How do i crack JNI (Java native interface)

[RandomNPC]

Theres a repo on github that converts java methods to a native method:

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I made a simple crack me that checks if a string contains something specific:

String string = "Testing";
if(string.contains("lol")) {
JOptionPane.showMessageDialog(null, "cracked");
}else {
JOptionPane.showMessageDialog(null, "Not cracked");
}

I then converted it to native using that repo heres the jar

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the native dll is in the native0 package, how would i go about cracking this? i opened it in IDA and no luck getting it passed.

this is the result i would want in native not just simple change the "Testing" string to "lol"

String string = "Testing";
if(!string.contains("lol")) {
JOptionPane.showMessageDialog(null, "cracked");
}else {
JOptionPane.showMessageDialog(null, "Not cracked");
}