當我使用BufferedReader
從.txt
文件空使用的BufferedReader
BufferedReader read = new BufferedReader(
new InputStreamReader(getAssets().open(name)));
BufferedReader count = new BufferedReader(
new InputStreamReader(getAssets().open(name)));
String line;
String str = null;
while((line = count.readLine()) != null)
{
str += read.readLine() + "\n";
}
得到String
比我顯示,在String
一個TextView
但它顯示爲空,比字符串的beggining加我String
nullThis is file 1
而不是 This is file 1
我該如何解決這個問題?
? –
'str = null'後面跟着'str + = something',它在當時的意思是'str = null + something',你想知道爲什麼你的字符串中會出現'null'? – Andreas
_str + = _是錯誤的。 –