我们可以使用Scanner类打开文件,然后逐行读取其内容。 Scanner程序使用定界符模式将其输入分为令牌,在本例中为新行: 代码语言:javascript 代码运行次数:0 运行 AI代码解释 try{// open file to readScanner scanner=newScanner(newFile("examplefile.txt"));// read until end of file (EOF)while(scanner.hasNext...
5.3. Reading a File UsingFiles.lines() JDK8 offers thelines()method inside theFilesclass. It returns aStreamof String elements. Let’s look at an example of how to read data into bytes and decode it using UTF-8 charset. The following code reads the file using the newFiles.lines(): @...
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{S...
if (loopCount == 2){print("进入read执行第" + readCount + "次");readCount++;loopCount++;return 1;}//其他的时候返回1,但是并不往Buffer中存放数据,来骗被调用者hasNext(),来观察出现了什么现象 if (loopCount == 3){print("进入read执行第" + readCount + "次");readCount++;loopCount++;ret...
Java read text files tutorial shows how to read text files in Java. We use build-in tools including FileReader, InputStreamReader, and Scanner.
scanner.close(); } Note that the default delimiter is the whitespace, but multiple delimiters can be used with aScanner. 4. Read with StreamTokenizer Next, let’s read a text file into tokens using a StreamTokenizer. The way the tokenizer works is – first, we need to figure out what ...
scanner.close(); } catch (Exception e) { e.printStackTrace(); } } } Output sdfdsfdsfsdfsHelloworld Using NIO pacakge Using NIO package we have Files.ReadAllBytes method. Using this we can read file as byte array. Then we can convert this into a string as like below example ...
2 Scanner java.util.Scanner是Java5的新特征,主要功能是简化文本扫描,这个类最实用的地方表现在获取控制台输入。当通过new Scanner(System.in)创建一个Scanner,控制台会一直等待输入,直到敲回车键结束,把所输入的内容传给Scanner,作为扫描对象。如果要获取输入的内容,则只需要调用Scanner的nextLine()方法即可。
3.1. Using Scanner Here, we’re going to use a java.util.Scanner to run through the contents of the file and retrieve lines serially, one by one: FileInputStream inputStream = null; Scanner sc = null; try { inputStream = new FileInputStream(path); sc = new Scanner(inputStream, "UTF...
A scanner will default to interpreting numbers as decimal unless a different radix has been set by using the useRadix(int) method. The reset() method will reset the value of the scanner's radix to 10 regardless of whether it was previously changed. ...