java stream foreach

IO stream in java and javaIO stream Stream: java stream is a class developed by Sun for file operations and data transmission, but it is called a stream. all opened streams must be clos

OverviewIO streams are used to process data transfer between devicesHow Java operates on data by streamingThe objects that Java uses to manipulate the flow are in the IO packageStream-by-operation data is divided into: byte stream and character streamFlow is divided into: input stream and output

.JavaInputStream is the ancestor of all byte input streams, and OutputStream is the ancestor of all byte output streams.Character Stream of 2.JavaReader is the ancestor of all read string input streams, while writer is the ancestor of all output strings.Inputstream,outputstream,reader,writer are abstract classes. So you can't just newByte stream is the most basic, all inputstream and OutputStream subclasses

character stream to wrap the character stream, the surface is a stream of characters, in fact, the bottom is the byte stream (standard output stream)7 //OutputStreamWriter OSW = new OutputStreamWriter (OS);8 //bufferedwriter bw = new Buffered

The IO stream of Java is divided into character stream (Reader,writer) and Byte stream (Inputstream,outputstream), and the byte stream is the name stream that reads the contents of the file into the array of bytes and then outputs

=NewOutputStreamWriter (FileOutputStream); //building character output stream objectsBufferedWriter BufferedWriter =NewBufferedWriter (OutputStreamWriter); //Building Data Char[] chars =New Char[3]; chars[0] = ' a '; chars[1] = ' B '; chars[2] = ' Medium '; //Output DataBufferedwriter.write (chars); //Close the streamBufferedwriter.close (); Outputstreamwriter.close (); Fileoutputstream.close (); } Catch(FileNotFoundExcep

Foreach statements Use Summary foreach statements are one of the new features of Java 5. In terms of traversing arrays and collections, foreach provides great convenience for developers. The foreach statement is a special simplified version of the for statement, but the

1. What is a streamThe stream in Java is an abstraction of a sequence of bytes, and we can imagine a water pipe, except that it is no longer the water that flows in the pipe, but the sequence of bytes. Like currents, streams in Java also have a "flow direction," where an object that is typically read into a sequence of bytes is called an input

1. What is a streamThe stream in Java is an abstraction of a sequence of bytes, and we can imagine a water pipe, except that it is no longer the water that flows in the pipe, but the sequence of bytes. Like currents, streams in Java also have a "flow direction," where an object that is typically read into a sequence of bytes is called an input

"); SYSTEM.OUT.PRINTLN (name);//output: JavaString filename= Filenameutils.getname ("D:\\b.java"); SYSTEM.OUT.PRINTLN (filename);//Output: B.java BooleanA = Filenameutils.isextension ("C.java", "Java"); System.out.println (a);//output True to determine the file suffix method } Public Static voidFunction2 ()throwsioexception{//read the contents of a text fileString S1 = fileutils.readfiletostring (NewFile ("D:\\1.txt"));

Summary of Use of foreach statementThe foreach statement is one of the new features of Java5, and foreach provides a great convenience for developers in traversing arrays and collections. The foreach statement is a special, simplified version of the for statement, but the foreach