Working with Dates in Oracle ADF and Java

Get Current JBO Date with Time 

Sometimes we need to get and set the current date in our Oracle ADF code

To get the current date in an Oracle ADF application using oracle.jbo.domain.Date, we can use this code, this code can be written in model implementation classes or in Managed Bean

 /**Method to get current JBO Date with time part
     * @return
     */
    public Date getCurrentJboDate(){
        Date currentDate = (Date) Date.getCurrentDate();
        return currentDate;
    }

Get the current JBO Date in a Specific format

There are times when you need to work with just the date and not the time, whether it's for formatting purposes or for cleaner data extraction. In such cases, you can use a simple code snippet to retrieve the date in a specific format. Here's how you can do it!

    /**Method to get current JBO Date in Specific format
     * @return
     */
    public Date getformattedJboDate() {
        DateFormat dateFormat = new SimpleDateFormat("yyyy-MMM-dd");
        java.util.Date date = new java.util.Date();
        String date1 = dateFormat.format(date);
        try {
            date = dateFormat.parse(date1);
        } catch (ParseException e) {
            e.printStackTrace();
        }
        
        java.sql.Date sqlDate = new java.sql.Date(date.getTime());
        oracle.jbo.domain.Date formattedDate = new oracle.jbo.domain.Date(sqlDate);
        return formattedDate;
    }

Top 20 Most Popular Technologies (Programming/Scripting Languages) in 2018

 2018 came to an end and like every year StackOverflow performed a developer community survey asking developers about their favourite technologies, learning process, location, job type, experience etc.

This survey has an opinion of more than 100,000 developers across the world and as per their survey here goes a list of top 20 most popular programming languages across the world.

Here you can see that JavaScript is the winner with 69.8% developers using it and as per StackOverflow's previous year surveys, JavaScript is the most used programming/scripting languages since last 6 years. Java is the 5th most popular programming language with 45.3% developer base.

You can also see that HTML is widely used as it is the second most popular technology. There are more backend developers (57.9%) than front-end developers (37.8%) and you'll be surprised to know that 80% of user are coding as a hobby. There are only 1.7% developers with 30+ years of experience and approx 20% of developers are student. 87% of users taught themselves a new language and framework without taking any course. Python is the fastest growing programming language, for details go through this article - The Incredible Growth of Python

Read complete Stack Overflow Developer Survey 2018

Get All URLs From a Website Using Java Code

In this post, I am going to show you a Java class using that we can get all URLs from a website URL like a web crawler.

Here goes the Java Class

1. package client;
3. import java.io.IOException;
4. import java.io.InputStream;
5. import java.io.InputStreamReader;
6. import java.io.Reader;
8. import java.net.MalformedURLException;
9. import java.net.URI;
10. import java.net.URISyntaxException;
11. import java.net.URL;
13. import java.util.Enumeration;
15. import javax.swing.text.MutableAttributeSet;
16. import javax.swing.text.html.HTML;
17. import javax.swing.text.html.HTMLEditorKit;
18. import javax.swing.text.html.parser.ParserDelegator;
20. public class GetAllUrls {
21. public GetAllUrls() {
22. super();
23. }
25. public static void main(String[] args) {
26. final String name = "http://www.awasthiashish.com";
27. Reader r = null;
29. try {
30. URL u = new URL(name);
31. InputStream in = u.openStream();
32. r = new InputStreamReader(in);
34. ParserDelegator hp = new ParserDelegator();
35. hp.parse(r, new HTMLEditorKit.ParserCallback() {
37. public void handleStartTag(HTML.Tag t, MutableAttributeSet a, int pos) {
39. if (t == HTML.Tag.A) {
40. Enumeration attrNames = a.getAttributeNames();
42. while (attrNames.hasMoreElements()) {
43. String exactUrl = "";
44. Object key = attrNames.nextElement();
45. if ("href".equals(key.toString())) {
46. exactUrl = a.getAttribute(key).toString();
48. if (!a.getAttribute(key).toString().startsWith("http://") &&
49. !a.getAttribute(key).toString().startsWith("https://")) {
51. if (a.getAttribute(key).toString().startsWith("/")) {
52. exactUrl = name + a.getAttribute(key);
53. } else {
54. exactUrl = name.concat("/").concat(a.getAttribute(key).toString());
55. }
57. URI uri;
59. try {
60. uri = new java.net.URI(exactUrl);
61. System.out.println(uri);
62. } catch (URISyntaxException e) {
63. }
66. } else {
67. URI uri;
68. try {
69. uri = new java.net.URI(exactUrl);
70. System.out.println(uri);
71. } catch (URISyntaxException e) {
72. }
73. }
74. }
75. }
76. }
77. }
78. }, true);
79. } catch (MalformedURLException e) {
80. } catch (IOException e) {
81. } finally {
83. if (r != null) {
84. try {
85. r.close();
86. } catch (IOException e) {
87. }
88. }
89. }
90. }
91. }

and output on the console

Here you can see all the URLs linked to the home page of this website

Cheer 🙂 Happy Learning