我们将实现一个方法来读取文件夹的内容,并在控制台上输出文件和文件夹的名称。 publicvoidreadFolderContents(StringfolderPath){Filefolder=newFile(folderPath);if(folder.isDirectory()){File[]files=folder.listFiles();for(Filefile:files){if(file.isDirectory()){System.out.println("Folder: "+file.getName...
In the previous chapter, you learned how to create and write to a file.In the following example, we use the Scanner class to read the contents of the text file we created in the previous chapter:ExampleGet your own Java Server import java.io.File; // Import the File class import java...
privatestaticvoidm2(){try(FileReader fr =newFileReader("/Users/xxx/Downloads/test/xyz.txt"); ){char[] contents =newchar[1024];intlen = fr.read(contents);while(len !=-1){//把读到的字符进行处理,转换为字符串打印System.out.println(newString(contents,0,len)); len=fr.read(contents); }...
Java Code: importjava.io.FileInputStream;importjava.io.FileNotFoundException;importjava.io.IOException;importjava.io.InputStream;// Reading contents from a file into byte array.publicclassExercise10{publicstaticvoidmain(Stringa[]){Stringfile_name="/home/students/test.txt";InputStreamfins=null;try{...
In this tutorial we’ll explore different ways to read from a File in Java; we’ll make use ofBufferedReader, Scanner, StreamTokenizer, DataInputStream, SequenceInputStream andFileChannel. Then, we will discuss how to read a UTF-8 encoded file and how to create String from contents of a ...
publicclassReadFileLineByLineUsingBufferedReader{publicstaticvoidmain(String[]args){BufferedReaderreader;try{reader=newBufferedReader(newFileReader("sample.txt"));Stringline=reader.readLine();while(line!=null){System.out.println(line);// read next lineline=reader.readLine();}reader.close();}catch(...
Using Stream with IO channels like file operations, we need to close the stream explicitly using theclose()method. As we can see, theFilesAPI offers another easy way to read the file contents into aString. In the next sections, we’ll look at other less common methods of reading a file...
var fileName = "src/main/resources/thermopylae.txt"; var path = Paths.get(fileName); try (Stream<String> lines = Files.lines(path)) { lines.forEachOrdered(System.out::println); } } The contents of thethermopylae.txtfile are read and printed to the console using theFiles.linesmethod. ...
read()方法是比较好费时间的,如果为了提高效率我们可以使用BufferedReader对Reader进行包装,这样可以提高读取得速度,我们可以一行一行的读取文本,使用readLine()方法。 BufferedReader br = new BufferedReader(new InputStreamReader(new FileInputStream(“ming.txt”))); String data = null; while((data = br....
console.log("File contents: " + contents); }; reader.onerror = function(event) { console.error("File could not be read! Code " + event.target.error.code); }; reader.readAsText(file); 1. 2. 3. 4. 5. 6. 7. 8. 9.