JDK-8217735: Q: Should jint be jboolean ?

Andrew Leonard andrew_m_leonard at uk.ibm.com
Mon Mar 4 11:30:16 UTC 2019


This bug raised a missmatch between the Java and JNI definition for a 
native method, where Java specifies "boolean" and the JNI jint. Which is 
right, should they match?
One part of the JVM spec that confuses me a bit is:
2.3.4 The boolean Type
Although the Java Virtual Machine defines a boolean type, 
it only provides very limited support for it. 
There are no Java Virtual Machine instructions solely dedicated
to operations on boolean values. Instead, expressions in the Java 
programming language that operate on boolean values are 
compiled to use values of the Java Virtual Machine int data type.


Andrew Leonard
Java Runtimes Development
IBM Hursley
IBM United Kingdom Ltd
Phone internal: 245913, external: 01962 815913
internet email: andrew_m_leonard at uk.ibm.com 

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