Tools & Wizards About Us
learnjavaonline.org screenshot

Report Summary

  • 51

    Performance

    Renders faster than
    69% of other websites

  • 79

    Accessibility

    Visual factors better than
    that of 47% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    55% of websites

  • 81

    SEO

    Google-friendlier than
    43% of websites

learnjavaonline.org

Learn Java - Free Interactive Java Tutorial

Page Load Speed

1.4 sec in total

First Response

61 ms

Resources Loaded

675 ms

Page Rendered

658 ms

learnjavaonline.org screenshot

About Website

Visit learnjavaonline.org now to see the best up-to-date Learn Java Online content for United States and also check out these interesting facts you probably never knew about learnjavaonline.org

learnjavaonline.org is a free interactive Java tutorial for people who want to learn Java, fast.

Visit learnjavaonline.org

Key Findings

We analyzed Learnjavaonline.org page load time and found that the first response time was 61 ms and then it took 1.3 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 30% of websites can load faster.

Performance Metrics

learnjavaonline.org performance score

51

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value1.4 s

97/100

10%

LCP (Largest Contentful Paint)

Value2.3 s

92/100

25%

SI (Speed Index)

Value5.4 s

57/100

10%

TBT (Total Blocking Time)

Value1,130 ms

22/100

30%

CLS (Cumulative Layout Shift)

Value0.406

24/100

15%

TTI (Time to Interactive)

Value10.5 s

23/100

10%

Network Requests Diagram

learnjavaonline.org

61 ms

learnjavaonline.org

82 ms

bootstrap.min.css

74 ms

codemirror.css

65 ms

xq-light-media.css

81 ms

Our browser made a total of 44 requests to load all elements on the main page. We found that 68% of them (30 requests) were addressed to the original Learnjavaonline.org, 9% (4 requests) were made to Cdnjs.cloudflare.com and 5% (2 requests) were made to Pagead2.googlesyndication.com. The less responsive or slowest element that took the longest time to load (248 ms) relates to the external source Pagead2.googlesyndication.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 782.6 kB (24%)

Content Size

3.3 MB

After Optimization

2.5 MB

  • HTML
  • Images
  • JavaScript

In fact, the total size of Learnjavaonline.org main page is 3.3 MB. This result falls beyond the top 1M of websites and identifies a large and not optimized web page that may take ages to load. 80% of websites need less resources to load and that’s why Accessify’s recommendations for optimization and resource minification can be helpful for this project. Images take 2.6 MB which makes up the majority of the site volume.

HTML Optimization

-80%

Potential reduce by 27.8 kB

  • Original 34.8 kB
  • After minification 28.2 kB
  • After compression 7.0 kB

HTML content can be minified and compressed by a website’s server. The most efficient way is to compress content using GZIP which reduces data amount travelling through the network between server and browser. This page needs HTML code to be minified as it can gain 6.6 kB, which is 19% of the original size. It is highly recommended that content of this web page should be compressed using GZIP, as it can save up to 27.8 kB or 80% of the original size.

Image Optimization

-15%

Potential reduce by 390.0 kB

  • Original 2.6 MB
  • After minification 2.2 MB

Image size optimization can help to speed up a website loading time. The chart above shows the difference between the size before and after optimization. Obviously, Learn Java Online needs image optimization as it can save up to 390.0 kB or 15% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-58%

Potential reduce by 364.8 kB

  • Original 630.3 kB
  • After minification 630.3 kB
  • After compression 265.5 kB

It’s better to minify JavaScript in order to improve website performance. The diagram shows the current total size of all JavaScript files against the prospective JavaScript size after its minification and compression. It is highly recommended that all JavaScript files should be compressed and minified as it can save up to 364.8 kB or 58% of the original size.

Requests Breakdown

Number of requests can be reduced by 24 (60%)

Requests Now

40

After Optimization

16

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 40 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Learn Java Online. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 18 to 1 for JavaScripts and from 8 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

learnjavaonline.org

learnjavaonline.org

61 ms

learnjavaonline.org

learnjavaonline.org

82 ms

bootstrap.min.css

bootstrap.min.css

74 ms

codemirror.css

codemirror.css

65 ms

xq-light-media.css

xq-light-media.css

81 ms

xq-dark-media.css

xq-dark-media.css

81 ms

prism-light.css

prism-light.css

81 ms

prism-dark.css

prism-dark.css

80 ms

learnpython.css

learnpython.css

105 ms

adsbygoogle.js

adsbygoogle.js

137 ms

jquery-1.12.4.min.js

jquery-1.12.4.min.js

34 ms

popper.min.js

popper.min.js

44 ms

prism.js

prism.js

136 ms

buttons.js

buttons.js

33 ms

all.min.css

all.min.css

52 ms

codemirror.js

codemirror.js

236 ms

matchbrackets.js

matchbrackets.js

135 ms

clike.js

clike.js

171 ms

xml.js

xml.js

135 ms

css.js

css.js

234 ms

htmlembedded.js

htmlembedded.js

245 ms

htmlmixed.js

htmlmixed.js

245 ms

bootstrap.min.js

bootstrap.min.js

245 ms

bootbox.min.js

bootbox.min.js

245 ms

learnpython.js

learnpython.js

245 ms

learnjavaonline.org.ico

learnjavaonline.org.ico

118 ms

icon20x24px-exported-transparent.png

icon20x24px-exported-transparent.png

154 ms

promo_long.png

promo_long.png

119 ms

promo_mid.png

promo_mid.png

152 ms

promo_high.png

promo_high.png

160 ms

digital-ocean.svg

digital-ocean.svg

116 ms

spoj.png

spoj.png

154 ms

masterschool.png

masterschool.png

154 ms

cfk.png

cfk.png

154 ms

cfk-promo.png

cfk-promo.png

189 ms

show_ads_impl.js

show_ads_impl.js

248 ms

fa-solid-900.woff

fa-solid-900.woff

34 ms

fa-regular-400.woff

fa-regular-400.woff

34 ms

analytics.js

analytics.js

31 ms

buttons.html

buttons.html

40 ms

collect

collect

12 ms

collect

collect

31 ms

js

js

57 ms

ga-audiences

ga-audiences

76 ms

Accessibility Review

learnjavaonline.org accessibility score

79

Accessibility Issues

Names and labels

These are opportunities to improve the semantics of the controls in your application. This may enhance the experience for users of assistive technology, like a screen reader.

Impact

Issue

High

Buttons do not have an accessible name

High

Image elements do not have [alt] attributes

High

Links do not have a discernible name

Contrast

These are opportunities to improve the legibility of your content.

Impact

Issue

High

Background and foreground colors do not have a sufficient contrast ratio.

Navigation

These are opportunities to improve keyboard navigation in your application.

Impact

Issue

High

Heading elements are not in a sequentially-descending order

Best Practices

learnjavaonline.org best practices score

83

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

High

Includes front-end JavaScript libraries with known security vulnerabilities

Low

Ensure CSP is effective against XSS attacks

General

Impact

Issue

Low

Detected JavaScript libraries

High

Page has valid source maps

SEO Factors

learnjavaonline.org SEO score

81

Search Engine Optimization Advices

Content Best Practices

Format your HTML in a way that enables crawlers to better understand your app’s content.

Impact

Issue

High

Links do not have descriptive text

High

Image elements do not have [alt] attributes

Mobile Friendly

Make sure your pages are mobile friendly so users don’t have to pinch or zoom in order to read the content pages. [Learn more](https://developers.google.com/search/mobile-sites/).

Impact

Issue

High

Document uses legible font sizes

High

Tap targets are not sized appropriately

Language and Encoding

  • Language Detected

    EN

  • Language Claimed

    EN

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Learnjavaonline.org can be misinterpreted by Google and other search engines. Our service has detected that English is used on the page, and it matches the claimed language. Our system also found out that Learnjavaonline.org main page’s claimed encoding is utf-8. Use of this encoding format is the best practice as the main page visitors from all over the world won’t have any issues with symbol transcription.

Social Sharing Optimization

learnjavaonline.org

Open Graph description is not detected on the main page of Learn Java Online. Lack of Open Graph description can be counter-productive for their social media presence, as such a description allows converting a website homepage (or other pages) into good-looking, rich and well-structured posts, when it is being shared on Facebook and other social media. For example, adding the following code snippet into HTML <head> tag will help to represent this web page correctly in social networks: