Write a class DateSwitcher with a single main method. Inside main, write code th

Question

Write a class DateSwitcher with a single main method. Inside main, write code that, given a local String variable containing a date of the form "2/7/2009", parses each field and prints out the date in the alternative format "2009/2/7". Use System.out.printf() or String.format() to print the date with leading zeroes in the month and day fields: "2009/02/07"
If the String does not contain a /, do not try to parse the String but do print out an error message. Check out the String documentation if necessary.

Explanation / Answer

class DateSwitcher()
{
publicstatic void main(String[]args)
{
String date ="2/7/2009";

int month =Integer.parseInt(date.substring(0,date.indexOf("/")));

date = date.substring(date.indexOf("/")+1);

int day =Integer.parseInt(date.substring(0,date.indexOf("/")));

date = date.substring(date.indexOf("/")+1);

int year =Integer.parseInt(date);

System.out.println(String.format("%04d",year)+"/"+String.format("%02d",day)+"/"+String.format("%02d",month));

}
}

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