Download Java Sdk For Mac Terminal

| 13-05-2021
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The following are the system requirements for installing the JDK and the JRE on macOS:

  • Any Intel-based computer running macOS.

  • Administrator privileges.

    You cannot install Java for a single user. Installing the JDK and JRE on macOS is performed on a systemwide basis for all users. Administrator privileges are required to install the JDK and JRE on macOS.

  • When you install the JDK, it also installs the JRE. However, the system will not replace the current JRE with a lower version.

    To determine the current JRE version installed on your system, see Determining the JRE Version Installed on macOS. To install an earlier version of the JRE, you must first uninstall the current version. See Uninstalling the JRE on macOS.

  • When you install the JRE, you can install only one JRE on your system at a time. The system will not install a JRE that has an earlier version than the current version.

    To determine the current JRE version installed on your system, see Determining the JRE Version Installed on macOS. To install an earlier version of the JRE, you must first uninstall the current version. See Uninstalling the JRE on macOS.

    Note:

    Installing a JRE from Oracle will not update java -version symlinks or add java to your path. To do this, you must install the JDK.

I was trying to install from the command line but could not find a pkg installer online any more. I saw that JavaAppletPlugin.pkg in the DMG but thought it was not what I wanted because the name is misleading. I tried using installer the way you did but it hung just like the GUI version. I forced quit it and used the options I had used before with pkg installers and this worked: installer.

Java and the Mac OS X Terminal

  1. The installation is simple: open the.dmg installation file and click on the.pkg file within. Verify the installation by opening the Terminal from the System Utilities, and at the terminal prompt type: $ java -version $ javac -version to verify that the correct JDK version is in use.
  2. . Download Java (JDK/SDK) version.tar.gz file that you need for macOS from OpenJDK site into default '/Downloads' folder, & verify its authenticity by comparing the OpenJDK site's shown SHA256 digest code, with the locally computed SHA256 digest code.


This page is obsolete.


This document instructs you on how to use the Mac OS X Terminal with Java.

Java
Java

You will use the Java compiler javac to compile your Java programs andthe Java interpreter java to run them.To verify that Apple's implementation of Java 2 Standard Edition (Java SE 6) isalready installed:

  • Run Software Update.
  • Run Applications/Utilities/Java/Java Preferencesand verify that the Java SE 6 - 64-bit entry is checked andfirst in the list; if not, drag to change the preferred order.
Command-line interface

You will type commands in an application called the Terminal.

  • 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 are running the right version of Java, typethe commands in boldface below. You should see something similar to the information printed below. The importantpart is that it says 1.6 or 1.5 (and not 1.4).
    Then type
  • Since you will be using the Terminal frequently, you may want tocustomize the default window settings (e.g., Monaco 13pt font with antialiasing).
Compile the program

You will use the javac command to convert your Java program into a form moreamenable for execution on a computer.

  • From the Terminal, navigate to the directory containing your .javafiles, say ~wayne/introcs/hello, by typing the cd commandbelow.
  • Assuming the file, say HelloWorld.java is in the currentworking directory, type the javac command below to compile it.
    If everything went well, you should see no error messages.
Execute the program

You will use the java command to execute your program.

  • From the Terminal, type the java command below.If all goes well, you should see the output of the program -Hello, World.
Download Java Sdk For Mac Terminal
Input and Output

If your program gets stuck in an infinite loop, type Ctrl-c to break out.

If you are entering input from the keyboard, you can signifyto your program that there is no more data by typingCtrl-d for EOF (end of file).You should type this character on its own line.

Troubleshooting

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

If this works, your classpath is set incorrectly.

I get the error 'class file has wrong version 50.0, should be 49.0' when I compilefrom the Terminal. What does this mean?It's probably because DrJava is configured to use Java 6.0 and and your Terminal is configured to use Java 5.0.To change the default version of Java in your Terminal, launchJava Preferencest. Drag the Java SE 6 - 64-bit entryto appear first.

Java Sdk Download Mac

How do I get the menu to display at the topof the screen instead of at the top of the frame?Execute with java -Dapple.laf.useScreenMenuBar=true

Download Jdk Mac Terminal

Where can I learn more about the command line?Here is a short tutorial on thecommand-line.