{"id":1123,"date":"2010-08-13T13:01:46","date_gmt":"2010-08-13T07:01:46","guid":{"rendered":"http:\/\/aasims.wordpress.com\/?p=1123"},"modified":"2025-05-05T08:48:14","modified_gmt":"2025-05-05T08:48:14","slug":"date-formatting-in-java","status":"publish","type":"post","link":"https:\/\/aasimnaseem.com\/blog\/date-formatting-in-java\/","title":{"rendered":"Date Formatting in Java"},"content":{"rendered":"

Hi all…<\/p>\n

Hope you’re enjoying your time…\"\"<\/p>\n

Today I will explain how to use date-time (date manipulation) in the Java programming language. I was working on a task where I needed to play with time\/date. In my other post, I explained the\u00a0date formatting\u00a0in C#<\/a>. Today you will learn the same concept in Java.<\/p>\n

The Java Calendar class (java.util.Calendar) is a very useful and handy class in Java date-time manipulation. Here I will demonstrate how to modify date and time with the Calendar<\/code> class. First get the current date and time with Calendar().<\/p>\n

[code language=”java”]
\nDateFormat dateFormat = new SimpleDateFormat("yyyy\/MM\/dd HH:mm:ss");
\nCalendar cal = Calendar.getInstance();
\nSystem.out.println("Current Date Time : " + dateFormat.format(cal.getTime()));
\n[\/code]<\/p>\n

now you can use following calender date time manipulation function as per your need<\/p>\n

[code language=”java”]<\/p>\n

\/\/Add one day to current date time
\ncal.add(Calendar.DATE, 1);<\/p>\n

\/\/Add one month to current date time
\ncal.add(Calendar.MONTH, 1);<\/p>\n

\/\/Add one year to current date time
\ncal.add(Calendar.YEAR, 1);<\/p>\n

\/\/Add one hour to current date time
\ncal.add(Calendar.HOUR, 1);<\/p>\n

\/\/Add one minute to current date time
\ncal.add(Calendar.MINUTE, 1);<\/p>\n

\/\/Add one second to current date time
\ncal.add(Calendar.SECOND, 1);<\/p>\n

\/\/Subtract one day from current date
\ncal.add(Calendar.DATE, -1);<\/p>\n

\/\/Subtract one month from current date
\ncal.add(Calendar.MONTH, -1);<\/p>\n

\/\/Subtract one year from current date
\ncal.add(Calendar.YEAR, -1);<\/p>\n

\/\/Subtract one hour from current date
\ncal.add(Calendar.HOUR, -1);<\/p>\n

\/\/Subtract one minute from current date
\ncal.add(Calendar.MINUTE, -1);<\/p>\n

\/\/Subtract one second from current date
\ncal.add(Calendar.SECOND, -1);<\/p>\n

[\/code]<\/p>\n

Here is the full source code to show\u00a0how to modify date time in Java<\/p>\n

[code language=”java”]<\/p>\n

import java.text.DateFormat;
\nimport java.text.SimpleDateFormat;
\nimport java.util.Calendar;<\/p>\n

public class DateTimeManipulation {
\npublic static void main(String[] args) {<\/p>\n

DateFormat dateFormat = new SimpleDateFormat("yyyy\/MM\/dd HH:mm:ss");
\n\/\/get current date time with Calendar()
\nCalendar cal = Calendar.getInstance();
\nSystem.out.println("Current Date Time : " + dateFormat.format(cal.getTime()));<\/p>\n

cal.add(Calendar.DATE, 1);
\nSystem.out.println("Add one day to current date : " + dateFormat.format(cal.getTime()));<\/p>\n

cal = Calendar.getInstance();
\ncal.add(Calendar.MONTH, 1);
\nSystem.out.println("Add one month to current date : " + dateFormat.format(cal.getTime()));<\/p>\n

cal = Calendar.getInstance();
\ncal.add(Calendar.YEAR, 1);
\nSystem.out.println("Add one year to current date : " + dateFormat.format(cal.getTime()));<\/p>\n

cal = Calendar.getInstance();
\ncal.add(Calendar.HOUR, 1);
\nSystem.out.println("Add one hour to current date : " + dateFormat.format(cal.getTime()));<\/p>\n

cal = Calendar.getInstance();
\ncal.add(Calendar.MINUTE, 1);
\nSystem.out.println("Add one minute to current date : " + dateFormat.format(cal.getTime()));<\/p>\n

cal = Calendar.getInstance();
\ncal.add(Calendar.SECOND, 1);
\nSystem.out.println("Add one second to current date : " + dateFormat.format(cal.getTime()));<\/p>\n

cal = Calendar.getInstance();
\ncal.add(Calendar.DATE, -1);
\nSystem.out.println("Subtract one day from current date : " + dateFormat.format(cal.getTime()));<\/p>\n

cal = Calendar.getInstance();
\ncal.add(Calendar.MONTH, -1);
\nSystem.out.println("Subtract one month from current date : " + dateFormat.format(cal.getTime()));<\/p>\n

cal = Calendar.getInstance();
\ncal.add(Calendar.YEAR, -1);
\nSystem.out.println("Subtract one year from current date : " + dateFormat.format(cal.getTime()));<\/p>\n

cal = Calendar.getInstance();
\ncal.add(Calendar.HOUR, -1);
\nSystem.out.println("Subtract one hour from current date : " + dateFormat.format(cal.getTime()));<\/p>\n

cal = Calendar.getInstance();
\ncal.add(Calendar.MINUTE, -1);
\nSystem.out.println("Subtract one minute from current date : " + dateFormat.format(cal.getTime()));<\/p>\n

cal = Calendar.getInstance();
\ncal.add(Calendar.SECOND, -1);
\nSystem.out.println("Subtract one second from current date : " + dateFormat.format(cal.getTime()));<\/p>\n

}
\n}
\n[\/code]<\/p>\n

Output<\/h3>\n

Current Date Time : 2010\/08\/13 10:24:53<\/em>
\nAdd one day to current date : 2010\/08\/14 10:24:53<\/em>
\nAdd one month to current date : 2010\/09\/13 10:24:53<\/em>
\nAdd one year to current date : 2011\/08\/13 10:24:53<\/em>
\nAdd one hour to current date : 2010\/08\/13 11:24:53<\/em>
\nAdd one minute to current date : 2010\/08\/13 10:25:53<\/em>
\nAdd one second to current date : 2010\/08\/13 10:24:54<\/em>
\nSubtract one day from current date : 2010\/08\/12 10:24:53<\/em>
\nSubtract one month from current date : 2010\/07\/13 10:24:53<\/em>
\nSubtract one year from current date : 2009\/08\/13 10:24:53<\/em>
\nSubtract one hour from current date : 2010\/08\/13 09:24:53<\/em>
\nSubtract one minute from current date : 2010\/08\/13 10:23:53<\/em>
\nSubtract one second from current date : 2010\/08\/13 10:24:52<\/em><\/p>\n

Thanks for your time.<\/p>\n

\"free<\/p>\n","protected":false},"excerpt":{"rendered":"

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