Write a Java program to read the first 3 lines of a file. Sample Solution: Java Code: importjava.io.BufferedReader;importjava.io.FileNotFoundException;importjava.io.LineNumberReader;importjava.io.IOException;importjava.io.InputStreamReader;importjava.io.FileInputStream;publicclassExercise17{publicstat...
为了读取特定行,我们可以使用BufferedReader的lines()方法来获取文件的所有行,然后使用skip()方法跳过前面的行,最后读取我们需要的行。 下面是一个示例代码,演示了如何读取文件的第三行: importjava.io.BufferedReader;importjava.io.FileReader;importjava.io.IOException;publicclassReadSpecificLineFromFile{publicstaticvo...
TheBufferedReaderreads text from a character-input stream, buffering characters so as toprovide for the efficient reading of characters, arrays, and lines by minimizing the number of I/O operations. 1.1. Creating BufferedReder To use aBufferedReader, we should wrap it around anyReaderwhoseread()o...
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...
//file中的 line数据格式:name,age,address -> NAME,AGE,ADDRESS, String[] contents = line.split(","); for (int i=0;i newLine.concat(contents[i].toLowerCase()); } lines.add(newLine); //将处理后的数写入新的文件 outFile FileUtils.writeLines(outFile,lines,true); ...
}/*** 以行为单位读取文件,常用于读面向行的格式化文件*/publicstaticvoidreadFileByLines(String fileName) { File file=newFile(fileName); BufferedReader reader=null;try{ System.out.println("以行为单位读取文件内容,一次读一整行:"); reader=newBufferedReader(newFileReader(file)); ...
PathfilePath=Paths.get("c:/temp","data.txt");try(Stream<String>lines=Files.lines(filePath)){lines.forEach(System.out::println);}catch(IOExceptione){//...} 2. Reading and Filtering the Lines In this example, we will read the file content as a stream of lines. Then we will filter...
packagecom.journaldev.readfileslinebyline;importjava.io.IOException;importjava.nio.file.Files;importjava.nio.file.Paths;importjava.util.List;publicclassReadFileLineByLineUsingFiles{publicmain]args){try{List<String>allLines=Files.readAllLines(Paths.get("sample.txt"));for(Stringline:allLines){System....
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. ...
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://lines.txt"; //read file into stream, try-with-resources ...