JDK Download 6: How to Install and Use the Java Development Kit
If you are interested in developing and running Java applications, you will need to download and install the Java Development Kit (JDK). The JDK is a software package that contains the tools and libraries you need to create, compile, and execute Java programs. In this article, we will show you how to download JDK 6 from Oracle, how to set it up on your system, and how to use it to develop and run Java applications.
What is JDK and why do you need it?
The JDK stands for Java Development Kit. It is a collection of software components that enable you to create, compile, and run Java applications. The JDK includes:
jdk download 6
The Java Runtime Environment (JRE), which provides the basic components for running Java programs, such as the Java Virtual Machine (JVM), the core libraries, and the Java launcher.
The Java compiler (javac), which converts Java source code into bytecode that can be executed by the JVM.
The Java debugger (jdb), which allows you to find and fix errors in your Java code.
The Java documentation generator (javadoc), which creates HTML files that document your Java code.
The Java archive tool (jar), which creates compressed files that contain your Java classes and resources.
Other tools and utilities, such as the applet viewer, the security manager, the policy tool, and the keytool.
You need the JDK if you want to develop and run your own Java applications. The JDK provides you with the tools and libraries you need to create, compile, debug, test, and document your Java code. The JDK also allows you to run existing Java applications that require a specific version of the JRE.
JDK vs JRE vs JVM
As mentioned above, the JDK includes the JRE, which in turn includes the JVM. These are three related but distinct terms that are often confused by beginners. Here is a brief explanation of each term:
The JVM is the Java Virtual Machine. It is a software layer that interprets and executes Java bytecode on different platforms. The JVM provides an abstraction layer that makes Java programs portable across different operating systems and hardware architectures.
The JRE is the Java Runtime Environment. It is a software package that contains the JVM and other components that are required to run Java applications. The JRE includes the core libraries, such as java.lang, java.util, java.io, java.net, etc., that provide essential functionality for Java programs. The JRE also includes other components, such as the security manager, the class loader, and the garbage collector.
The JDK is the Java Development Kit. It is a software package that contains the JRE and other tools that are required to develop Java applications. The JDK includes the compiler, the debugger, the documentation generator, and other utilities that help you create, compile, debug, test, and document your Java code.
Benefits of using JDK
Using the JDK has many benefits for developers who want to create and run Java applications. Some of these benefits are:
The JDK is free to download and use for personal and commercial purposes.
The JDK supports multiple versions of Java, from Java SE 6 to Java SE 16. You can choose the version that suits your needs and preferences.
The JDK provides a consistent and reliable environment for developing and running Java applications. The JDK ensures that your Java code is compatible with the Java specifications and standards.
The JDK offers a rich set of tools and libraries that enable you to create, compile, debug, test, and document your Java applications. The JDK helps you improve the quality and performance of your Java code.
The JDK supports various features and functionalities that make Java a powerful and versatile programming language. The JDK supports object-oriented, functional, concurrent, generic, reflective, and modular programming paradigms. The JDK also supports various APIs and frameworks that allow you to create web, desktop, mobile, embedded, and enterprise applications.
How to download JDK 6 from Oracle
If you want to download JDK 6 from Oracle, you will need to follow these steps:
Check your system requirements
Before you download JDK 6 from Oracle, you will need to make sure that your system meets the minimum requirements for running the JDK. According to Oracle, the system requirements for JDK 6 are:
Operating System
Processor
Memory
Disk Space
Windows XP/Vista/7/8/10 (32-bit or 64-bit)
Pentium 2 266 MHz or higher
128 MB or higher
150 MB for JRE; 250 MB for JDK
Linux (32-bit or 64-bit)
Pentium 2 266 MHz or higher
128 MB or higher
90 MB for JRE; 180 MB for JDK
Solaris (SPARC or x86)
UltraSPARC IIi 270 MHz or higher; Pentium 2 266 MHz or higher
256 MB or higher
130 MB for JRE; 210 MB for JDK
Mac OS X (Intel)
Intel Core Duo or higher
512 MB or higher
80 MB for JRE; 160 MB for JDK
Choose the right version and file type
Once you have checked your system requirements, you will need to choose the right version and file type of JDK 6 from Oracle. You can download JDK 6 from Oracle's website, where you will find different versions and file types of JDK 6 for different platforms. For example, if you are using Windows, you can choose between:
jdk download 6 oracle
jdk download 6 for windows 10
jdk download 6 for mac
jdk download 6 for linux
jdk download 6 for windows 7
jdk download 6 free
jdk download 6 zip
jdk download 6 update 45
jdk download 6 32 bit
jdk download 6 64 bit
jdk download 6 offline installer
jdk download 6 latest version
jdk download 6 archive
jdk download 6 rpm
jdk download 6 exe
jdk download 6 solaris
jdk download 6 ubuntu
jdk download 6 debian
jdk download 6 centos
jdk download 6 redhat
jdk download 6 fedora
jdk download 6 suse
jdk download 6 java se
jdk download 6 java ee
jdk download 6 java me
jdk download 6 netbeans
jdk download 6 eclipse
jdk download 6 intellij idea
jdk download 6 android studio
jdk download 6 tomcat
jdk download 6 weblogic
jdk download 6 websphere
jdk download 6 glassfish
jdk download 6 wildfly
jdk download 6 spring boot
jdk download 6 maven
jdk download 6 gradle
jdk download 6 ant
jdk download 6 junit
jdk download 6 selenium
jdk download 6 swing
jdk download 6 awt
jdk download 6 javafx
jdk download 6 servlets
jdk download 6 jdbc
jdk download 6 hibernate
jdk download 6 spring framework
jdk download 6 struts framework
jdk download 6 jsf framework
JDK 6 Update 45 with JavaFX: This is the latest update of JDK 6 that includes JavaFX, which is a platform for creating rich internet applications. This file type is an executable file (.exe) that will launch an installer wizard.
JDK 6 Update 45: This is the latest update of JDK 6 without JavaFX. This file type is also an executable file (.exe) that will launch an installer wizard.
JDK 6 Update 45 (64-bit): This is the latest update of JDK 6 for 64-bit systems without JavaFX. This file type is also an executable file (.exe) that will launch an installer wizard.
JDK-6u45-windows-i586.zip: This is a compressed file (.zip) that contains the JDK files without an installer. You will need to extract this file and manually set up the JDK on your system.
JDK-6u45-windows-x64.zip: This is a compressed file (.zip) that contains the JDK files for 64-bit systems without an installer. You will need to extract this file and manually set up the JDK on your system.
You can choose the version and file type that best suits your needs and preferences. You can also download older versions of JDK 6 from Oracle's archive site, but they may not have the latest security updates and bug fixes.
Follow the installation instructions
After you have chosen the right version and file type of JDK 6 from Oracle, you will need to follow the installation instructions to install the JDK on your system. The installation instructions may vary depending on the file type you have downloaded, but generally, they involve these steps:
Download the JDK file from Oracle's website and save it to a location on your system.
If you have downloaded an executable file (.exe), double-click on it to launch the installer wizard. Follow the prompts and accept the license agreement to install the JDK on your system.
If you have downloaded a compressed file (.zip), extract it to a location on your system. You will need to manually set up the JDK on your system by setting some environment variables (see below).
Restart your system to apply the changes.
How to set up JDK 6 on your system
After you have installed JDK 6 on your system, you will need to set up some environment variables to make sure that your system can recognize and use the JDK. The environment variables are:
Set the JAVA_HOME environment variable
The JAVA_HOME environment variable is used to specify the location of the JDK on your system. To set the JAVA_HOME environment variable, you will need to do the following:
Find out where the JDK is installed on your system. The default location is usually C:\Program Files\Java\jdk1.6.0_45 or C:\Program Files (x86)\Java\jdk1.6.0_45, depending on your system architecture.
Right-click on My Computer or This PC and select Properties.
Select Advanced System Settings or Advanced.
Select Environment Variables.
Under System Variables, click New.
Enter JAVA_HOME as the variable name and enter the path to the JDK as the variable value. For example, C:\Program Files\Java\jdk1.6.0_45.
Click OK to save the changes.
Add the JDK bin directory to the PATH variable
The PATH environment variable is used to specify a list of directories where executable files are located. To add the JDK bin directory to the PATH variable, you will need to do the following:
Find out where the JDK bin directory is located on your system. The default location is usually C:\Program Files\Java\jdk1.6.0_45\bin or C:\Program Files (x86)\Java\jdk1.6.0_45\bin, depending on your system architecture.
Right-click on My Computer or This PC and select Properties.
Select Advanced System Settings or Advanced.
Select Environment Variables.
Under System Variables, select PATH and click Edit.
Add a semicolon (;) at the end of the existing value and then enter the path to the JDK bin directory. For example, ;C:\Program Files\Java\jdk1.6.0_45\bin.
Click OK to save the changes.
Verify the installation
To verify that you have successfully installed and set up JDK 6 on your system, you can do the following:
Open a command prompt or a terminal window.
Type javac -version and press Enter. You should see something like javac 1.6.0_45, which indicates that you have installed JDK 6 Update 45.
Type java -version and press Enter. You should see something like java version "1.6.0_45", which indicates that you have installed JRE 6 Update 45.
How to use JDK 6 to develop and run Java applications
Now that you have installed and set up JDK 6 on your system, you can use it to develop and run Java applications. Here are some basic steps to do so:
Use the javac command to compile Java source code
The javac command is used to compile Java source code into bytecode that can be executed by the JVM. The javac command takes one or more Java source files as input and produces one or more Java class files as output. To use the javac command, you will need to do the following:
Create a Java source file with a .java extension. For example, HelloWorld.java.
Write your Java code inside the Java source file. For example, public class HelloWorld public static void main(String[] args) System.out.println("Hello, world!"); .
Open a command prompt or a terminal window and navigate to the directory where your Java source file is located.
Type javac HelloWorld.java and press Enter. This will compile your Java source code into a Java class file named HelloWorld.class.
If there are no errors, you will see no output. If there are errors, you will see error messages indicating the line number and the cause of the error.
Use the java command to run Java bytecode
The java command is used to run Java bytecode on the JVM. The java command takes one or more Java class files as input and executes them on the JVM. To use the java command, you will need to do the following:
Make sure that you have compiled your Java source code into Java class files using the javac command.
Open a command prompt or a terminal window and navigate to the directory where your Java class files are located.
Type java HelloWorld and press Enter. This will run your Java class file on the JVM and display the output. For example, Hello, world!.
If there are no errors, you will see the output of your Java program. If there are errors, you will see exception messages indicating the type and the cause of the error.
Use the other tools in the JDK for debugging, testing, and documentation
The JDK provides other tools and utilities that can help you debug, test, and document your Java applications. Some of these tools are:
The Java debugger (jdb), which allows you to set breakpoints, inspect variables, evaluate expressions, and control the execution flow of your Java program.
The Java documentation generator (javadoc), which creates HTML files that document your Java code based on comments and annotations in your source files.
The Java archive tool (jar), which creates compressed files that contain your Java classes and resources.
The applet viewer (appletviewer), which allows you to view and test applets without using a web browser.
The security manager (java -Djava.security.manager), which allows you to enforce security policies on your Java applications.
The policy tool (policytool), which allows you to create and edit security policy files.
The keytool (keytool), which allows you to create and manage cryptographic keys and certificates.
Conclusion and FAQs
In this article, we have shown you how to download JDK 6 from Oracle, how to set it up on your system, and how to use it to develop and run Java applications. We hope that this article has helped you understand the basics of JDK 6 and how to use it for your Java projects. If you have any questions or comments, please feel free to leave them below. Here are some FAQs that may also help you:
Q: What is the difference between JDK 6 and JDK 7?
A: JDK 7 is a newer version of JDK that introduces some new features and enhancements over JDK 6. Some of these features are:
Support for dynamic languages with the invokedynamic bytecode instruction.
Support for strings in switch statements.
Support for binary literals and underscores in numeric literals.
Support for try-with-resources statements that automatically close resources.
Support for multiple exception handling with a single catch block.
Support for diamond syntax for generic type inference.
Support for NIO.2, which provides improved file system and network support.
Support for Fork/Join framework, which provides parallel programming support.
Q: How can I update JDK 6 to the latest version?
A: You can update JDK 6 to the latest version by downloading and installing the latest update from Oracle's website. The latest update of JDK 6 is JDK 6 Update 45, which was released in April 2013. You can download it from here:
Q: How can I uninstall JDK 6 from my system?
A: You can uninstall JDK 6 from your system by following these steps:
Open the Control Panel and select Programs and Features or Add or Remove Programs.
Find Java SE Development Kit 6 Update 45 or the version you have installed and click Uninstall or Remove.
Follow the prompts and confirm the uninstallation.
Restart your system to apply the changes.
Q: How can I switch between different versions of JDK on my system?
A: You can switch between different versions of JDK on your system by changing the JAVA_HOME and PATH environment variables. For example, if you have JDK 6 and JDK 7 installed on your system, you can switch between them by doing the following:
Open a command prompt or a terminal window and type set JAVA_HOME=C:\Program Files\Java\jdk1.7.0_80 and press Enter. This will set the JAVA_HOME environment variable to point to JDK 7.
Type set PATH=%JAVA_HOME%\bin;%PATH% and press Enter. This will add the JDK 7 bin directory to the PATH environment variable.
Type java -version and press Enter. You should see something like java version "1.7.0_80", which indicates that you are using JDK 7.
To switch back to JDK 6, repeat the same steps but replace jdk1.7.0_80 with jdk1.6.0_45.
Q: How can I learn more about JDK 6 and Java programming?
A: You can learn more about JDK 6 and Java programming by visiting these resources:
The official Java website:
The official Java documentation:
The official Java tutorials:
The official Java forums:
The official Java blog:
The official Java podcast:
The official Java magazine:
44f88ac181
コメント