53 lines
1.4 KiB
Java
53 lines
1.4 KiB
Java
import proguard.annotation.*;
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/**
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* This application illustrates the use of annotations for configuring ProGuard.
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*
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* You can compile it with:
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* javac -classpath ../lib/annotations.jar NativeCallBack.java
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* You can then process it with:
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* java -jar ../../../lib/proguard.jar @ ../examples.pro
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*
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* The annotation will preserve the class and its main method,
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* as a result of the specifications in lib/annotations.pro.
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*/
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@KeepApplication
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public class NativeCallBack
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{
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/**
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* Suppose this is a native method that computes an answer.
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*
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* The -keep option for native methods in the regular ProGuard
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* configuration will make sure it is not removed or renamed when
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* processing this code.
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*/
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public native int computeAnswer();
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/**
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* Suppose this method is called back from the above native method.
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*
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* ProGuard would remove it, because it is not referenced from java.
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* The annotation will make sure it is preserved anyhow.
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*/
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@Keep
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public int getAnswer()
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{
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return 42;
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}
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/**
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* The main entry point of the application.
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*
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* The @KeepApplication annotation of this class will make sure it is not
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* removed or renamed when processing this code.
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*/
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public static void main(String[] args)
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{
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int answer = new NativeCallBack().computeAnswer();
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System.out.println("The answer is " + answer);
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}
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}
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