Java.io. Character Stream

//Character stream, Reader and Writer
	
	//Character output stream Writer
	//write a string to the file
	public static void main(String[] args) throws Exception {
		String path="d:"+File.separator+"T2.txt";//Find the file path
		File file = new File(path);

//		Writer fileWriter = new FileWriter(file);
		Writer fileWriter = new FileWriter(file,true);//true, append a string after it, do not overwrite the previous string
		
		// Directly output the string without first converting it to a byte array
		fileWriter.write("\r\nsuccess");
		fileWriter.close();
	}

// character input stream Reader
	public static void main(String[] args) throws Exception {
		String path = "d:" + File.separator + "T2.txt";//Find the file path
		File file = new File(path);

		Reader reader = new FileReader(file);
		
		char[] chars = new char[1000];//The read data is stored in this array
		int read_len = reader.read(chars);////The size of the file read
		
		reader.close();
		System.out.println(new String(chars, 0, read_len));
	}