1 public class Solution { 2     public String replaceSpace(StringBuffer str){ 3         String strTemp = ""; 4         for(int i = 0; i < str.length(); i++){ 5             if(str.charAt(i) == ‘ ‘){ 6                 strTemp += "%20"; 7                 continue; 8             } 9             strTemp += str.charAt(i);10         }11         12         return strTemp;13     }14     15     public static void main(String[] args) {16         Solution solutionBlank = new Solution();17         StringBuffer str = new StringBuffer("We Are Happy");18         System.out.println(solutionBlank.replaceSpace(str));19     }20 }