1. Java For Mac Os
  2. Download Java For Mac Os
  3. Java 1.5 Mac Os X Download Mac

Java jdk 1 5 free download - Apple Java for OS X 10.5, Apple Mac OS Update 8.6, Apple Mac OS Update 9.0.4, and many more programs.

An error “you need to install the legacy Java SE 6 runtime”, is encountered when you open any Adobe application.

With Mac OS 10.7 (Lion) and later, the Java runtime is no longer installed automatically as part of the OS installation. Follow any of the methods below to install Java runtime.

You can download and install the latest Java runtime from the Java website - Download Free Java Software.


On Mac OS 10.10 (Yosemite), when you launch any Adobe product, you might receive a warning 'The Application has been moved and its path has been changed...'.

Click Repair Now or Update button to update the location and resolve the issue. When prompted for password, enter your system password to complete.

If Java runtime is not installed, you are prompted to install when you first launch any Adobe product. Follow the onscreen instructions in the Java required notification dialog box to install.

Use the following method to initiate the Java runtime installation or confirm if it is installed.

  1. Go to Applications > Utilities > Java Preferences.
  2. If Java is not installed, you receive the following message: “To open “Java Preferences,' you need a Java runtime. Would you like to install one now?”

  3. Click Install and accept the license agreement. The Java runtime is downloaded and installed.

Many Adobe applications depend on the Oracle Java Runtime Environment (JRE) for some features to work. Apple recently changed the way it includes Java in Mac OS, and with Lion, Java is no longer preinstalled. It is now an optional install that you must select.

Since current Adobe installers and applications were built before these changes by Apple, Adobe software anticipates that Java is installed. Adobe and Apple have worked together to ensure that you can install Java at OS install time. Or it can be installed later before you install Adobe applications. At runtime, when you launch an Adobe application, you are prompted to install Java if it is not already installed. If you do not install Java before running an Adobe application, there can be missing or improperly behaving features. If you encounter any issues, install Java to correct the problems. Adobe recommends that corporate IT organizations pre install Java (or make sure that Java can be installed through their firewalls/security) to avoid conflicts with Adobe applications.


If the Java runtime is not installed, some issues that are known to occur include -

  • Failure to launch.
  • Install Java runtime prompts when you attempt to use the applications.
  • Applications hang or quit.

Hello, World in Java 1.5 on Mac OS X

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This document instructs you on how to setup a Java programmingenvironment for your Mac OS X computer and provides a step-by-stepguide for creating, compiling, and executing a Java program.You must be using Mac OS X v 10.4.2 Tiger or later.(Previous versions do not support Java 1.5.)All of the software is freely available on the Web.


You will use the Java compiler javac to compile your Java programs andthe Java interpreter java to run them.Mac OS X includes Apple's implementation of Java 2 Standard Edition (J2SE) 1.5.0.so there is nothing to do in this step except to run Software Updateif you're not up-to-date.

Command line interface

You will type commands in an application called the Terminal.You might enjoy reading Neal Stephenson's light-heartedessay In the Beginningwas the Command Line.

  • Open a terminal window. You can find this underGo -> Applications -> Utilities. Drag the Terminal to your dock sinceyou will be using it frequently.
  • You should now have a Terminal window somewhere on the screen.It will have a prompt that looks something like:
  • To check that you have the right version of Java installed, typethe commands in boldface below.
    If Java is installed, you should see something like:
    Then type
    You should see something like:
  • Now, create a directory to store your Java programs.In the Terminal, type the commands in boldface below:
    The mkdir command creates a new directory;the cd command changes the current working directory.After executing these commands, your working directoryis the newly created ~/introcs/hello. All of yourfiles for Assignment 0 will go here.Don't be intimidated by the Terminal - you will only need to use afew basic commands. Keep this window open since you will need it laterin the assignment.
  • Since you will be using the Terminal frequently, you may want tocustomize the default window settings (e.g.,Monaco 13pt font with antialiasing).

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Text Editor

You will type and edit your programs in a text editor called JEdit.JEdit is similar to conventional word processors like MS Word,but it features many specialized programming tools includingsyntax highlighting, bracket matching, auto indenting, indentshifting, line numbering, and commenting out code.

  • Downloadthe latest stable version of JEdit using the MacOSX package link.
  • We strongly recommend the following JEdit customizations.
    • Enable Mac OS style menubar inPlugins -> Plugin Options -> Enable Mac OS Menubar
    • Change the default indentation to 4 spaces viaUtilities -> Global Options -> Editing -> Indent Width, Utilities -> Global Options -> Editing -> Tab Width, andUtilities -> Global Options -> Editing -> Soft (emulated with spaces) tabs.
    • Change the default edit mode to Java usingUtilities -> Global Options -> Editing -> Default edit mode-> Java.
    • Change the default tab width when printing to four spaces viaUtilities -> Global Options -> Printing -> Tab width when printing
    • Add line numbers by checking Utilities -> Global Options -> Gutter -> Line Numbering
    • Allow at most 80 characters per line byUtilities -> Global Options -> Editing -> Word wrap -> hard andUtilities -> Global Options -> Editing -> Wrap margin -> 80.
    • Change the default line separator to Unix viaUtilities -> Global Options -> General -> Default Line Separator
    • Remove the annoying . that marks the end of a line by uncheckingUtilities -> Global Options -> Text Area -> End of Line Markers
  • To associate .java files with JEdit so that when you double-click a .java file,it opens it in JEdit:
    • Right click a .java file.
    • Choose Open With...
    • Select JEdit from the list of programs or locate JEdit by selecting Otherif necessary.
    • Check the Always use this program to open this file type box
Apple purists may prefer Project Builder which can be found in the Findervia Computer -> OS X Partition -> Developer -> Applications -> Project Builder.
Create the program

Now you are ready to write your first Java program.

  • Launch JEdit Start -> jEdit.Begin by saving the empty document: SelectFile -> Save As, choose the directory /Users/username/introcs/helloand type in the file name HelloWorld.java.The file name is case sensitive and must exactly match the name of the classin the Java program. Don't forget to include the .java extension in thefile name. By doing this, JEdit will know you are working on a Javafile, and it will format it appropriately.
  • Now, in the JEdit window, type the Java program HelloWorld.javaexactly as it appears below.If you omit even a semicolon, the program won't work.
  • Finally, save the file usingFile -> Save.
Compile the program

It is now time to convert your Java program into a form moreamenable for execution on a computer.

  • From the Terminal, type
  • If everything went well, you should see the followingin the Terminal:
    Silence is golden in computer science.If javac complains in some way, you mistyped something, and you should check your program carefully. Ask for help if you can't see the mistake.
Execute the program

Now it is time to run your program. This is the fun part.

  • At the Terminal, type
  • If all goes well, you should see
  • You may need to repeat this edit-compile-execute cycle a few times before it all goes smoothly.Use the up and down arrow keys to repeat previous commands and avoid extra typing.
Congratulations, you are now a Java programmer!To continue, return to to theIntroduction to Computer Science booksite.

Java 1.5 Mac Os X Download Mac

When I try to run java I get: Exception in thread 'main' java.lang.NoClassDefFoundError.First, be sure that HelloWorld.class is in the current directory.Be sure to type java HelloWorld without a trailing .classor .java.If this was not your problem, it's possiblethat your CLASSPATH was set by some other program so that it no longerincludes the current working directory.Try running your program with the command line