With JDK 17, it's not possible anymore to make a field accessible using reflection, at least not for java.lang
-classes. Following snippet:
final Process process = new ProcessBuilder().directory(new File("d:/temp")).command("cmd.exe").start();
final Field handleField = process.getClass().getDeclaredField("handle");
handleField.setAccessible(true);
fails with:
Exception in thread "main" java.lang.reflect.InaccessibleObjectException: Unable to make field private final long java.lang.ProcessImpl.handle accessible: module java.base does not "opens java.lang" to unnamed module @254989ff
at java.base/java.lang.reflect.AccessibleObject.checkCanSetAccessible(AccessibleObject.java:354)
at java.base/java.lang.reflect.AccessibleObject.checkCanSetAccessible(AccessibleObject.java:297)
at java.base/java.lang.reflect.Field.checkCanSetAccessible(Field.java:178)
at java.base/java.lang.reflect.Field.setAccessible(Field.java:172)
Is there a way to work around this problem?
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