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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:
- 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."); } } }
- 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."); } } }
- 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。