o neww ww 123 분할 문자열 split

public class Test01 {  
	    public static void main(String[] args) {  
        String str = "o_neww_ww_123";  
	       String regex = "_";  
	       String[] strs = str.split(regex);  
	       for(int i = 0; i < strs.length; i++) {  
	           System.out.println(strs[i]);
	       }
	       String ss="";
	       for(int i=0;i<strs.length-1;i++){
	    	  if(i==strs.length-2)
	    		  ss+=strs[i]; 
	    	  else
	    		  ss+=strs[i]+"_"; 
	       }
	       System.out.println(ss+"::");
	    }  
}