Bug Report for string-encode-and-decode

[S556370]

Bug Report for https://neetcode.io/problems/string-encode-and-decode

Please describe the bug below and include any steps to reproduce the bug or screenshots if possible.

Instead of having encoded value in decode(), getting it's reference.

class Solution {

public String encode(List<String> strs) {
    StringBuilder sb = new StringBuilder();
    for(String s: strs){
        String len = String.format("%04d",s.length());
        sb.append(len).append(s);
    }  
    System.out.println(sb.toString());      
    return sb.toString();
}

public List<String> decode(String str) {
    List<String> strs = new ArrayList<>();        
    System.out.println(x);
    return strs;
}

}

sout in encode: 0004neet0004code0004love0003you
sout in decode: [Ljava.lang.String;@2d98a335