The Worst Possible C++ in Java Integration
Description
This meme uses the three-panel 'Captain America in an Elevator' format to tell a classic programmer dad joke. In the first panel, Captain America, looking serious, states, 'I use c++ in java'. In the second panel, a skeptical character (Jasper Sitwell) demands, 'Show me,' which is followed by a small inset showing a snippet of Java code: a for loop that reads 'for (int c = 0; c < 10; c++) { System.out.println(c++); }'. The final panel shows Captain America being choked and attacked by everyone else in the elevator. The humor is a play on words: the expectation is a complex integration using the Java Native Interface (JNI) to run C++ code, but the reality is a literal, syntactical 'c++' (the variable 'c' being incremented) inside a Java for loop. The violent reaction is an exaggeration of the groan-worthy nature of the pun, a relatable feeling for any senior developer who has endured enough terrible tech jokes
Comments
11Comment deleted
He's lucky they didn't ask to see his JNI bindings; that would have been a real horror scene
Told the architects I’d “integrated C++ into our Java service”; once they saw println(c++), the JNI talk ended and we spent the rest of the meeting tracing why every second invoice vanished
After 20 years of explaining that '++' is just an operator inherited from C, not an embedded C++ compiler, I've started telling juniors that Java's real superpower is supporting C#'s null-coalescing operator through creative use of NPEs
The real crime isn't using C++ syntax in Java - it's that `System.out.println(c++)` will print the value *before* incrementing, making the loop output 0-9 instead of 1-10, which means this developer doesn't fully understand either language's post-increment semantics. Senior engineers know the most dangerous code isn't the syntax error that fails at compile time, but the semantically valid abomination that passes code review and ships to production
“I use C++ in Java” - for(int c=0;c<10;c++) println(c++); The only optimization that halves your logs and doubles your code review comments
Using c++ in both println and the loop update is the fastest way to get even numbers - and odd comments - on your PR
JNI without the native crash: just increment a string literal and call it polyglot mastery
Double Increment. So 5 lines printed Comment deleted
Wow Comment deleted
I call the Police Comment deleted
Madman Comment deleted