Java Scanner类读取文件内容的技巧

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猴君
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使用Java的Scanner类读取文件内容可以非常方便和灵活。以下是一些技巧和示例代码:

  1. 使用Scanner类读取文件内容:
import java.io.File; import java.io.FileNotFoundException; import java.util.Scanner;  public class Main {     public static void main(String[] args) {         try {             File file = new File("example.txt");             Scanner scanner = new Scanner(file);             while (scanner.hasNextLine()) {                 String line = scanner.nextLine();                 System.out.println(line);             }             scanner.close();         } catch (FileNotFoundException e) {             System.out.println("File not found.");         }     } } 
  1. 使用Scanner类读取文件内容并按指定分隔符进行分割:
import java.io.File; import java.io.FileNotFoundException; import java.util.Scanner;  public class Main {     public static void main(String[] args) {         try {             File file = new File("example.txt");             Scanner scanner = new Scanner(file);             scanner.useDelimiter(",");             while (scanner.hasNext()) {                 String data = scanner.next();                 System.out.println(data);             }             scanner.close();         } catch (FileNotFoundException e) {             System.out.println("File not found.");         }     } } 
  1. 使用Scanner类读取文件内容并跳过指定数量的行:
import java.io.File; import java.io.FileNotFoundException; import java.util.Scanner;  public class Main {     public static void main(String[] args) {         try {             File file = new File("example.txt");             Scanner scanner = new Scanner(file);             int linesToSkip = 2;             for (int i = 0; i < linesToSkip; i++) {                 if (scanner.hasNextLine()) {                     scanner.nextLine();                 }             }             while (scanner.hasNextLine()) {                 String line = scanner.nextLine();                 System.out.println(line);             }             scanner.close();         } catch (FileNotFoundException e) {             System.out.println("File not found.");         }     } } 

通过以上几种方法,可以灵活地使用Scanner类读取文件内容,并根据需要进行处理和操作。

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