how to change the date format in java to yyyy-mm-dd code example

Example 1: java calendar class format

SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy/MM/dd HH:mm:ss");
Date date = new Date();
System.out.println(dateFormat.format(date)); //2013/10/15 16:16:39

Example 2: Convert a date to yyyy mm dd format

const formatYmd = date => date.toISOString().slice(0, 10);
formatYmd(new Date());