数据结构
网络
RDBMS
操作系统
Java
MS Excel
iOS
HTML
CSS
Android
Python
C 编程
C++
C#
MongoDB
MySQL
Javascript
PHP
物理
化学
生物
数学
英语
经济学
心理学
社会学
时尚研究
法律研究如何在 Java 中查找文本文件中的字符串？
下面的 Java 程序从用户处接受一个字符串值，验证文件是否包含给定的字符串，并打印出该单词出现的次数。
示例
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.util.Scanner;
public class FindingWordFromFile {
public static void main(String args[]) throws FileNotFoundException {
//Reading the word to be found from the user
Scanner sc1 = new Scanner(System.in);
System.out.println("Enter the word to be found");
String word = sc1.next();
boolean flag = false;
int count = 0;
System.out.println("Contents of the line");
//Reading the contents of the file
Scanner sc2 = new Scanner(new FileInputStream("D:\sampleData.txt"));
while(sc2.hasNextLine()) {
String line = sc2.nextLine();
System.out.println(line);
if(line.indexOf(word)!=-1) {
flag = true;
count = count+1;
}
}
if(flag) {
System.out.println("File contains the specified word");
System.out.println("Number of occurrences is: "+count);
} else {
System.out.println("File does not contain the specified word");
}
}
}输出
Enter the word to be found the Contents of the line Tutorials Point originated from the idea that there exists a class of readers who respond better to online content and prefer to learn new skills at their own pace from the comforts of their drawing rooms. The journey commenced with a single tutorial on HTML in 2006 and elated by the response it generated, we worked our way to adding fresh tutorials to our repository which now proudly flaunts a wealth of tutorials and allied articles on topics ranging from programming languages to web designing to academics and much more. 40 million readers read 100 million pages every month Our content and resources are freely available and we prefer to keep it that way to encourage our readers acquire as many skills as they would like to. We don’t force our readers to sign up with us or submit their details either. No preconditions and no impediments. Simply Easy Learning! File contains the specified word Number of occurrences is: 3
更新于： 10-9-2019
7K+ 浏览量
广告