JAVA (basic grammar)

Verbatim https://www.dazhuanlan.com/2019/08/25/5d622b7041013/

Stick

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;

public  class   {

    public static void main(String[] args) {
        try {
      
           File a =new File("D:/file1.txt");
           File b= new File("D:/file3.txt");
           FileInputStream c = new FileInputStream(a);
           FileOutputStream d = new FileOutputStream(b);
           int e;
           while((e= c.read())!= -1 ){
               d.write(e);
           }
           c.close();
           d.close();
        }catch(FileNotFoundException e) {
            System.out.println("FileStreamsTest:" + e);
        }catch(IOException e){
            System.err.println("FileStreamTest:" + e);
        }
    }
}

Writing document data in a byte stream of

try{
    File f = new File("C:\Users\Administrator\Desktop\1.txt");
    FileOutputStream f1 = new FileOutputStream(f);
    byte [] a ={};
    f1.write(a);
    f1.close();
}
catch(IOException e){
    e.printStackTrace();
}

First create a document object, and destinations. Then create objects out of a document, the two linked, then speak

Create and delete documents

File f1 = new File("D:\1.txt");
File f2 = new File("D:\","2.txt");
File f3 = new File("D:\",File.separator+"1.txt");
f2.createNewFile();
f3.delete();

copy and paste

the try { 
        File f1 = new new File ( "D: \ 3.txt" ); 
        File F2 = new new File ( "5.txt" ); 
        FileInputStream in = new new FileInputStream (f1); // create an input stream, from a disk write memory
         a FileOutputStream OUT = new new a FileOutputStream (F2); // create an output stream, from a disk memory write int C; the while (! (C = in.read ()) = - . 1 ) {             out.write (C);         }         in.close ();         the out.close (); } the catch (IOException E) {     e.printStackTrace (); }

Read character information

try{
     FileReader file = new FileReader("D:\3.txt");
     int data = 0;
     while((data= file.read())!=-1){
         System.out.print((char)data);
     }
     file.close();
 }catch(IOException e){
     e.printStackTrace(); 
 }

Delete Document

Files.delete(Paths.get("D:\4.txt"));

View Document Information

File a=new File("D:\4.txt");
System.out.println(a.getName());
System.out.println(a.getParentFile());
System.out.println(a.getPath());

JAVA (basic grammar)

Stick

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