Right-click on your project in the Package Explorer and select 'Build Path' > 'Configure Build Path'.To update the JRE System Library in Eclipse IDE, follow the steps below: Then, we remove the old JRE System Library from the project's classpath and add the new JRE System Library using JavaRuntime.getDefaultJREContainerEntry(). In this example, we first get the project and create a Java project object. Click 'Apply and Close' to save the changes.Select the desired Java version from the list and click 'Finish'.Click on the 'JRE System Library' entry and click 'Edit'.In the Properties window, go to 'Java Build Path' and select the 'Libraries' tab.Right-click on the project that is giving the error and select 'Properties'.Back in the 'Installed JREs' window, select the desired Java version and click 'Apply and Close'.In the 'JRE home' field, enter the path to the desired Java version and click 'Finish'.If the desired Java version is not listed, click on 'Add' and select 'Standard VM', then click 'Next'.In the Preferences window, expand the 'Java' section and click on 'Installed JREs'.Open Eclipse and go to the 'Window' menu, then click on 'Preferences'.To update the Java version in Eclipse, follow the steps below: Method 1: Updating Java Version in Eclipse

In this article, we will discuss various methods to resolve this error. This can lead to issues with compiling and running the code. This error occurs when the project build path is set to use a specific Java version, but the installed Java runtime environment is not compatible with the specified version. However, sometimes users may encounter issues with the IDE such as the 'Error: Build path specifies execution environment Java SE 1.7' error. Eclipse is one of the most popular integrated development environments (IDEs) used by Java developers.

Java jdk 7