acrobat reader and writer

:" + file.separator + "Yi.txt");//specify the files to be read outReader Read =NULL;//defining character input streams Try{Read=Newfilereader (file); } Catch(IOException e) {e.printstacktrace (); } Char[] b=New Char[1024];//set the length of a character Try { intlen=Read.read (b); System.out.println (NewString (b)); } Catch(IOException e) {e.printstacktrace (); } Try{read.close (); } Catch(IOException e) {e.printstacktrace (); } } } View C

(doubled)publicvoidprint(char[]text)publicvoidprint(Strings)publicvoidprint(Objecto)publicvoidprintln()publicvoidprintln(booleanb)publicvoidprintln(charc)publicvoidprintln(inti)publicvoidprintln(longl)publicvoidprintln(floatf)publicvoidprintln(doubled)publicvoidprintln(char[]text)publicvoidprintln(Strings)publicvoidprintln(Objecto) Most of the actions of these methods are the same as those in printstream. There are only four write () methods with exceptions. They write characters instead o

Check the BufferedReader JDK documentation:Reads text from a character-input stream, buffering characters so as to provide for theefficient reading of Chara Cters, arrays, and lines.Should be more efficient, why is it high efficiency?Look, it should be. Caching can reduce IO read and write times , and IO port operations are inefficient, so doing so can improve efficiency.Copyright NOTICE: This article for Bo Master original article, without Bo Master permission not reproduced.Why use Bufferedrea

Question 1: readers Level 1: Only readers are allowed. A maximum of K readers are allowed to write programs using P and V Operations. int main(){ int rspace = k; cobegin read_1(); read_2(); …… read_n(); coend}read_i(){ p(rspace); …… v(rspace);} In this operation, you need to set the signal rspace to determine whether the number of people has reached K. When the number of people reaches K, rspace = 0. In this case, you need to suspend. Level 2: One

three:outputstreamwriter and inputstreamreader Public classMyCode1 { Public Static voidMain (string[] args)throwsIOException {File f=NewFile ("My.txt"); OutputStream OS=NewFileOutputStream (f); OutputStreamWriter OSW=Newoutputstreamwriter (OS); Osw.write ("HELLO"); Osw.close (); Os.close (); InputStream is=NewFileInputStream (f); InputStreamReader ISR=NewInputStreamReader (IS); System.out.println ((Char) Isr.read ()); Isr.close (); Is.