- How To Get Mac App To Recognize Java Edition
- How To Get Mac App To Recognize Java File
- How To Get Mac App To Recognize Javascript
Java support for JWT (JSON Web Tokens) used to require a lot of work: extensive customization, hours lost resolving dependencies, and pages of code just to assemble a simple JWT. Not anymore!
To deploy your web app, see the Deploy a Java Application to Azure tutorial. To containerize a web app and deploy as a Docker container, check out the Working with Docker. To learn more about Java Debugging features, see Java Debugging Tutorial.
This tutorial will show you how to use an existing JWT library to do two things:
- Running a Java Web Start Application From the Java Cache Viewer. If you are using at least Java Platform, Standard Edition 6 or later, you can run a Java Web Start application through the Java Cache Viewer. When Java Web Start software first loads an application, information from the application's JNLP file is stored in the local Java Cache Viewer.
- You can write some C code and use JNI (Java Native Interface) to get MAC address. Here is the example main activity code: package com.example.getmymac; import android.os.Bundle; import android.util.Log; import android.widget.TextView; import androidx.appcompat.app.AppCompatActivity; public class GetMyMacActivity extends AppCompatActivity.
- Generate a JWT
- Decode and verify a JWT
![How to get mac app to recognize java windows 10 How to get mac app to recognize java windows 10](/uploads/1/3/4/2/134206172/109476326.png)
You’ll notice the tutorial is pretty short. That’s because it’s that easy. If you’d like to dig deeper, take a look at the JWT Spec or dive into this longer post about using JWTs for token authentication in Spring Boot apps.
What are JWTs?
JSON Web Tokens are JSON objects used to send information between parties in a compact and secure manner. The JSON spec, or Javascript Object Notation, defines a way of creating plain text objects using key value pairs. Best mac os x apps 2015. It’s a compact way of structuring data built upon primitive types (numbers, strings, etc…). You’re probably already pretty familiar with JSON. It’s like XML without all the brackets.
Tokens can be used to send arbitrary state between parties. Often here “parties” means a client web application and a server. JWTs have many uses: authentication mechanism, url-safe encoding, securely sharing private data, interoperability, data expiration, etc.
In practice, this information is often about two things: authorization and session state. JWTs can be used by a server to tell the client app what actions the user is allowed to execute (or what data they are allowed to access).
JWTs are often also used to store state-dependent user data for a web session. Because the JWT is passed back and forth between the client app and the server, it means that state data does not have to be stored in a database somewhere (and subsequently retrieved on every request); because of this, it scales well.
Let’s take a look at an example JWT (taken from jsonwebtoken.io)
JWTs have three parts: a header, a body, and a signature. The header contains info on how the JWT is encoded. The body is the meat of the token (where the claims live). The signature provides the security.
There’s a lot of detail we’re not going to go into here regarding how tokens are encoded and how information is stored in the body. Check out the previously mentioned tutorial if you want.
Don’t forget: cryptographic signatures do not provide confidentiality; they are simply a way of detecting tampering with a JWT, and unless a JWT is specifically encrypted, they are publicly visible. The signature simply provides a secure way of verifying the contents.
Great. Got it? Now you need to make a token with JJWT!For this tutorial, we’re using an existing JWT library. Java JWT (a.k.a., JJWT) was created by Les Hazlewood (lead committer to Apache Shiro, former co-founder and CTO at Stormpath, and currently Okta’s very own Senior Architect), JJWT is a Java library that simplifies JWT creation and verification. It is based exclusively on the JWT, JWS, JWE, JWK and JWA RFC specifications and open source under the terms of the Apache 2.0 License. The library also adds some nice features to the spec, such as JWT compression and claims enforcement.
Generate a Token in Java
This parts super easy. Let’s look at some code. Clone the GitHub repo:
This example is pretty basic, and contains a
src/main/java/JWTDemo.java
class file with two static methods: createJWT()
and decodeJWT()
. Cunningly enough, these two methods create a JWT and decode a JWT. Take a look at the first method below.To summarize, the
createJWT()
method does the following:- Sets the hashing algorithm
- Gets the current date for the Issued At claim
- Uses the SECRET_KEY static property to generate the signing key
- Uses the fluent API to add the claims and sign the JWT
- Sets the expiration date
This could be customized to your needs. If, for example, you wanted to add different or custom claims.
Decode a Token
Now take a look at the even simpler
decodeJWT()
method.The method again uses the static
SECRET_KEY
property to generate the signing key, and uses that to verify that the JWT has not been tampered with. The method will throw io.jsonwebtoken.SignatureException
exception if the signature does not match the token. If the signature does match, the method returns the claims as a Claims
object.That’s pretty much it!
Run the JUnit Tests
For extra credit, you can run the JUnit tests in the example project. There are three tests, and they demonstrate some basic features on the JJWT library. The first test shows the happy path, creating and successfully decoding a valid JWT. The second test shows how the JJWT library will fail when you attempt to decode a totally bogus string as a JWT. The last test shows how a tampered-with JJWT will cause the
decodeJWT()
method to throw a SignatureException
.You can run these tests from the command line using:
The
-i
is to set Gradle’s log level to Info
so that we see the simple logging output from the tests.Learn More About Working with JWTs in Your Java Apps
The JJWT library makes it super easy to create and verify JWTs. Just specify a secret key and some claims, and you’ve got a JJWT. Later, use the same secret key to decode the JJWT and verify its contents.
Creating and using JJWTs is now so easy, why aren’t you using them?
Don’t forget SSL! Remember that unless JWTs are encrypted, the information encoded within them is generally only Base64 encoded, which any small child and some pets can read. So unless you want China, Russia, and the FBI reading all of your session data, encrypt it using SSL.
Baeldung has a pretty good in depth tutorial on Java and JWTs.
Also, here are some more links from the Okta blog to keep you going:
If you have any questions about this post, please add a comment below. For more awesome content, follow @oktadev on Twitter, like us on Facebook, or subscribe to our YouTube channel.
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Mac lock screen app.
Like many online games, Puzzle Pirates requires a download before you can play. But don't be afraid! The installation of Puzzle Pirates is a relatively straight forward process that shouldn't cause any worries for an intrepid Pirate.
Like many online games, Puzzle Pirates requires a download before you can play. But don't be afraid! The installation of Puzzle Pirates is a relatively straight forward process that shouldn't cause any worries for an intrepid Pirate.
You can email us using the Puzzle Pirates Support form if you've tried to download and had a problem. We'll be happy to help in any way we can!
This section is provided to help explain what's involved in downloading the game. If you're ready to start playing now, you can skip the information below and go straight to getting the game:
Otherwise, it makes sense to start with some information on what you'll be installing:
Puzzle Pirates is a java-based game. You'll actually be installing a Java client when you download the game. When you play, the Java client connects to our Puzzle Pirates servers. The server manages all the information about your Pirate and allows you to use the game puzzles, talk to other players, and so on.
The client software comes in four parts and totals around 46 megabytes.
- 400kb Installer
- 12mb of Java 1.5 (optional, may not be required)
- 4mb of Client Code
- 30mb of Artwork and Sound
Generally, download time is 7 minutes on DSL (768k) and around 1 hour 45 minutes on a modem (56k).
Depending on your operating system, the download is going to require you to click to accept the game a couple of times. These steps are in place to make sure you're aware that the installation is occurring. Generally, you'll get the same kinds of message whatever you try to install, so there shouldn't be any reason to worry during this process.
Below, we've provided some useful points that will hopefully get you through any problems with the installation process.
What is this Security Certificate for?
How To Get Mac App To Recognize Java Edition
When you choose to create a pirate and launch the game from our website, you may see a Grey Havens security certificate pop up. You must agree to trust it so that our installer program can copy the game guts to your computer. If you click 'no' or 'don't trust' on this window, the installer program will give an error.
In this case, you can either close your web browser and open it again for a second chance to trust our certificate, or choose to instead Download the game to your computer and install it from there. You will still be able to create a new pirate if you choose to download.
What Platforms are Supported?
Puzzle Pirates runs in Java 1.5 and is presently supported on Windows 98, ME, 2000, XP, and Vista, on Mac OS X 10.4 'Tiger', OS X 10.5 'Leopard', on Linux and other Unix platforms.
What is the Minimum Specification machine?
We recommend that Puzzle Pirates is played on a 500mhz Pentium II with 256mb of memory or better. Puzzle Pirates does not require any particular video card. The game uses about 100mb of disc space at minimum.
It may be possible to play with a lower specification machine, but it's not advisable. You may experience delays in crowded scenes, and occasionally puzzles may fail to start properly due to client lag.
How do I play on Mac OS X Tiger/Leopard/Yosemite?
In order to play on Mac OS X, you simply need to have the latest Java release from Apple, then click here to download the installer for Mac OS X.
If you have OS X 10.4.11, you can upgrade to Java 5.0 by downloading it from Apple's website. Java 5.0 fixes many of the graphical glitches present in Java 1.4.
Unfortunately, Mac OS X 10.4 'Tiger' or higher is required and earlier versions of Mac OS X will not run Puzzle Pirates in a playable state. Regarding minimum specs, any Mac that runs 10.4 comfortably should run Puzzle Pirates, but more memory is definitely an advantage.
Looking for another version of Java?
Java 7 can be found at the Oracle website:http://www.oracle.com/technetwork/java/javase/downloads/jre7-downloads-1880261.html
Java 6 can be downloaded from the Apple support website:http://support.apple.com/kb/DL1572
You will need to run the 'Java Preferences' utility in /Applications/Utilities/Java/J2SE *.0 and set the default version of Java to *.0 in order to have Puzzle Pirates use that version of Java.
Firewall and Connection Problems
What Ports does Yohoho! use? I am behind a Firewall.
Puzzle Pirates uses TCP over ports 47624 and 4007, along with port 80 for in-game web pages.
I am having Proxy problems
How To Get Mac App To Recognize Java File
A proxy server may cause problems when you start the game, including seeing a dialog box asking you for your Proxy settings. You should be able to find these in your browser settings; look until Tools, Options, Connections, LAN Settings or the settings button for your particular connection. Unfortunately if this doesn't work it gets a bit fiddly, you may have to take a look in the Technical Issues forum. If you are sure you don't have a proxy, please make sure that you are not running any software firewalls that are blocking Puzzle Pirates from connecting to our servers - common culprits include Windows Firewall, Norton Internet Security, or ZoneAlarm. If you are running a software firewall, make sure that 'javaw.exe' is on the list of programs authorized to connect to the internet.
Windows Issues
My virus scanner gives me an alert when running Puzzle Pirates?
Virus scanners often interfere with games, although we have had no recent reports of this happening with Puzzle Pirates. Please contact Support with details. We assure you that there is no virus contained in Puzzle Pirates.
When I try to download the latest update it fails?
If you encounter such problems please make sure you disable any Virus Scanner you're running when trying to update Puzzle Pirates. Also check the Technical Issues forum for the latest on any known problems. You can use the Puzzle Pirates full installer to correct any problems with our dynamic launcher or corruption of your game files.
How To Get Mac App To Recognize Javascript
Java fails to initialize when I run Puzzle Pirates
Some folks have trouble installing the new version of Java that comes with Puzzle Pirates. Restart app store mac. To fix this, please do the following:
Go to the Control Panel, select Add/Remove Programs. Look for 'Java 2 Runtime Environment', and remove that.
You may need to reboot. Then just try running the Yohoho installer again. Please contact Support if this fails.
Mac Issues
On Mac OS X Tiger or Leopard, I get an error, 'Java Application has Unexpectedly Quit'
The most likely cause of the problem is that Java is in a broken state from when you updated your system to Tiger or Leopard. You can check by opening Terminal.app (In the Applications/Utilities folder) and typing:
java -version
https://ngyxuld.weebly.com/blog/how-to-force-to-close-n-app-on-mac. If it responds:
HotSpot not at correct virtual address. Sharing disabled.java version '1.4.1_01'Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.1_01-69.1)Java HotSpot(TM) Client VM (build 1.4.1_01-24, mixed mode)
then Java is broken on your machine. But fear not! Apple realized it was their installer that caused this and has a fix available at:
which you can download and run, which should get you going again!
Performance Problems
![App App](/uploads/1/3/4/2/134206172/366378921.png)
You could try switching off Sound, this may help considerably. Make sure that you are not running any other programs. Puzzle Pirates does like to use memory, if you notice your harddrive chunking a lot then this is probably the issue.
Digest.txt Problems
If the application fails to launch because it's missing digest.txt, then you'll need to delete the following three files and relaunch the application: getdown.txt, version.txt, and digest.txt. The following are some example installation paths where these files can be found:
- Windows XP
- C:Program FilesThree Rings DesignPuzzle Pirates
- Steam: C:Program FilesSteamsteamappscommonpuzzle pirates
- Mac
- /Users/<username>/Library/Application Support/yoclient
- Linux
- /home/<username>/yoclient
Searching your computer for yoclient will find any relevant installation folder(s), including the location of files for browser launches.
Puzzle Pirates makes my MP3s/Movies/etc. Booch
Puzzle Pirates has been known to be a bit of a processor hog, so it may interfere with your MP3 player or other software. Assuming that you have a fast machine and should be attempting to run Puzzle Pirates along with the latest pirate shanties, this is a Java problem that we hope Sun are doing their best to resolve.
Uninstall
How do I uninstall Puzzle Pirates?
On Windows go to the Start menu, Control Panel, Add/Remove Programs, and Uninstall Puzzle Pirates. You may also wish to uninstall Java 1.4 via the Control Panel, Add/Remove Programs.
If you're using Unix you should be able simply `rm -rf yohoho` from the installation directory and bid the game farewell.
On Mac OS X, simply dragging the Puzzle Pirates application to the trash will completely erase Puzzle Pirates from your computer.