import java.util.ArrayList;
import java.util.List;

/**
 * 
 * @author cstur4
 *
 */
public class CSDN {

    public static void main(String[] args) {
        
        String mode = "111100111111100011111011";
        List<String> res = conversionMode(mode);
        for(String s:res)
            System.out.println(s);
        
    }
    public static List<String> conversionMode(String mode){
        List<String> res = new ArrayList<String>();
        int index = 0;
        while(index<mode.length()){
            if(mode.charAt(index)=='1'){
                int end = getRightIndex(mode, index);
                String newMode = fillWith0(index)+"-"+fillWith0(end);
                res.add(newMode);
                index = end+1;
            }else
                index++;
        }
        return res;
    }

    private static int getRightIndex(String mode, int index) {
        
        while(index<mode.length() && mode.charAt(index)=='1')
            ++index;
        return index-1;
    }
    
    private static String fillWith0(int num){
        
        String value = String.valueOf(num);
        if(value.length()==1)
            return "0"+num;
        return value;
    }
    
    

}

------解决方案--------------------
Java code

public static void main(String args[]) {
        List<String> list = new ArrayList<String>();
        String mode = "111100111111100011111011";
        char[] data = mode.toCharArray();
        int startIndex = -1;
        int endIndex = -1;
        for (int i = 0; i < data.length; i++) {
            if (data[i] == '1') {
                if (startIndex == -1) {
                    if(i == data.length - 1){
                        String tempStart = ("00"+i).replaceAll(".*?(\\d{2})$", "$1");
                        String tempEnd = ("00"+i).replaceAll(".*?(\\d{2})$", "$1");
                        list.add(tempStart + "-" + tempEnd);
                        startIndex = -1;
                        endIndex = -1;
                    }
                    else{
                        startIndex = i;
                        endIndex = i;
                    }
                } else {
                    if(i == data.length - 1){
                        String tempStart = ("00"+startIndex).replaceAll(".*?(\\d{2})$", "$1");
                        String tempEnd = ("00"+i).replaceAll(".*?(\\d{2})$", "$1");
                        list.add(tempStart + "-" + tempEnd);
                        startIndex = -1;
                        endIndex = -1;
                    }
                    else{
                        endIndex = i;
                    }
                    
                }
            }
            if (data[i] == '0') {
                if (startIndex != -1) {
                    String tempStart = ("00"+startIndex).replaceAll(".*?(\\d{2})$", "$1");
                    String tempEnd = ("00"+endIndex).replaceAll(".*?(\\d{2})$", "$1");
                    list.add(tempStart + "-" + tempEnd);
                    startIndex = -1;
                    endIndex = -1;
                }
            }
        }
        System.out.println(list);
    }