java code

package om.cmd.usr.define;

import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class TestCmd {
    public static void main(String[] args){
        String cmd = "om wait 10s";
        if ( cmd.matches( "om .*")) {
            if ( cmd.matches( "om wait .*")) {
                Pattern p=Pattern. compile("(?<=om wait )([0-9]*)(?=s)");
                Matcher m= p.matcher( cmd);
                while( m.find()){
                    // result : 10
                    System. out.println( "result: " + m.group());
                }
                System. out.println( "over");
            }
        }
    }
}
# end

c code

#include <stdio.sh>

void main(char * args){
    printf("hello world : %s","zhouzhiping");
}
// end

bash code

#!/bin/bash
for line in `ls`
do
    echo "$line"
done

python code

import os

Class Test():
    def __init__(self):
        pass

    def test(self):
        print "hello world"

结束!