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String s1 = "Why so serious!";
		String s2="Hello World!☻☺♦";
		PrintStream ps = new PrintStream("test.txt");
		ps.println(s1);
		ps.println(s2);
		ps.write(s2.getBytes());
////
FileWriter fw = new FileWriter(test);
		fw.write("one more");
		fw.write("2222");
		fw.flush(); //important
////
FileReader reader = new FileReader(test);
		int c;
		while((c=reader.read())!=-1){
			
			System.out.print((char)c);
		}
		

FileInputStream fis = new FileInputStream("abc.txt");
		byte[] bt = new byte[fis.available()];
		fis.read(bt);
		System.out.println(new String(bt));
///
   try(FileOutputStream fos=new FileOutputStream("C://SomeDir//notes.txt"))
        {
            // перевод строки в байты
            byte[] buffer = text.getBytes();
             
            fos.write(buffer, 0, buffer.length);
        }
///
File test = new File("test.txt");
		if (!test.exists()) {
			test.createNewFile();
		}
 
     

url = new URL("http://google.com");
			urlcon = url.openConnection();
			instream = new InputStreamReader(urlcon.getInputStream(), "UTF8");
			buff = new BufferedReader(instream);
			while (true) {
				nextLine = buff.readLine();
				if (nextLine != null) {
					System.out.println(nextLine);
				} else break;
			}

Path ff = FileSystems.getDefault().getPath(".", "abc.txt");
	try {
	 List ll =Files.readAllLines(ff);
		System.out.println(Arrays.toString(ll.toArray()));
	} catch (IOException e) {
		e.printStackTrace();
	}

	File fl = new File("response.json");
		File renamedfile = new File("response2.json");
		File fl3 = new File("here/test");
		File dir2 = new File("response");
		System.out.println(fl.exists());
		System.out.println(fl.length());
		System.out.println(dir2.isDirectory()+" its directory");
		
		String[]  dirs = dir2.list();
		System.out.println(Arrays.toString(dirs));
		
//		fl.delete();
//		fl.renameTo(renamedfile);
		
 		fl3.mkdirs(); //make folders here/test
		System.out.println(fl.getCanonicalPath());
	
		Path pt =  Paths.get("response.json");
		System.out.println(Files.isWritable(pt));

FileOutputStream  myFile = null;
		  byte[] test = "testing output".getBytes(Charset.forName("UTF-8"));
		
		try {
			myFile = new FileOutputStream("abcOut.txt");
			myFile.write(test);
			
		} catch (IOException e) {
			e.printStackTrace();
		} finally {
			if (myFile!=null) try {
				myFile.close();
			} catch (IOException e) {
				e.printStackTrace();
			}
		}
		

FileInputStream  myFile = null;
		try {
			myFile = new FileInputStream("abc.txt");
			boolean eof = false;
			while (!eof) {
				int byteVal = myFile.read();
				System.out.println(byteVal+" ");
				if (byteVal==-1) eof=true;
			}
			
		} catch (IOException e) {
			e.printStackTrace();
		} finally {
			if (myFile!=null) try {
				myFile.close();
			} catch (IOException e) {
				e.printStackTrace();
			}
		}