Java read-write binary file operations

/** *  binary read/write file  */import java.io.BufferedInputStream;import  Java.io.bufferedoutputstream;import java.io.datainputstream;import java.io.dataoutputstream;import  java.io.fileinputstream;import java.io.fileoutputstream;public class mainclass{/** * The OutputStream and its subclasses in the  java.io package are dedicated to writing binary data.  * fileoutputstream is its subclass, which can be used to write binary data to a file.  * dataoutputstream is another subclass of OutputStream, which can be  *  connected to a fileoutputstream for easy writing of data of various basic data types.  */public void writemethod1 () {string filename= "C:/kuka1.dat";int value0=255;int  value1=0;int value2=-1;try{//Connect DataOutputStream with FileOutputStream to output different types of data// The constructor of the FileOutputStream class is responsible for opening the file Kuka.dat, if the file does not exist,//creates a new file and replaces it with the newly created file if it already exists. Then the object of the fileoutputstream//class is connected to a DataOutputStream object, and the DataOutputStream class has methods for writing//various data types. Dataoutputstream out=new dataoutputstream (New fileoutputstream (FileName)); Out.writeInt (VALUE0) ; Out.writeint (value1); Out.writeint (value2); out.clOSE ();}  catch  (exception e) {e.printstacktrace ();}} For writing large amounts of data, using the buffered stream Bufferedoutputstream class can improve efficiency public void writemethod2 () {string filename= "c:/ Kuka2.txt "; Try{dataoutputstream out=new dataoutputstream ( new bufferedoutputstream (  New fileoutputstream (FileName)); Out.writeint (10); System.out.println (out.size () + " bytes have been written."); O Ut.writedouble (31.2); System.out.println (out.size () + " bytes have been written."); O Ut.writebytes ("JAVA"); System.out.println (out.size () + " bytes have been written."); O Ut.close ();}  catch  (exception e) {e.printstacktrace ();}} /** *  common classes for binary files are fileinputstream,datainputstream * bufferedinputstream and so on. Similar to dataoutputstream,datainputstream *  also provides a number of methods for reading Boolean, Byte, character, shape, long, short,  *  single-precision, double-precision and other data.  */public void readmethod1 () {string filename= "C:/kuka1.dat"; int sum=0;try{ DatainputstreaM in=new datainputstream (   new bufferedinputstream (   new  FileInputStream (FileName)); Sum+=in.readint (); Sum+=in.readint (); Sum+=in.readint (); System.out.println ("The sum is:" +sum); In.close ();}  catch  (exception e) {e.printstacktrace ();}} Public void readmethod2 () {Try{fileinputstream stream=new fileinputstream ("C:/kuka.dat"); Int c;while ((C=stream.read ())!=-1) {System.out.println (c);}}  catch  (exception e) {e.printstacktrace ();}}}

Java read and write binary file operations