Bugzilla – Full Text Bug Listing
| Summary: | ClassCastException: java.lang.String cannot be cast to javax.xml.namespace.QName | ||||||
|---|---|---|---|---|---|---|---|
| Product: | [Eclipse Project] JDT | Reporter: | Kirill Golovin <golovin> | ||||
| Component: | Core | Assignee: | Stephan Herrmann <stephan.herrmann> | ||||
| Status: | CLOSED NOT_ECLIPSE | QA Contact: | |||||
| Severity: | normal | ||||||
| Priority: | P3 | CC: | stephan.herrmann | ||||
| Version: | 4.7.2 | ||||||
| Target Milestone: | 4.8 M6 | ||||||
| Hardware: | PC | ||||||
| OS: | Windows 7 | ||||||
| Whiteboard: | |||||||
| Attachments: |
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By minimal extension your program will throw CCE even when compiled with javac.
Simply add after your for-loop:
//---
for (QName n : ports.keySet()) {
System.out.println(n.getPrefix());
}
//---
That program is broken, and javac just happens to generate bytecode that triggers the CCE later.
You are creating & filling a map with Entry<String,String>.
By use of the rawtype Map and a subsequent uncheck cast (two warnings) you force the compiler into accepting an erroneous program.
Any real use of the coerced Map will inevitable throw CCE.
Deferring the CCE to the point of usage is a bad idea when you have to debug such program, as it can be arbitrarily hard, to find the location that corrupted the Map.
Ecj works as designed.
Thank you for the explanation. I know that the code contains incorrect casts. But I was wrong in thinking that the code is working correctly. |
Created attachment 272571 [details] Test java sorce I have problem with debug my application in Eclipse. I have java.lang.ClassCastException: java.lang.String cannot be cast to javax.xml.namespace.QName. But, my application compilled with Sun JDK 1.7.0_80 dont have this problem. This application has been working for many customers for many years. I make simple example Main.java When executing it in the Eclipse, an error occurs: Exception in thread "main" java.lang.ClassCastException: java.lang.String cannot be cast to javax.xml.namespace.QName at Main.main(Main.java:15) If i make compile Main.java with javac 1.7.0_80 then no have execution errors. Of course, I already created a custom ant task for building an application with sun javac. But this is a very inconvenient way of building.