哪位兄弟能帮我把这段perl代码给我改成java的
srand (time());
my $randletter = "(int (rand (26)) + (int (rand (1) + .5) % 2 ? 65 : 97))";
my $salt = sprintf ("%c%c", eval $randletter, eval $randletter);
my $plaintext = shift; my $crypttext = crypt ($plaintext, $salt);
print "${crypttext} ";