剑指 Offer 05. 替换空格

package leetcode;

public class offer_05 {
    
    public String replaceSpace(String s) {
        StringBuilder sb=new StringBuilder();
        for(int i=0;i<s.length();i++) {
            if(s.charAt(i)==' ') {
                sb.append("%20");
            }else {
                sb.append(s.charAt(i));
            }
        }
        String str=sb.toString();
        System.out.println(str);
        return str;
    }
    
    
    public static void main(String[] args) {
        // TODO Auto-generated method stub
        offer_05 off=new offer_05();
        off.replaceSpace("We are happy.");
    }

}