1. fixed for java17

Signed-off-by: pengzhile <pengzhile@gmail.com>

README.md

@@ -1,4 +1,4 @@
-# ja-netfilter 2022.1.0
+# ja-netfilter 2022.2.0
 
 ### A javaagent framework
 
@@ -10,6 +10,12 @@
     * some apps support the `JVM Options file`, you can add as a line of the `JVM Options file`.
     * **WARNING: DO NOT put some unnecessary whitespace characters!**
 * or execute `java -jar /path/to/ja-netfilter.jar` to use `attach mode`.
+* for **Java 17** you have to add at least these `JVM Options`:
+
+  ```
+  --add-opens=java.base/jdk.internal.org.objectweb.asm=ALL-UNNAMED
+  --add-opens=java.base/jdk.internal.org.objectweb.asm.tree=ALL-UNNAMED
+  ```
 
 * edit your plugin config files: `${lower plugin name}.conf` file in the `config` dir where `ja-netfilter.jar` is located.
 * the `config`, `logs` and `plugins` directories can be specified through **the javaagent args**.

pom.xml

@@ -6,7 +6,7 @@
 
     <groupId>com.ja-netfilter</groupId>
     <artifactId>ja-netfilter</artifactId>
-    <version>2022.1.0</version>
+    <version>2022.2.0</version>
 
     <name>ja-netfilter</name>
     <description>A javaagent framework</description>

src/main/java/com/janetfilter/core/Initializer.java

@@ -26,6 +26,7 @@ public class Initializer {
             }
 
             try {
+                c.getGenericSuperclass();
                 inst.retransformClasses(c);
             } catch (Throwable e) {
                 DebugInfo.error("Retransform class failed: " + name, e);

src/main/java/com/janetfilter/core/Launcher.java

@@ -12,7 +12,7 @@ import java.util.jar.JarFile;
 
 public class Launcher {
     public static final String ATTACH_ARG = "--attach";
-    public static final String VERSION = "2022.1.0";
+    public static final String VERSION = "2022.2.0";
     public static final int VERSION_NUMBER = 202201000;
 
     private static boolean loaded = false;