InputStreamReader (InputStream in, Charset cs)// 创建使用给定字符集的 InputStreamReader。 InputStreamReader (InputStream in, CharsetDecoder dec)// 创建使用给定字符集解码器的 InputStreamReader。 InputStreamReader (InputStream in, String charsetName)// 创建使用指定字符集的 InputStreamReader。 InputStre...
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...
Using the Scanner class We can read the input using the Scanner class: importjava.util.*;publicclassMain{publicstaticvoidmain(String[]args){// Use the Scanner classScannersc=newScanner(System.in);/* int n = sc.nextInt(); // read input as integer long k = sc.nextLong(); // read i...
java-System.in.read()方法与java.util.Scanner类的读取输入差别 执行System.in.read()方法将从键盘缓冲区读入一个字节的数据,然而返回的16位的二进制数据,其低8位为键盘的ASCII码,高8位为0 Java 5添加了java.util.Scanner类,这是一个用于扫描输入文本的新的实用程序。 它是以前的StringTokenizer和Matcher类...
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 ...
To read a string from Console as input in Java applications, you can useScannerclass along with theInputStream,System.in. When you are developing console applications using Java, it is very important that you read input from user through console. ...
packagecom.journaldev.readfileslinebyline;importjava.io.File;importjava.io.FileNotFoundException;importjava.util.Scanner;publicclassReadFileLineByLineUsingScanner{publicstaticvoidmain(String[]args){try{Scannerscanner=newScanner(newFile("sample.txt"));while(scanner.hasNextLine()){System.out.println(scann...
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
String line = scanner.nextLine(); System.out.println(line); } The file is read line by line with thenextLinemethod. Read text file with InputStreamReader InputStreamReaderis a bridge from byte streams to character streams. It reads bytes and decodes them into characters using a specified cha...
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...