Question

private static synchronized String[][] map2data(Map<String, Object> map) {
    if (map != null) {
        String[][] msg_data = (String[][]) map.get("message_data");
        return msg_data;
    } else {
        return null;
    }
}

My java code of my android project is as below. When I debug it in eclipse, after String[][] msg_data = (String[][]) map.get("message_data"); executed, it goes to return null; in the else case.

I’m totally confused about this. Firstly I guess there’s something wrong in the String[][] msg_data = (String[][]) map.get("message_data");, but when I change it toString a = "a", it is still the same. Why?
May it because “static synchronized “or something else?

Answer 1

Looking from your code it never be happen..

Check your msg_data in if statement may be its null. And if you debug it correctly may be your code be out of sync. So build once again..

EDIT:

Remove else part from it, use this code,

CODE:

private static synchronized String[][] map2data(Map<String, Object> map) {
String[][] msg_data = null;
    if (map != null) {
        msg_data = (String[][]) map.get("message_data");
       } 
return msg_data;
}