packagecom.journaldev.readfileslinebyline;importjava.io.File;importjava.io.FileNotFoundException;importjava.util.Scanner;publicclassReadFileLineByLineUsingScanner{publicstaticvoidmain(String[]args){try{Scannerscanner=newScanner(newFile("sample.txt"));while(scanner.hasNextLine()){System.out.println(scann...
如果要逐行读取文件或基于一些Java正则表达式,Scanner是要使用的类。不是线程安全。 privatestaticvoidreadUsingScanner(String fileName)throwsIOException { Path path=Paths.get(fileName); Scanner scanner=newScanner(path); System.out.println("Read text file using Scanner");//read line by linewhile(scanner....
Data in the file: First Line Second Line Third Line Fourth Line Fifth Line In the above example, we have used the BufferedReader Class to read the file named input.txt. Example 3: Java Program to Read File Using Scanner import java.io.File; import java.util.Scanner; class Main { public...
我们可以使用Scanner类打开文件,然后逐行读取其内容。 Scanner程序使用定界符模式将其输入分为令牌,在本例中为新行: 代码语言:javascript 代码运行次数:0 运行 AI代码解释 try{// open file to readScanner scanner=newScanner(newFile("examplefile.txt"));// read until end of file (EOF)while(scanner.hasNext...
参考链接: Java中Scanner和BufferReader类之间的区别 我需要使用Java逐行读取大约5-6 GB的大型文本文件。 我如何快速做到这一点? #1楼 这是一个示例,该示例具有完整的错误处理并支持Java 7之前的字符集规范。使用Java 7,您可以使用try-with-resources语法,从而使代码更简洁。
Read text file with Scanner AScanneris simple text scanner which can parse primitive types and strings using regular expressions. Main.java import java.io.File; import java.io.FileNotFoundException; import java.util.Scanner; void main() throws FileNotFoundException { ...
scanner.close(); } Note that the default delimiter is the whitespace, but multiple delimiters can be used with aScanner. 4. Read with StreamTokenizer Next, let’s read a text file into tokens using a StreamTokenizer. The way the tokenizer works is – first, we need to figure out what ...
键盘读取--Scanner对象 数据输入/输出流(DataInputStream类与DataOutputStream类) 字符流的输入/输出类 字节流类 字节流由两个类层次结构定义。在顶层有两个抽象类:InputStream 和 OutputStream。 每个抽象类都有多个具体的子类,这些子类对不同的外设进行处理,例如磁盘...
FileReader负责打开指定路径的文件。然后通过循环调用readLine(）方法，逐行读取文件内容并打印出来。如果读取过程中出现异常，会捕获并打印异常堆栈信息。（二）使用Scanner读取文件 Scanner类也可以方便地读取文件。它可以按照不同的分隔符来解析文件内容。｀｀｀java import javaioFile;import javautilScanner;
First, we’ll learn how to load a file from the classpath, a URL, or from a JAR file using standard Java classes. Second, we’ll see how to read the content withBufferedReader,Scanner,StreamTokenizer,DataInputStream,SequenceInputStream,andFileChannel. We will also discuss how to read a ...