cc150,1.4

package replaceSpace;

public class replaceSpace {
	public static void main(String[] args){
		String s="My dog is maotou";
		String t=add(s);
		
		System.out.println(s);
		System.out.println(t);
		}
	
	public static String add(String s){
		int spacecount=0;
      
		for (int i = 0; i < s.length(); i++){
			if(s.charAt(i)==' ')
				spacecount++;
			}
		char[] replace=new char[s.length()+spacecount*2];
		int j=0;
		for(int i=0;i<s.length();i++){
			if (s.charAt(i)==' '){
				replace[j]='%';
				replace[j+1]='2';
				replace[j+2]='0';
				j+=2;
			}
			else
				replace[j]=s.charAt(i);
			j++;
		}
		
	String replaces=new String(replace);
	return replaces;

	}

	
	}