Write a Java program to read the first 3 lines of a file.Sample Solution:Java Code:import java.io.BufferedReader; import java.io.FileNotFoundException; import java.io.LineNumberReader; import java.io.IOException; import java.io.InputStreamReader; import java.io.FileInputStream; public class ...
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...
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...
误以为readLine()是读取到没有数据时就返回null(因为其它read方法当读到没有数据时返回-1),而实际上readLine()是一个阻塞函数,当没有数据读取时,就一直会阻塞在那,而不是返回null;因为readLine()阻塞后,System.out.println(message)这句根本就不会执行到,所以在接收端就不会有东西输出。要想执行到System.out.p...
}/*** 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)); ...
原文地址:http://www.baeldung.com/java-read-lines-large-file 1. Overview This tutorial will showhow to read all the lines from a large file in Javain an efficient manner. This article is part ofthe “Java – Back to Basic” tutorialhere on Baeldung. ...
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...
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 all lines from a file. C# 複製 [Android.Runtime.Register("readAllLines", "(Ljava/nio/file/Path;Ljava/nio/charset/Charset;)Ljava/util/List;", "", ApiSince=26)] public static System.Collections.Generic.IList<string>? ReadAllLines (Java.Nio.FileNio.IPath? path, Java.Nio.Charset.Char...
importjava.io.FileReader;importjava.io.IOException;importjava.util.Scanner;publicclassFileReadDemo{publicstaticvoidmain(String[] args)throwsIOException{// Open the file.FileReader fr =newFileReader("ocean.txt"); Scanner inFile =newScanner(fr);// Read lines from the file till end of filewhile(inF...