NetBeans IDE 7.2.1 cannot access java.lang Fatal Error: Unable to find package java.lang in classpath or bootclasspath

The project has an old hotspot, in Netbeans:

• Right click the project
• properties
• libraries
• update "Java Platform"

Not exclusive to Android, this happened to me while trying to compile a very old project.

I just found what the problem was.

1. I updated this path to my correct path sdk.dir=E:\\ANDROID\\Eclipse371\\android-sdk in project file local.properties.

2. I updated project.properties file # Project target.target=android-8, to target 8 I had 7 before that obviously does not supported in this version of SDK.

and I successfully build my project :)