Here is an example program to read a file line-by-line withScanner: ReadFileLineByLineUsingScanner.java packagecom.journaldev.readfileslinebyline;importjava.io.File;importjava.io.FileNotFoundException;importjava.util.Scanner;publicclassReadFileLineByLineUsingScanner{publicstaticvoidmain(String[]args){...
1. Java 8 Read File + Stream TestReadFile.java package com.mkyong.java8; import java.io.IOException; import java.nio.file.Files; import java.nio.file.Paths; import java.util.stream.Stream; public class TestReadFile { public static void main(String args[]) { String fileName = "c://l...
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 ...
* Read contents of a File line by line using BufferedReader * www.tutorialkart.com */publicclassExample{publicstaticvoidmain(Stringargs[]){Stringfilename="samplefile.txt";BufferedReaderbr=null;Stringline="";try{br=newBufferedReader(newFileReader(filename));System.out.println("---Contents of t...
A common pattern is to use try(BufferedReader br=newBufferedReader(newFileReader(file))){String line;while((line=br.readLine())!=null){// process the line.}} You can read the data faster if you assume there is no character encoding. e.g. ASCII-7 but it won't make much difference....
public static String readFileByLines(String fileName) { File file = new File(fileName); BufferedReader reader = null; StringBuilder body = new StringBuilder(); try { System.out.println("以行为单位读取文件内容,一次读一整行:"); reader = new BufferedReader(new FileReader(file)); ...
line++; } reader.close(); }catch(IOException e) { e.printStackTrace(); }finally{if(reader !=null) {try{ reader.close(); }catch(IOException e1) { } } } }/** * 随机读取文件内容*/publicstaticvoidreadFileByRandomAccess(String fileName) { ...
Read a text file line-by-line UseOkio.source(File)to open a source stream to read a file. The returnedSourceinterface is very small and has limited uses. Instead we wrap the source with a buffer. This has two benefits: It makes the API more powerful.Instead of the basic methods offered...
importjava.io.BufferedReader;importjava.io.FileReader;importjava.io.IOException;publicclassReadSpecificLinesFromFile{publicstaticvoidmain(String[]args){StringfilePath="test.txt";intstartLine=2;// 起始行intendLine=4;// 结束行intcurrentLine=0;try(BufferedReaderbr=newBufferedReader(newFileReader(filePath...
In Python, we read file line by line using different approaches based on clean syntax, ability to read large files, and memory efficiency.