• DrJava is an integrated Java development environment that supports interactive evaluation of expressions. It is available for free, and it is available under an open source license (GPL).
• Download DrJava for free. A lightweight programming environment for Java. DrJava is a lightweight programming environment for Java designed to foster test-driven software development. It includes an intelligent program editor, an interactions pane for evaluating program text, a source level debugger, and a unit testing tool.

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Download DrJava (2021) for Windows PC from SoftFamous. 100% Safe and Secure. Free Download (64-bit / 32-bit). This videos shows how to install and set up drjava on Mac.

Download the Mac OS X installer lift-java.pkg. Double-click lift-java.pkg to install the software. Enter your Mac OS X password when prompted and use all of the default options. 1- Download Mac OS Mac OS is a computer operating system developed by Apple. This is a operating system with beautiful interface, however, to own a the computer of Apple with this operating system, you need to use a lot of money, normally with the double price than that of common computers using Windows operating system.

Downloading and setting up DrJava

DrJava is a free environment for writing and running Java programs. It is installed on CIT's computers throughout the campus and in the ACCEL lab.

Please note that there are two versions of Java. The older version, Java 1.4.2, and the newer version, Java 1.5. For most of the semester, it will not matter which version you are using. We will not make use of the new features in Java 1.5.

You need a Java virtual machine

You will need the Java software development kit (JDK) from the Sun website. THIS MAY ALREADY BE ON YOUR COMPUTER. Don't attempt to download and install it unless you know you don't have it. If you have a Macintosh running Mac OS X, you almost certainly have it. If you have a PC, this site can check whether you have it:

If you need the Java software development kit (JDK) get it from this website:

See the Popular Downloads link on the right side of that page. Choose J2SE 5.0. Also, choose the J2SE JDK or SDK (not just the JRE and not the 'bundles' that include other programming environments, such as netBeans). Warning: this is a big download!

Can't execute jar files

If you cannot double-click on a jar file to start it running, or if you cannot execute any of the commands java, javac, javadoc, or jar, you probably have not set your path correctly. We explain this for Windows 2000; older windows systems are similar.
Your system contains a variable that lists directories with executable files in them. Type 'path' in a command-line window. The line that is printed contains path names separated by semicolons. For example, one path name may be:

C:WINNTsystem32

There should be a path that looks like this: C:j2sdk1.4.1_02bin. This is a directory called bin inside the directory where you installed the sdk. It may be different on your computer. If such a path is not there, you have to add it. Bring up the help in your Windows system, open the index, and look for 'path'. There, you will find instructions on appending another directory to variable path. It may be something like this (but read the instructions):
path %path%;C:j2sdk1.4.1_02bin

Downloading DrJava

The easiest thing for you to do is to download this version of DrJava drjava-stable-20080106-0744. This version is supposed to work whether you have Java 1.4.2 or Java 1.5, and we advise using it.

If you want, open this web page (by clicking the link) in your browser and choose another version of DrJava to download. Get the latest version. Note that DrJava won't run unless you have a Java 2 v1.3 (or later) virtual machine already installed.

Warning: you may get a dialog saying something about a 'JAR archive security check'. If you do, just right-click on the DrJava download link and select 'Save Link As' (or the equivalent in your browser).

We know that all this setup can be annoying, but you have to do it only once!

A common DrJava problem: finding tools.jar

Question: I downloaded Sun's J2SE SDK and DrJava. When it came to actually running DrJava, the following window kept popping up even though somehow DrJava still managed to run without me finding the file --what should I do?:

Compiler not found. The file you chose did not appear to contain the compiler. Would you like to pick again? The compiler is generally located in 'tools.jar', in 'lib' subdirectory under your JDK installation director. (If you say 'No', DrJava will be unable to compile programs.)

Answer: First, make sure you installed the Java SDK, not the JRE. (See above.)

Install apk bluestacks mac. BlueStacks is a PC platform. Since you are on your phone, we are going to send you to the Google Play page. (In some cases BlueStacks uses affiliate links when linking to Google Play). Save as app name.apk and right click on that file and open with HD-apk handler.exe which is located in C:Program Files (x86)BlueStacks. I just copied my APK file into the Apps folder, which is created by default in the Libraries folder at the time of BlueStacks installation. Then I just double clicked on the APK file to install it to the App Player. To install BlueStacks on your PC or Mac simply do the following. Download the.exe/.dmg file from bluestacks.com; Once the download is complete, just follow the instructions as they appear; After the first boot is complete, sign in with your Gmail account or add it later. Uses 40% less RAM than other platforms for a faster and smoother gaming. This worked for me except in step 1 the path was /Applications/BlueStacks.app/Contents/MacOS/filename.apk and in 2 the command was /Applications/Bluestacks.app/Contents/MacOS/adb devices and in 3 the command was /Applications/BlueStacks.app/Contents/MacOS/adb install.

Next, file tool.jar comes with the JDK. The usual location is

C:Program FilesJavajdk1.5.0_02libtools.jar

if you have followed the default options during the JDK download process. You can also use a desktop tool to search for this file on your computer. You simply need to set DrJava's Preferences to the correct path. To do so, follow these menu items: Edit - Preferences - Resource Locations - Tools.jar Location then type or browse to the correct location.

Running DrJava

There are several ways to run DrJava:

• From the command line, you can type java -jar drjava-stable-20061025-1556.jar
• On many platforms, you can simply double-click the jar file to start DrJava.
• On OS X, you can download the drjava-stable-20061025-1556.jar-osx.tar.gz package. You can then run DrJava as a normal application.

Documentation --how to use DrJava

The demos given in class and in the demo sessions should help, if you take notes. However, here is documention on using DrJava (http://drjava.sourceforge.net/userdocs/) on the web.

Wrong-version error.

Do you get a message that looks like this?

Error: cannot access javax.swing.JFrame
bad class file: C:Program FilesJavajre1.5.0librt.jar(javax/swing/JFrame.class)
class file has wrong version 49.0, should be 48.0
Please remove or make sure it appears in the correct subdirectory of the classpath.

Fl studio 20 mac free. It may mean that your computer has two different systems on it and is an inconsistent state. If your computer has jre5.0, then it cannot use SDK 4.7. Uninstall SDK4.7 and download JDK 5.0 and use its tools.jar.

In Mac OS 10.7, the Library folder is hidden. Preferences, presets, and other user customization settings are stored within this Library folder.

To access the Library folder:

For instructions on additional methods to make the Library folder visible, see How to access hidden user library files Mac OS 10.7 Lion.

Some features in many Adobe applications require the Oracle Java Runtime Environment (JRE). In Mac OS 10.7, Java is no longer preinstalled but is an optional installation item.

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Current Adobe installers and applications were built before these changes to Mac OS and anticipate that Java is installed. Adobe and Apple worked together to ensure that you can install Java with Mac OS 10.7, or at a later time before you install Adobe applications. (When you start an Adobe application, you are prompted to install Java if it isn't already installed.) In a corporate IT environment, be sure to preinstall Java, or make sure that it can be installed through firewalls or other security software.

If the Java Runtime isn't installed, the following issues can occur in Adobe applications:

• Features are missing or behave improperly
• The software doesn't start
• Prompts to install Java Runtime occur
• Applications hang or quit

For instructions to install the Java Runtime, see How to install the Java Runtime (JRE) Mac OS 10.7 Lion.

In Illustrator CS5 and CS5.1, and in InDesign CS5.5, Crash Reporter doesn’t appear or appears after long delays (10-15 minutes).

When you scroll, the result could be the opposite of expected due to the 'Move content in direction of finger movement when scrolling or navigating' feature. To alter this behavior, deselect the feature at the top of the Mouse section within the System Preferences.

CS2 and earlier versions of Adobe products require Rosetta to run on newer Intel-based Mac systems. These older versions are not supported on Mac OS 10.7 as it doesn't support Rosetta.

Mac OS 10.7 has some exciting new features such as Autosave, Restore, Versioning, Full Screen Mode, and more multi-touch gestures. For Adobe applications to fully support these features, additional product development is required. Adobe is working to address this issue. For related information, see Mac OSX 10.7 preference to 'Restore windows when quitting and re-opening apps' doesn't work with Adobe applications.

Adobe Reader plug-in and Acrobat plug-in are not compatible with the Safari 5.1 browser, included with Mac OS 10.7 and for 10.6 in July 2011. Adobe Reader and Acrobat continue to work as stand-alone applications on Mac OS 10.7 and 10.6, and render PDF documents outside the browser. In addition, Safari 5.1 renders PDF documents natively. However, the Adobe Reader and Acrobat plug-ins don't function as expected in LiveCycle. And Acrobat workflows that require either plug-in to render PDF documents in Safari 5.1.

Recommendations:
If you use forms, digital signatures, portfolios, guides, 3D, extended PDF documents and rights management, and require the Acrobat plug-in to render PDF documents in the Safari browser, Adobe recommends that you continue to use Safari 5.0.x and Mac OS X 10.6. Adobe will provide updates as it continues to investigate this issue. For additional information, see Apple Safari 5.1 and Adobe Reader/Acrobat Advisory.

When Adobe Drive 2 or 2.1 connects to a digital asset management (DAM) server, Photoshop, InDesign, InCopy, Illustrator, and the Mac OS X Finder can't display folders or files in second-level folders of a mounted drive. Adobe Drive 3 addresses this issue. For additional information, see Folder contents not visible in drive mounted on Mac OS 10.7 Adobe Drive 2.x

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The Adobe Connect Add-in is not officially supported for use with Mac OS 10.7. For more information, see Known issues with the Adobe Connect Add-in version 9.4.80.0 and Mac OS X Lion.

Contribute CS5, CS5.1

The moment you start playing the game, one of the first things you will notice is that there is a lag between the controller and what you see on your Mac screen.

• Contribute detects LPDF files as PDF files. An error message appears during publish.
• The Contribute plug-in crashes when you select text or add a highlight color outside the color panel in the Firefox browser (Contribute In Browser Editing).
• Publishing Content Type with metadata enabled results in Content Type being successfully published but the metadata is not created or populated. Such categories of XML files cannot be edited because validation fails on Lion.

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• The color picker does not select color outside the color picker dialog box.

For information, see the following articles:
Keychain contains multiple instances of Dreamweaver CS4 Mac OS 10.7 Lion
Color Picker returns incorrect sample color Dreamweaver CS4 Mac OS 10.7 Lion

In Fireworks CS4, the color picker doesn't reflect the color selected on canvas.

• Flash Builder 4.0.x doesn't work on Mac OS 10.7. Adobe does not intend to update this product for use on Mac OS 10.7.
• Flash Builder 4.5.x is compatible with Mac OS X 10.7, although issues can affect installation and product usage:
  • Before installing Flash Builder 4.5.1, install Java for Mac OS X 10.7. Otherwise, Flash Builder 4.5 is installed instead of 4.5.1. For instructions to install Java, see Install the Java runtime (JRE) Mac OS 10.7 Lion.
  • Flash Builder includes a version of Flash Player that is not recommended for use with Mac OS 10.7. Rather than installing the default version, download and install the latest debugger version.
  • Right-clicking in the package explorer can stop working after prolonged use of Flash Builder. To resolve the issue, restart Flash Builder.
• Flash Builder 4.6 for PHP when installed as a plug-in into Eclipse 3.7 is generally compatible with Mac OS 10.7. However, if you are using a stand-alone configuration of Flash Builder 4.6 for PHP (Flash Builder 4.6 integrated with Zend Studio), right-clicking in the Package Explorer is sometimes unresponsive. To resolve the issue, close and reopen Package Explorer. If the issue still exists, restart Flash Builder.

Flash Catalyst CS5 and CS5.5 are compatible with Mac OS 10.7. However, some issues affect usability of the product.

Adobe recommends using Flash Player 10.3.183.5 to get the best experience with Mac OS X Lion. In particular, this version resolves an issue with Flash Player settings panel not responding to clicks in Mac OS X Lion.

• Flash Pro CS4 doesn't work on Mac OS 10.7. Adobe doesn't intend to update this product for use on Mac OS 10.7 and recommends not using it on Mac OS 10.7.
• Flash Pro CS5 and CS5.5 are compatible with Mac OS 10.7.

In Illustrator CS5 and CS5.1, the option to save or export is disabled in the Save As Or Export dialog box if the save location is the desktop. SeeSave/Export button is disabled on OS 10.7 Illustrator CS5/CS5.1.

Photoshop Lightroom 3

• Canon EOS 5D, EOS 20D, and EOS 350D (Rebel XT/EOS Kiss Digital N) cameras no longer work with tethered shooting under Mac OS 10.7 in Lightroom 3. The list of supported cameras also contains cameras that do not work tethered and any exceptions that exist. See Tethered Camera Support (kb2.adobe.com/cps/842/cpsid_84221.html). For troubleshooting tethering issues, see Troubleshoot tether capture (http://kb2.adobe.com/cps/894/cpsid_89486.html).
• Some customers have reported inconsistent connectivity with Lightroom 3.4.1 and their Nikon cameras when using the tether function in Mac OS 10.6.8. Adobe is working on this issue, but recomments using Mac OS 10.6.7 until the issue is resolved. For more information, see Network volumes don't display in import dialog box after installing Mac OS X 10.7 (Lion) Lightroom 3.

Photoshop Lightroom 2.x

• Photoshop Lightroom 2.7 is verified to support Mac OS 10.7. Earlier versions were not tested, although they could run on Mac OS 10.7 without issues. However, Adobe recommends that you update to version 2.7. From within Photoshop Lightroom, chooseHelp > Check for Updates.
• Photoshop Lightroom 2.x doesn't install from the installation DVD. For details, see Lightroom 2 doesn't install under Mac OS X 10.6 and 10.7.

Workflows that are dependent on the Adobe Reader plug-in don't function.

• In Photoshop CS3, CS4, and CS5, droplets don't work. For details, see Droplets don't work Photoshop CS5, CS4, CS3.
• In Photoshop CS5, clicking inside a selection doesn't deselect it. For details, see Clicking inside a selection does not deselect it Mac OS X 10.7 (Lion) Photoshop CS5.
• Photoshop CS4 crashes dragging layers in the Layers panel. For details, see Photoshop CS4 crashes Dragging layers in Layers panel Mac OS 10.7
• Error occurs in Photoshop CS4 and CS3 at launch. For details, see Error: 'PowerPC applications no longer supported' occurs when launching Photoshop CS4 or CS3 Mac OS 10.7 (Lion)

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• In Adobe Premiere Elements 9, color artifacts appear in the Timeline area when moving clips within Timeline view.

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• In Adobe Premiere Pro CS5 and CS5.5, the Universal Counting Leader is missing countdown numbers. (This issue is fixed in the Adobe Premiere Pro CS5.5 (5.5.2) update.)
• In Adobe Premiere Pro CS5.5, the Timecode effect doesn't render a timecode overlay. (This issue is fixed in the Adobe Premiere Pro CS5.5 (5.5.2) update.)
• In Adobe Premiere Pro CS5, the Eyedropper tool (for example, for the Ultra Key effect) does not behave correctly on a system with multiple monitors with different vertical resolutions.
• In Adobe Premiere Pro CS5.5, the Eyedropper tool (for example, for the Ultra Key effect) does not behave correctly. (This issue is fixed in the Adobe Premiere Pro CS5.5 (5.5.2) update.)
• CUDA processing (Mercury Playback Engine Hardware Acceleration) is disabled under some circumstances. See 'Adobe Premiere Pro, Nvidia CUDA drivers, and Mac OSX v10.7 (Lion)' for more information.