CODEWITHSUNDEEP
javanetbeansjava-7java-6
Ayvadia
Ayvadia

Reputation: 339

Downgrading from Java 7 to Java 6

For whatever reason I had to change pc's as a result of the change I now have to use Java 6 (the final update) Instead of java 7. When importing my existing project to Java 6 I get the following error in my auto generated code that was generated by Netbeans and is not modifiable

cannot find symbol

symbol: variable Type

location: class Window

    frame.setType(java.awt.Window.Type.POPUP); //Type is underlined

The output for the error is as follows:

javac: invalid target release: 1.7
Usage: javac <options> <source files>
use -help for a list of possible options
C:\Users\Adminstrator\Downloads\NetBeansProjects\NetBeansProjects\Pat0.3\nbproject\build-impl.xml:915: The following error occurred while executing this line:
C:\Users\Adminstrator\Downloads\NetBeansProjects\NetBeansProjects\Pat0.3\nbproject\build-impl.xml:268: Compile failed; see the compiler error output for details.

What does this do? Is it necessary, would deleting that the component help? Which component is it, is there a quick fix?

Upvotes: 0

Views: 1277

Answers (2)

A4L
A4L

Reputation: 17595

There is somewhere in your project a setting for the java compiler that tells it to generate classes for jre7. javac from jdk6 cannot generate classes for that version, hence the error. So you should look into the properties of your project and set up javac to generate classes for jr6. You might also have fix some of your non-generated code if for example you have used features that came with java 7 such as diamond operator or multy catch block etc.

Also the javadoc for Window.Type states it is available only since 1.7. You might want to re-generate that code or better yet just install jdk7.

Upvotes: 0

roippi
roippi

Reputation: 25974

Your build.xml specifies the target="1.7" flag to javac, which java 6 doesn't know how to interpret. Changing it to 1.6 will technically get past that error.

However, the enum Window.Type was added in Java 7, so you simply can't expect changing the target to work; your project's source uses Java 7 features. I'm sure that's not the only one.

Your options are therefore to methodically go through and remove/replace all Java 7 code (likely introducing some bugs) or just to.. install Java 7.

Upvotes: 2

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