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What are all the different ways to create an object in Java? This is one of popular questions in any Java Core interview. We all know how to create objects of any class by using new keyword. However, We will find out all the different ways to create an object in Java. I will list … Read moreWhat are all the different ways to create an object in Java
How to loop a Map in Java or How many ways to loop Map in Java are most important questions in any Java interview. It’s require a developer to list down the ways of loop a Map in Java. This post will show you five different ways of traversing a Map in java. 1st way … Read moreHow to loop a Map in Java
Convert Date to String in Java is a continuation of the previous post. Here we show you how to convert date to string in java by creating a complete example program. Let’s begin to create example program for Date to String conversion: In this example I am taking current date via Calendar instance as an … Read moreConvert Date to String in Java
Convert string to date in java is popular case that we have to process in java projects. This tutorial shows you a complete example to demo this case and package this string to date conversion to utility function. Here is complete program for converting string to date
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package com.javabycode.date; import java.text.DateFormat; import java.text.SimpleDateFormat; import java.util.Date; public class StringToDateExample { public static void main(String args[]) { String dateStr = "02/09/2016"; String dateStr2 = "02-09-2016 23:37:50"; String dateStr3 = "02-Sep-2016"; String dateStr4 = "09 02, 2016"; String dateStr5 = "Fri, Sep 02 2016"; String dateStr6 = "Fri, Sep 02 2016 23:37:50"; DateFormat df = new SimpleDateFormat("dd/MM/yyyy"); DateFormat df2 = new SimpleDateFormat("dd-MM-yyyy HH:mm:ss"); DateFormat df3 = new SimpleDateFormat("dd-MMM-yyyy"); DateFormat df4 = new SimpleDateFormat("MM dd, yyyy"); DateFormat df5 = new SimpleDateFormat("E, MMM dd yyyy"); DateFormat df6 = new SimpleDateFormat("E, MMM dd yyyy HH:mm:ss"); try { // format() method formats a Date into a date/time string. Date d1 = df.parse(dateStr); System.out.println("Date: " + d1); System.out.println(" ==> Date in dd/MM/yyyy format is: " + df.format(d1)); Date d2 = df2.parse(dateStr2); System.out.println("Date: " + d2); System.out.println(" ==> Date in dd-MM-yyyy HH:mm:ss format is: " + df2.format(d2)); Date d3 = df3.parse(dateStr3); System.out.println("Date: " + d3); System.out.println(" ==> Date in dd-MMM-yyyy format is: " + df3.format(d3)); Date d4 = df4.parse(dateStr4); System.out.println("Date: " + d4); System.out.println(" ==> Date in MM dd, yyyy format is: " + df4.format(d4)); Date d5 = df5.parse(dateStr5); System.out.println("Date: " + d5); System.out.println(" ==> Date in E, MMM dd yyyy format is: " + df5.format(d5)); Date d6 = df6.parse(dateStr6); System.out.println("Date: " + d6); System.out.println(" ==> Date in E, E, MMM dd yyyy HH:mm:ss format is: " + df6.format(d6)); } catch (Exception ex) { System.out.println(ex); } } } |
Run above main and output will be … Read moreConvert String to date in Java
This tutorial shows you how to sort hashmap by key in java using java.util.TreeMap. Beside it also shows how to sort a hashmap in Ascending or Descending order by key or value using a custom Comparator and Java 8 Lambda expression. Sorted HashMap By Key Example You sort a java.util.HashMap by putting all the entries … Read moreHow to sort Hashmap by key in Java
