BufferedReader is a wrapper for both “InputStreamReader/FileReader”, which buffers the information each time a native I/O is called. You can imagine the efficiency difference with reading a character(or bytes) vis-a-vis reading a large no. of characters in one go(or bytes). With BufferedReader, if you wish to read single character, it will store the contents to … Read more
In $JRE/lib/security/java.security: jdk.tls.disabledAlgorithms=SSLv3, TLSv1, RC4, DES, MD5withRSA, DH keySize < 1024, \ EC keySize < 224, 3DES_EDE_CBC, anon, NULL This line is enabled, after I commented out this line, everything is working fine. Apparently after/in jre1.8.0_181 this line is enabled. My Java version is “1.8.0_201.
First, You should understand “streaming” in Java because all “Readers” in Java are built upon this concept. File Streaming File streaming is carried out by the FileInputStream object in Java. // it reads a byte at a time and stores into the ‘byt’ variable int byt; while((byt = fileInputStream.read()) != -1) { fileOutputStream.write(byt); } This … Read more
Java has two kinds of classes for input and output (I/O): streams and readers/writers. Streams (InputStream, OutputStream and everything that extends these) are for reading and writing binary data from files, the network, or whatever other device. Readers and writers are for reading and writing text (characters). They are a layer on top of streams, … Read more
PrintWriter gives more methods (println), but the most important (and worrying) difference to be aware of is that it swallows exceptions. You can call checkError later on to see whether any errors have occurred, but typically you’d use PrintWriter for things like writing to the console – or in “quick ‘n dirty” apps where you … Read more
The problem in your code is that it’s creating lots of heavy String objects, copying their contents and performing operations on them. Instead, you should use StringBuilder to avoid creating new String objects on each append and to avoid copying the char arrays. The implementation for your case would be something like this: BufferedReader r … Read more
BufferedReader can’t wrap an InputStream directly. It wraps another Reader. In this case you’d want to do something like: BufferedReader br = new BufferedReader(new InputStreamReader(is, “UTF-8”));
no. BufferedReader.close() closes the stream according to javadoc for BufferedReader and InputStreamReader as well as FileReader.close() does.
Scanner is used for parsing tokens from the contents of the stream while BufferedReader just reads the stream and does not do any special parsing. In fact you can pass a BufferedReader to a scanner as the source of characters to parse.