillis());
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CHAPTER 9 WORKING WITH DATE, TIME, AND TIMESTAMP IN JDBC
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9-16. How Do You Convert the Current Time to a java.sql.Date Object
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The following shows how to convert the current time to a java.sql.Date object: import java.util.Calendar; import java.sql.Date; ... Calendar currenttime = Calendar.getInstance(); Date sqldate = new Date((currenttime.getTime()).getTime()); or as a method: import java.util.Calendar; import java.sql.Date; ... public static Date getCurrentJavaSqlDate () { Calendar currenttime = Calendar.getInstance(); return new Date((currenttime.getTime()).getTime()); }
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9-17. How Do You Determine the Day of the Week from Today s Date
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The answer to this question is to use java.util.Calendar.SUNDAY, java.util.Calendar.MONDAY, and so on: public static int getDayOfWeek() { java.util.Date today = new java.util.Date(); java.sql.Date date = new java.sql.Date(today.getTime()); java.util.GregorianCalendar cal = new java.util.GregorianCalendar(); cal.setTime(date); return cal.get(java.util.Calendar.DAY_OF_WEEK); }
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9-18. How Do You Determine the Day of the Week from a Given java.util.Date Object
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The answer to this question is to use java.util.Calendar.SUNDAY, java.util.Calendar.MONDAY, and so on: public static int getDayOfWeek(java.util.Date utilDate) throws Exception { if (utilDate == null) { throw new Exception("date can not be null."); } java.sql.Date d = new java.sql.Date(utilDate.getTime()); java.util.GregorianCalendar cal = new java.util.GregorianCalendar(); cal.setTime(d); return cal.get(java.util.Calendar.DAY_OF_WEEK); }
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9-19. How Do You Convert java.sql.Date to java.util.Date
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The following shows how to convert java.sql.Date to java.util.Date:
CHAPTER 9 WORKING WITH DATE, TIME, AND TIMESTAMP IN JDBC
public java.util.Date convert(java.sql.Date source) { if (source == null) { return null; } return new java.util.Date(source.getTime()); }
9-20. What Is java.text.SimpleDateFormat
According to J2SE 5.0, SimpleDateFormat extends the DateFormat class and is defined as follows: SimpleDateFormat is a concrete class for formatting and parsing dates in a locale-sensitive manner. It allows for formatting (date -> text), parsing (text -> date), and normalization. SimpleDateFormat allows you to start by choosing any user-defined patterns for date-time formatting. However, you are encouraged to create a date-time formatter with either getTimeInstance, getDateInstance, or getDateTimeInstance in DateFormat. Each of these class methods can return a date/time formatter initialized with a default format pattern. You may modify the format pattern using the applyPattern methods as desired. For more information on using these methods, see DateFormat. Table 9-4 lists some useful format strings for java.text.SimpleDateFormat. Table 9-4. Sample Format Strings for SimpleDateFormat
Standard
ISO 8160 ISO 8610 SQL Date
String Format
yyyy-MM-dd'T'H:mm:ss'Z' yyyyMMdd'T'HH:mm:ss yyyy.MM.dd
Purpose
Used in EDI/OBI data, and so on Used in XML-RPC JDBC date format
9-21. How Do You Convert java.util.Date to a Date String in the Format MM/DD/YYYY
The following shows how to convert java.util.Date to a Date string in the format MM/DD/YYYY: import java.util.Calendar; import java.util.Date; ... /** * Convert java.util.Date to a date String in the format MM/DD/YYYY * @param date the java.util.Date * @return a date String in the format MM/DD/YYYY * (if input is null, then return null). */ public static String toDateString(Date date) { if (date == null) { return null; } Calendar calendar = Calendar.getInstance(); calendar.setTime(date); int month = calendar.get(Calendar.MONTH) + 1; int day = calendar.get(Calendar.DAY_OF_MONTH); int year = calendar.get(Calendar.YEAR);
CHAPTER 9 WORKING WITH DATE, TIME, AND TIMESTAMP IN JDBC
String monthString; if (month < 10) { monthString = "0" + month; } else { monthString = "" + month; } String dayString; if (day < 10) { dayString = "0" + day; } else { dayString = "" + day; } String yearString = "" + year; return monthString + "/" + dayString + "/" + yearString; }
9-22. How Do You Create a Time String in the Format HH:MM:SS from an Hour, Minute, Second Format
The following shows how to make a Time string in the format HH:MM:SS from an Hour, Minute, Second format: /** * Makes a time String in the format HH:MM:SS from separate ints * for hour, minute, and second. If the seconds are 0, then the output * is in HH:MM. It is assumed that all of the input arguments will have * proper values. * @param hour the hours as integer * @param minute the minutes as integer * @param second the seconds integer * @return a time String in the format HH:MM:SS or HH:MM */ public static String toTimeString(int hour, int minute, int second) { String hourString; if (hour < 10) { hourString = "0" + hour; } else { hourString = "" + hour; } String minuteString; if (minute < 10) { minuteString = "0" + minute; } else { minuteString = "" + minute; } String secondString; if (second < 10) { secondString = "0" + second;
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