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Java Articles
Page 90 of 450
Java Program to split a string with dot
Let’s say the following is our string.String str = "Java is a programming language. James Gosling developed it.";We will now see how to split a string using the split() method. Include the delimiter as the parameter.String[] strSplit = str.split("\.");Above, we have split the string with dot as you can see under the split methods parameter.The following is an example.Examplepublic class Demo { public static void main(String[] args) { String str = "Java is a programming language. James Gosling developed it."; System.out.println("String: "+str); String[] strSplit = str.split("\."); System.out.println("Splitting ...
Read MoreConvert the Current Time to a java.sql.Date Object
Firstly, create a Calendar class object.Calendar calendar = Calendar.getInstance();Now, import the following package.import java.sql.Date;Using a Date class now and creating an object would belong to the above package. Convert the current time to the java.sql.Date Object.Date sqlDate = new Date((calendar.getTime()).getTime());The following is an example.Exampleimport java.util.Calendar; import java.sql.Date; import java.text.ParseException; public class Demo { public static void main(String[] args) throws ParseException { Calendar calendar = Calendar.getInstance(); // object Date sqlDate = new Date((calendar.getTime()).getTime()); System.out.println(sqlDate); } }Output2018-11-19
Read MoreJava Program to convert Date into milliseconds
Import the following package to work with Date class.import java.util.Date;No create a Date object.Date d = new Date();Let us convert the current date to milliseconds.d.getTime()The following is an example.Exampleimport java.util.Date; public class Demo { public static void main(String[] args) { Date d = new Date(); System.out.println("Date = " + d); System.out.println("Milliseconds since January 1, 1970, 00:00:00 GMT = " + d.getTime()); } }OutputDate = Mon Nov 19 06:30:11 UTC 2018 Milliseconds since January 1, 1970, 00:00:00 GMT = 1542609011369
Read MoreGet the Day of the Week from Today's Date in Java
To get the day of the week, use the Calendar.DAY_OF_WEEK.Firstly, let us get the current date.java.util.Date utilDate = new java.util.Date(); java.sql.Date dt = new java.sql.Date(utilDate.getTime());Now, using GregorianCalendar, set the time.java.util.GregorianCalendar cal = new java.util.GregorianCalendar(); cal.setTime(dt);The last step would display the day of the week as shown in the following example.Exampleimport java.text.ParseException; public class Demo { public static void main(String[] args) throws ParseException { java.util.Date utilDate = new java.util.Date(); java.sql.Date dt = new java.sql.Date(utilDate.getTime()); System.out.println("Today's date: "+dt); java.util.GregorianCalendar cal = new java.util.GregorianCalendar(); cal.setTime(dt); ...
Read MoreGet Day Number of Week in Java
To get the day of the week, use Calendar.DAY_OF_WEEK.Firstly, declare a calendar object and get the current date and time.Calendar calendar = Calendar.getInstance(); System.out.println(calendar.getTime().toString());Now, fetch the day of the week in an integer variable.int day = calendar.get(Calendar.DAY_OF_WEEK);The following is the final example.Exampleimport java.util.Calendar; public class Demo { public static void main(String[] args) { Calendar calendar = Calendar.getInstance(); System.out.println(calendar.getTime().toString()); int day = calendar.get(Calendar.DAY_OF_WEEK); System.out.println("Day: " + day); int hour = calendar.get(Calendar.HOUR_OF_DAY); System.out.println("Hour: " + hour); int minute = calendar.get(Calendar.MINUTE); ...
Read MoreDisplay Day Name of Week using Java Calendar
For using Calendar class, import the following package.import java.util.Calendar;Using the Calendar class, create an object.Calendar calendar = Calendar.getInstance();Now, create a string array of the day names.String[] days = new String[] { "Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday" };Display the day name.days[calendar.get(Calendar.DAY_OF_WEEK) - 1]The following is the final example.Exampleimport java.util.Calendar; public class Demo { public static void main(String[] args) { Calendar calendar = Calendar.getInstance(); System.out.println("Day: " + (calendar.get(Calendar.DATE))); System.out.println("Month: " + (calendar.get(Calendar.MONTH) + 1)); System.out.println("Year: " + (calendar.get(Calendar.YEAR))); String[] days = new String[] { ...
Read MoreDisplay Month of Year using Java Calendar
For using Calendar class, import the following package.import java.util.Calendar;Using the Calendar class, create an object.Calendar calendar = Calendar.getInstance();Now, create a string array of the month names.String[] month = new String[] {"January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December" };Display the month name.month[calendar.get(Calendar.MONTH)]The following is an example.Exampleimport java.util.Calendar; public class Demo { public static void main(String[] args) { Calendar calendar = Calendar.getInstance(); String[] month = new String[] {"January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December" }; System.out.println("Current Month = " + month[calendar.get(Calendar.MONTH)]); ...
Read MoreGet current time information in Java
Import the following package for to work with Calendar class in Java, import java.util.Calendar;Create a calendar class now.Calendar cal = Calendar.getInstance();To display entire time information, use the following fields.cal.get(Calendar.HOUR_OF_DAY) cal.get(Calendar.HOUR) cal.get(Calendar.MINUTE) cal.get(Calendar.SECOND) cal.get(Calendar.MILLISECOND)The following is the final example.Exampleimport java.util.Calendar; public class Demo { public static void main(String[] args) { Calendar cal = Calendar.getInstance(); // current date and time System.out.println(cal.getTime().toString()); // time information System.out.println("Hour (24 hour format) : " + cal.get(Calendar.HOUR_OF_DAY)); System.out.println("Hour (12 hour format) : " + cal.get(Calendar.HOUR)); ...
Read MoreGet week of month and year using Java Calendar
For using Calendar class, import the following package.import java.util.Calendar;Create a Calendar class object.Calendar cal = Calendar.getInstance();Now, get the week of month and year using the following fields.Calendar.WEEK_OF_MONTH Calendar.WEEK_OF_YEARThe following is an example.Exampleimport java.util.Calendar; public class Demo { public static void main(String[] args) { Calendar cal = Calendar.getInstance(); // current date and time System.out.println(cal.getTime().toString()); // date information System.out.println("Date Information.........."); System.out.println("Year = " + cal.get(Calendar.YEAR)); System.out.println("Month = " + (cal.get(Calendar.MONTH) + 1)); System.out.println("Date = " + cal.get(Calendar.DATE)); ...
Read MoreChecking for a Leap Year using GregorianCalendar in Java
The GregorianCalendar.isLeapYear() method determines if the given year is a leap year. Returns true if the given year is a leap year.Firstly, import the following package to work with GregorianCalendar class.import java.util.GregorianCalendar;Now, check for a year by adding it as a parameter in the isLeapYear() method.gcal.isLeapYear(2012)The following is an example.Exampleimport java.text.ParseException; import java.util.GregorianCalendar; public class Demo { public static void main(String[] args) throws ParseException { GregorianCalendar gcal = new GregorianCalendar(); System.out.println("Is it a leap year? "+gcal.isLeapYear(2012)); } }OutputIs it a leap year? trueLet us see another example.Exampleimport java.text.ParseException; import java.util.GregorianCalendar; public class ...
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