java:java-exception-cause

(java:java-exception-cause condition)

Answers the exception a java:java-exception carries: the java.lang.Throwable a java: member threw. A java:java-exception is the condition such a member signals, a simple-error whose report names the member and the exception; anything else is a type-error. Part of the JVM-only java interop package -- available on the interpreter and in JVM-compiled classes, not on the WASM backend. See the Java interop guide.

Integer.parseInt throws a NumberFormatException; the handler reads its class off the exception the condition carries.

An exception that a loaded Clojure file calling Java throws is a java:java-exception too. Its cause is a host exception of the exception's class, built once from its message and cause (an ex-info's is a RuntimeException).