Eclipse For Java 1.8

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Written by Nam Ha Minh
Last Updated on 21 April 2020 Print Email
In this post, I will show you how to change Java version used to compile a project in Eclipse IDE. For example, you have to maintain an Eclipse project was developed at the time of Java 1.8. Now you want to upgrade the project to be compiled with Java 11.To summary, here are the steps to change Java compiler version for a project in Eclipse IDE:

Eclipse Java 1.8.0 (64 Bit)

JRE 8 apps in eclipse workspace is possible by having the jre 8 jdk. It is true that in order to use eclipse 2020-09 you need java 11+ jdk/jre, but making projects that support jre 8 is still possible.Even I still use 2020-06 and before. Use png with transparent icon in the about dialog of Java EPP (and others if applicable) NEW: 530698: Using weka api: NEW: 526611: win64 version missing: NEW: 498457: FileNotFoundException: org.eclipse.ui3.108.0.v201.jar: NEW: 489296: Improve out-of-box experience for non-english locales: NEW: 386806: New Eclipse Icon not used. JavaFX with Eclipse. Now, we need to configure Eclipse to execute the JavaFX applications. There are two ways of Eclipse Configuration for this purpose. We can either export the JavaFX jar files to every Java project or install a new software which can support the JavaFX project creation directly. In this part, we will look at both the ways. The IBM Development Package for Eclipse is an unsupported tool that provides a development environment enabling developers to build and run Java ™ applications out of the box. The package includes the Eclipse platform with the IBM SDK, Java Technology Edition, Version 8 and is suitable for 32-bit and 64-bit on Windows systems. Hon gateway chair.

  1. Install JRE/JDK that supports the Java version you want to use.
  2. Add that JRE/JDK to Eclipse’s list of installed JREs
  3. Update Java Build Path for the project, pointing to the new JRE/JDK
  4. Change Java compiler compliance level.
You can skip the steps 1 and 2 if your project is already configured with JRE/JDK that supports the Java version to which you want to change.Before going into each step in details, I think it’s worth to understand some background information first.You know, JDK provides the javac tool for compiling Java source code but Eclipse doesn’t use javac. Instead, Eclipse uses its own internal compiler to provide more advanced features like incremental compilation – for quickly compiling only small changes you have made – not recompile the full project.And Eclipse compiler requires JRE to run its compiled .class files. That’s why it’s not necessarily to have JDK to use Eclipse - just JRE is enough.Note that the JRE that runs Eclipse IDE is not necessarily the one that is used by Eclipse compiler. You can have your Eclipse running under JRE 11 but the project is compiled with JRE 8.Now, suppose that you have a project that is set to compile with Java 1.8. To know Java compiler settings, right-click on the project and click Properties

Eclipse For Java 1.8 Downloads

Eclipse For Java 1.8. In the Properties dialog, navigate to Java Compiler section and you will see the following screen:

To change version of Java compiler for your project, uncheck “Use compliance from execution environment…”, the you can choose Java version from the dropdown list as below:Change compiler compliance level from 1.8 to 11 – you will see a warning from Eclipse:This warning means that no compatible JRE for Java 11 configured in Eclipse. So click the hyperlink Installed JREs, which pops up the following dialog:Click Add button. The next popup dialog appears:Make sure Standard VMEclipse for java 1.8 downloads is selected, and click Next. And in the next screen, click Directory to browse to JDK home or JRE home that supports the Java compiler version you want:Here, you can see I choose JDK 14 home directory. Click Finish. And check the newly added JRE/JDK:Click Apply and Close. Now in the project properties dialog, navigate to the Eclipse compatible with jdk 8

Eclipse Compiler For Java 1.8

Java Build Path section:Select the JRE under Classpath and click Edit. Now, in the popup screen you can choose the execution environment for the JDK that supports the Java version you want to compile your project:Click Finish, and click Apply and close to apply compiler setting change and dismiss the project properties dialog. Then you’re all set.EclipseNOTES: The Java compiler compliance level you can set depends on the version of Eclipse’s internal compiler. For example, Eclipse 2018-12 supports compilation of Java 11 and older versions even when you set to use JRE 14.Watch the video:

Eclipse Java 1.8 Support

Other Eclipse Tutorials:


About the Author:

Nam Ha Minh is certified Java programmer (SCJP and SCWCD). He started programming with Java in the time of Java 1.4 and has been falling in love with Java since then. Make friend with him on Facebook and watch his Java videos you YouTube.