public static void main(String args[]) { String fileName = "c://lines.txt"; List<String> list = new ArrayList<>(); try (Stream<String> stream = Files.lines(Paths.get(fileName))) { //1. filter line 3 //2. convert all content to upper case //3. convert it into a List list...
Java 8 Stream is another way (albeit cleaner) of reading a file line by line. We can use Files.lines() static method to initialize a lines stream like below: try { // initialize lines stream Stream<String> stream = Files.lines(Paths.get("examplefile.txt")); // read lines stream.for...
public static void readFileByBytes(String fileName) { File file = new File(fileName); InputStream in = null; try { System.out.println("以字节为单位读取文件内容,一次读多个字节:"); // 一次读多个字节 byte[] tempbytes = new byte[100]; int byteread = 0; in = new FileInputStream(fil...
Second, create a FileReader object and specify the file you want to read by providing the file's path as an argument. Third, use a BufferedReader to read the file line by line and store the lines in a StringBuilder to form a single string. Finally, close the FileReader and Buffered...
* How to Read a File line by line using Java 8 Stream - Files.lines() and Files.newBufferedReader() Utility APIs. */ publicclassCrunchifyJava8StreamReadFile{ publicstaticvoidmain(String[]args){ StringcrunchifyFile ="/Users/app/Download/crunchify-java8-stream.txt"; ...
//reading file content line by line Stringline = reader.readLine(); while(line!=null){ System.out.println(line); line = reader.readLine(); } }catch(FileNotFoundExceptionex){ Logger.getLogger(CollectionTest.class.getName()) .log(Level.SEVERE,null, ex); ...
readLine()是读取流读数据的时候用的，同时会以字符串形式返回这一行的数据，当读取完所有的数据时会返回null。代码示例：public static void main(String[] args) throws Exception { //获取读取流 3 FileReader reader = new FileReader("C:\\Users\\杨华彬\\Desktop\\test.txt");BufferedReader br...
将缓冲指定文件的输入。如果没有缓冲,read()或readLine()的每次调用都可能导致从文件中读取字节,转换为字符,然后返回,这可能是非常低效的。 1. 2. 3. 4. 在接着我们使用in.readLine()就可以了。它会一次读取被读取文件的每一行,并且返回这一行形成的String line= in.readLine();//读取文件中矩阵的一行 ...
PathfilePath=Paths.get("c:/temp","data.txt");List<String>lines=Files.readAllLines(filePath);for(Stringline:lines){System.out.println(line);} 4. Reading a File Line by Line usingFileReader[Legacy] Till Java 7, we could read a file usingFileReaderin various ways. This has been mentioned...
void testReadFile1() throws IOException { //文件内容：Hello World|Hello Zimug String fileName = "D:\\data\\test\\newFile4.txt";try (Scanner sc = new Scanner(new FileReader(fileName))) { while (sc.hasNextLine()) { //按行读取字符串 String line = sc.nextLine();System.out.println...