Instead of using try and catch block can you not use default case from switch case.
```java
String execute(String command) {
String result = "";
switch(command) {
case "song":
result += " sings: Like a Rolling Stone ...";
break;
case "joke":
result += " says: Why are Communists bad Java programmers?They dont't like classes.";
break;
case "story":
result += " says: A long long time ago ...";
break;
default:
return "ERROR";
break;
}
return this.ChatBotName + result;
}
```
Just out of curiosity I've taken a look at what happens under the hood, and I've used [dtruss/strace][1] on each test.
C++
./a.out < in
Saw 6512403 lines in 8 seconds. Crunch speed: 814050
syscalls `sudo dtruss -c ./a.out < in`
CALL COUNT
__mac_syscall 1
<snip>
open 6
pread 8
mprotect 17
mmap 22
stat64 30
read_nocancel 25958
Python
./a.py < in
Read 6512402 lines in 1 seconds. LPS: 6512402
syscalls `sudo dtruss -c ./a.py < in`
CALL COUNT
__mac_syscall 1
<snip>
open 5
pread 8
mprotect 17
mmap 21
stat64 29
[1]: http://en.wikipedia.org/wiki/Strace
