Just like there are many ways for writing String to text file, there are multiple ways to read String form File in Java. You can use FileReader, BufferedReader, Scanner, and FileInputStream to read text from file. One thing to keep in mind is character encoding. You must use correct ...
Java中的Scanner对象,可以扫描String,利用hasNext()和next()可以探测输入流中是否有下一个字符串和获取下一个字符串。 例如:Scanner s = new Scanner("aa bb cc "); 那么对于代码: while(s.hasNext()){ print(s.next(); } 会输出: aa bb cc 也就是说以空格符来分割字符串。 我们还知道,这个字符串可...
import java.util.*; class Continue{ public static void main(String[] args){ Scanner scanner...Pless presss any key to continue."); String key=scanner.next(); } } 但是这样写一定要回车才可以,而且不可以在输入第一个字符的时候就 68690 ...
ReadFileLineByLineUsingScanner.java packagecom.journaldev.readfileslinebyline;importjava.io.File;importjava.io.FileNotFoundException;importjava.util.Scanner;publicclassReadFileLineByLineUsingScanner{publicstaticvoidmain(String[]args){try{Scannerscanner=newScanner(newFile("sample.txt"));while(scanner.hasNe...
Java字节流read函数 问题引入 做Java作业从标准输入流获取用户输入,用到了System.in.read(),然后出现了bug。 //随机生成一个小写字母,用户猜5次,读取用户输入,并判断是否猜对importjava.io.IOException;publicclassLetterGuessing{publicstaticvoidmain(String[] args)throwsIOException {charch,answer;//随机生成字母...
1.Scanner in=new Scanner(System.in); String get=in.next(); 2、 File file = new File ("D://..."); Scanner in = new Scanner(file); String s = in.next(); 用法1是接收用户输入的数据 用法2是读入文件内容 这种方法较为常用
6. Reading withScanner Next let’s use aScannerto read from the File. Here we’ll use whitespace as the delimiter: @Test public void whenReadWithScanner_thenCorrect() throws IOException { String file = "src/test/resources/fileTest.txt"; ...
import java.util.Scanner; /** * An example program to read a String from console input in Java */ public class Example { public static void main(String[] args) { System.out.print("Enter a string : "); Scanner scanner = new Scanner(System. in); ...
For our first examples, we’ll use the Scanner class in the java.util package to obtain the input from System.in— the “standard” input stream: Scanner scanner = new Scanner(System.in); Let’s use the nextLine() method to read an entire line of input as a String and...
Alternatively, you can use the IOUtils class from Apache Commons IO to read the entire InputStream into a String: InputStream inputStream = ...; String result = IOUtils.toString(inputStream, StandardCharsets.UTF_8); You can also use the Scanner class to read the InputStream: InputSt...