为什么String Array不将字符串作为第一个索引

Question

I have the following code. There is problem in String[] sep2=strAdder; compiler suggests that change the sep2 to String or change the type of strAdder to String[]. I am confused about that. I think it should work

String strAdder = null;

while ((strLine = br.readLine()) != null )   {
    if (strLine.contains(">>")) {
        String[] sep1 = strLine.split(">>");
        String[] sep2 = strAdder;
        dd = null;
    }
    if (!(strLine.contains(">>"))) {
        strAdder.concat(strLine.toString());
    }
    i++;
}
in.close();

Answer 1

I don't understand what you are trying to do. strAdder is of type String , which means you can't assign it to String[] . Given that I don't know what you plan to do with sep2 then you could do String sep2 = strAdder or String[] sep2 = new String[]{strAdder}

Answer 2

What is the i++ doing? Apart from that , your second if statement is nothing but the "else" of the previous if.Why have another if for that? strLine is already a String why convert to string.And finally if you want to store just store "String sep2= strAdder;"