how to change format of date from string date

Question

I have date as a string like this

String date = \"11-12-2018\"

I want to change it to \"2018-12-11\"

with the same var

Answer 1

Try code below that will work for your case:

First parse your input format from string,

String date = "11-12-2018";
SimpleDateFormat df = new SimpleDateFormat("dd-MM-yyyy");

Then convert it to desired format,

Date dateTobeParse = null;
try {
    dateTobeParse = df.parse(date);
} catch (ParseException e) {
    e.printStackTrace();
}
if (dateTobeParse != null) {
    SimpleDateFormat outFormat = new SimpleDateFormat("yyyy-MM-dd");
    String outputDate = outFormat.format(dateTobeParse);
}