In Eclipse you want to navigate to the source code of standard class String, and you get the following message: Source not found
Solution
(1) Install JDK in your laptop, and then configure it into Windows->Preferences->Java->Installed JRE. Delete existing entry for JRE:
And click Add… button:
Add JDK instead:
Once added, set JDK as default entry:
(2) Preferences->Java Build Path, remove existing entry of JRE:
Click Add Library button:
Choose JDK instead:
Once done, you can now navigate to the source code of standard class like String now.
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