Slight difference here. There are actually two types of errors in the Java code:
1. int foo = (int) Math.random() * some_max_value;
The error here is assuming that the multiplication takes place before the truncation. This isn't happening in the Python code because int(expression to truncate) is unambiguous. (+1 to Python here for making it hard to shoot yourself in the foot).
2. int foo = (int) Math.random();
The error here is assuming that Math.random returns something outside [0.0, 1.0). This is the error that all five of the Python examples are showing. (Boo to Python AND Java programmers.)
1. int foo = (int) Math.random() * some_max_value;
The error here is assuming that the multiplication takes place before the truncation. This isn't happening in the Python code because int(expression to truncate) is unambiguous. (+1 to Python here for making it hard to shoot yourself in the foot).
2. int foo = (int) Math.random();
The error here is assuming that Math.random returns something outside [0.0, 1.0). This is the error that all five of the Python examples are showing. (Boo to Python AND Java programmers.)