bufferedreader

I am currently trying to read a String from a BufferedReader but cant find a way to do this... Of course I tried BufferedReader inStream = null; inStream = new BufferedReader(new InputStreamReader(client.getInputStream())); String test = inStream.readLine(); However the result turns out as null when trying to print to a screen even though the BufferedReader inStream is equal to some kind of message. Based on the documentation , the BufferedReader.readLine() returns null only when the end of the stream is reached. This means if the first call to readLine() returns null , there was nothing in

I have 100 millions of records in JSON file, need an efficient and fastest method to read the array of arrays from a JSON file in java . JSON file look like: [["XYZ",...,"ABC"],["XYZ",...,"ABC"],["XYZ",...,"ABC"],...,["XYZ",...,"ABC"], ["XYZ",...,"ABC"],["XYZ",...,"ABC"],["XYZ",...,"ABC"],...,["XYZ",...,"ABC"], ... ... ... ,["XYZ",...,"ABC"],["XYZ",...,"ABC"],["XYZ",...,"ABC"]] I want to read this JSON file line by line as: read first: ["XYZ",...,"ABC"] then: ["XYZ",...,"ABC"] so on:' ... ... ... ["XYZ",...,"ABC"] How do I read a JSON file like this, I know it does not completely look like a

I've written the following code: public class WriteToCharBuffer { public static void main(String[] args) { String text = "This is the data to write in buffer!\nThis is the second line\nThis is the third line"; OutputStream buffer = writeToCharBuffer(text); readFromCharBuffer(buffer); } public static OutputStream writeToCharBuffer(String dataToWrite){ ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream(); BufferedWriter bufferedWriter = new BufferedWriter(new OutputStreamWriter(byteArrayOutputStream)); try { bufferedWriter.write(dataToWrite); bufferedWriter.flush(); } catch

I have two threads in Java. First thread is closing a bufferedreader ( br.close() ) When the second thread does a read on the same reader I get an IOException (Stream Closed) I get this exception even if I use br.ready() Is there a way to know if the stream is already closed? The method ready() will throw an exception if closed. But even if you added a closed check method, so long as the lock is released between calls (which it is for BufferedReader ), the reader might be closed by the time you read it. I see three options: Wrap your read call with a try/catch block to handle the closed case.