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NetBeans 5.5 is not available from the current NetBeans website but is safely preserved in the Apache archives. Follow the instructions above strictly using JDK 5.0. For any new development, use NetBeans 12+ or a modern IDE.
To add modules like the Sun Java System Web Server 7.0 , use the "Install Manually Downloaded Modules" option in the IDE's Tools menu. Netbeans 5.5 Download
Deep integration with Sun Java System Application Server PE 9 (Glassfish), enabling one-click deployment for modern enterprise standards. NetBeans 5
An industry-leading visual editor for Swing applications, allowing "drag-and-drop" design of professional desktop interfaces. To add modules like the Sun Java System Web Server 7
NetBeans 5.5, originally released in late 2006, is a legacy version of the IDE that predates the Apache software foundation's stewardship. Official sources like Apache NetBeans no longer provide direct downloads for these pre-Apache versions.
Why would anyone choose 5.5 over a modern release? Here is a frank comparison.
Follow this exact procedure to avoid crashes: