Problem of Runtime.getRuntime().exec in UNIX

[amaywy]

I use it in Unix
No error...and no result...

Runtime.getRuntime().exec("A/HRts -I RAIN_hypo1.m > test");

HRts is my own program before,and test is output

there is no test file appear in the directory

and there is no error report either...

faint la...

>_<

Runtime.getRuntime().exec("java RAIN_hypo1 1.out 2.out");
is ok and have correct result