此程序正在编译但不起作用。它只是处理打开文件异常。请帮助我。谢谢你的时间。
import java.io.*;
import java.util.Scanner;
public class ReadingFile {
/**
* @param args
*/
public static void main(String[] args) {
ReadingFile rf = new ReadingFile();
rf.printOnScr();
}
private BufferedReader openFile(String meString){
Scanner sc = new Scanner(System.in);
BufferedReader bf = null;
while (bf == null) {
try {
System.out.println("Enter a file name");
String fileName = sc.nextLine();
FileReader b = new FileReader(fileName);
bf = new BufferedReader(b);
} catch (IOException e) {
System.out.println("The file you are trying to open dose not exist.");
}
}
return bf;
}
private void printOnScr() {
BufferedReader br = openFile("Please enter a file");
try {
while(true){
String line = br.readLine();
if(line == null) break;
System.out.println(line);
}
br.close();
} catch (IOException e) {
System.out.println("The line you are trying to access have problem/s");
}
}
}
答案 0 :(得分:1)
很可能在键入文件时没有指定文件的正确路径。它应该是绝对路径或基于当前工作目录的相对路径。但是,要确切了解发生了什么,您需要查看引发的异常。用
打印出来e.printStackTrace()
或将其包装在未经检查的异常中:
throw new IllegalStateException(e);
或者从openFile(),printOnScr()和main()
中抛出IOException