java 8 stream reduce

Byte Stream and character streamByte stream can handle all types of data (pictures, videos, etc.), the corresponding class in Java is "stream" End 1 bytes = 8 bits binary = The specific storage space character stream can only hand

value of public static void main (String [] args) in a linked List {List K = new ArrayList (); K. add (1); k. add (2); k. add (3); k. add (8); k. add (11); k. add (20); k. add (50); Optional Max = k. parallelStream (). max (a, B)-> {return a-B;}); System. out. println (max );} It's easy. Change k. stream () to k. parallelStream () This is simp

The byte stream processing unit is two bytes of Unicode characters, operating characters, character arrays or strings respectively, while the byte stream processing unit is one byte, operating byte and byte array. Therefore, the compaction stream is a character that is converted from a Java virtual machine to a Unicode

the efficiency of the read data. The Bufferedinputstream class first reads a batch of data into the buffer, and then the read () method only needs to get the data from the buffer to reduce the number of physical read data. Bufferedinputstream (InputStream in)--parameter in specifies the input stream that needs to be filtered. Bufferedinputstream (inputstream in, int size)--parameter in specifi

Java IO stream copying image and javaio Stream Image (1) Copying images using byte streams 1 // byte stream method 2 public static void copyFile () throws IOException {3 4 // 1. obtain the target Path 5 // (1) using the String 6 // String srcPath = "C: \ Users \ bigerf \ Desktop \ note \ 11.jpg "; 7 // String destPath

1. Demand: e:\\ brother has a wife. mp4 copied to Copy.mp4 in the current project directorybyte stream Four ways of copying files :• Basic byte stream read and write one bytes at a time• Basic byte stream reads and writes a single array of bytes at a time• High-efficiency byte stream read and write one bytes at a time•

.*; Public class CP {Public static void main(string[] args) throws IOException{File src =NewFile ("D:/myjava/a.txt"); File dest =NewFile ("D:/myjava/a_bak.txt"); CP (Src,dest); }Public static void cp(File src,file dest) throws IOException{BufferedReader BUFR =NewBufferedReader (NewFileReader (SRC)); BufferedWriter BUFW =NewBufferedWriter (NewOutputStreamWriter (NewFileOutputStream (dest),"Utf-8"));//Read by lineString line =NULL; while((Line=b

Java core programming-byte stream of IO stream (2), javaio 1. byte stream A 1.1-byte stream is a stream that operates byte. Byte streams can operate on any data, such as media data, music, movies, and images. Of course, they can a

PackageCom.machuang.convertStream;ImportJava.io.BufferedReader;ImportJava.io.File;ImportJava.io.FileInputStream;Importjava.io.IOException;ImportJava.io.InputStreamReader; Public classDemo01 { Public Static voidMain (string[] args)throwsIOException {BufferedReader reader=NewBufferedReader (NewInputStreamReader (NewFileInputStream (//A.txt saving characters in Utf-8 encoding setNewFile ("F:/win10/test/a.txt")), "UTF-

Original link: http://www.concretepage.com/java/jdk-8/java-8-stream-sorted-exampleForeign to Java8 a series of summary of Good, translation come to shareThis article will explain the Java 8