============================= III JJJ A V V A
I J A A V V A A
I J AAAAA V V AAAAA I J J A A V V A A III JJ A A V A A

      by Daniel G Lubarov
       daniel@lubarov.com

This REPL evaluates Java expressions interactively. To compile, just do javac ijava.java

=========================================== EEEEE X X A M M PPPP L EEEEE E X X A A MM MM P P L E
EEEE X AAAAA M M M PPPP L EEEE E X X A A M M P L E
EEEEE X X A A M M P LLLLL EEEEE

+-----------------------------------------+ | C:\Users\daniel>ijava | | >>> 2 + 3 | | 5 | | >>> Math.cos(Math.PI) | | -1.0 | | >>> Integer.MIN_VALUE * -1 // underflow | | -2147483648 | | >>> new Integer(42).hashCode() | | 42 | | >>> System.getProperty("java.vm.name") | | Java HotSpot(TM) Client VM | +-----------------------------------------+

======================================================================= H H OOO W W III TTTTT W W OOO RRRR K K SSSS H H O O W W I T W W O O R R K K S
HHHHH O O W W W I T W W W O O RRRR KKK SSS
H H O O W W W I T W W W O O R R K K S H H OOO W W III T W W OOO R R K K SSSS

How does the shell work? It's a bit of a hack, to say the least! Essentially, it - reads an expression from standard input - surrounds the expression with some template code - writes the code to a temporary file - runs javac on that file - dynamically loads the class - invokes a method in the new class using reflection - prints the object returned by this method