@TestpublicvoidwhenReadUsingScanner_thenCorrect()throwsIOException {StringfirstLine="Hello world";FileInputStreaminputStream=newFileInputStream("test.txt");Scannerscanner=newScanner(inputStream);Stringresult=scanner.nextLine(); assertEquals(firstLine, result); scanner.useDelimiter(", "); assertEquals("Hi...
We then created a Scanner object associated with the file. Here, we have used the scanner methods hasNextLine() - returns true if there is next line in the file nextLine() - returns the entire line from the file To learn more on scanner, visit Java Scanner....
Scanner对象,它附属于”标准输入流 Scanner in = new Scanner(System.in); 现在我们就可以使用Scanner...
import java.util.Scanner; public class ReadingEntireFileWithoutLoop{ public static void main(String[] args) throws FileNotFoundException{ File file = new File("C:\\Users\FXUmjoxUZbpankaj\\Desktop\\test.txt"); Scanner sc = new Scanner(file); sc.useDelimiter("\\Z"); System.out.println(sc...
TheScanner.nextLine()method consumes the entire line, including the line separator. However, it only returns the text without the newline character at the end,then sets the position to the beginning of the next line: // nextLine()Scannersc1=newScanner(input);intnum1=Integer.parseInt(sc1.next...
Here is an example program to read a file line-by-line with: ReadFileLineByLineUsingScanner.java packagecom.journaldev.readfileslinebyline;importjava.io.File;importjava.io.FileNotFoundException;importjava.util.Scanner;publicclassReadFileLineByLineUsingScanner{publicstaticvoidmain(String[]args){try{...
line1 line2 line3 line4 line5 2. Java 8 Read File + Stream + Extra This example shows you how to use Stream to filter content, convert the entire content to upper case and return it as a List. TestReadFile2.java package com.mkyong.java8; ...
String currentLine = reader.readLine(); reader.close(); assertEquals(expected_value, currentLine); } Note that readLine() will return null when the end of the file is reached. 3. Read with Scanner Next, let’s use a Scanner to read from the File – the file contains: 1 Hello world ...
In Sun’s Streaming XML Parser implementation, the Xerces2 lower layers, particularly the Scanner and related classes, have been redesigned to behave in a pull fashion. In addition to the changes in the lower layers, the Streaming XML Parser includes additional StAX-related functionality and many...
要读取整个输入流,请执行以下操作: Scanner sc = new Scanner(x).useDelimiter("\\A"); then just: String entireInput = sc.next(); 这是通过将标记分隔符设置为所有输入的开始来实现的,当然在读取任何字节后都不会遇到该分隔符,因此“下一个”标记就是整个输入。