小编use*_*955的帖子

可能重复:
为什么我会得到"例外; 当我尝试编译我的Java代码时,必须被捕获或声明被抛出？

谢谢你解决我的第一个问题,我现在收到一个新的错误

import java.io.*;
import javax.swing.*;

public class FileBrowser {
    public static void main(String[] args) throws IOException {

        JFileChooser chooser = new JFileChooser();
        chooser.showOpenDialog(null);
        File file = chooser.getSelectedFile();
        String filename = file.getName();
        System.out.println("You have selected: " + filename);

        FileReader fr = new FileReader("filename"); 
        BufferedReader br = new BufferedReader(fr); 
        String s; 
        while((s = br.readLine()) != null) { 
            System.out.println(s); 
        } 
        fr.close(); 
    }
}

错误:

java.io.FileNotFoundException: filename (The system cannot find the file specified)
    at java.io.FileInputStream.open(Native Method)
    at java.io.FileInputStream.<init>(FileInputStream.java:138)
    at java.io.FileInputStream.<init>(FileInputStream.java:97) …