Java笔记整理

1.txt文件读入

		File f = new File("C:\\Users\\dell\\Desktop\\ELF\\hello.txt");
		InputStreamReader reader = new InputStreamReader(new FileInputStream(f));
		BufferedReader br = new BufferedReader(reader);
		String line;
		while((line = br.readLine()) != null) {
			System.out.println(line);
		}
		reader.close();

2.txt文件写入

		File f = new File("C:\\Users\\dell\\Desktop\\ELF\\writeMe.txt");
		f.createNewFile();
		BufferedWriter bw = new BufferedWriter(new FileWriter(f));
		bw.write("I am inside\r\nhehe\r\n嘿嘿");    //\r\n为换行
		bw.flush();
		bw.close();