Java:IOException 的危险自返回递归函数？

Question

我在使用 if 子句时遇到了非常错误的异常处理。如果找不到路径，则会发生异常。异常再次返回该函数。该函数是递归的。安全吗？

$ javac SubDirs.java $ java SubDirsGive me an path..Dir1Dir2Give me an path.IT WON'T FIND ME, SO IT RETURNS ITSELF due to Exception caughtGive me an path.

The code of Subdirs.java looks like this:

import java.io.*;
import java.util.*;

public class SubDirs {
    private List<File> getSubdirs(File file) throws IOException {
        List<File> subdirs = Arrays.asList(file.listFiles(new FileFilter() {
                    public boolean accept(File f) {
                    return f.isDirectory();
                    }
                    }));
        subdirs = new ArrayList<File>(subdirs);

        List<File> deepSubdirs = new ArrayList<File>();
        for(File subdir : subdirs) {
            deepSubdirs.addAll(getSubdirs(subdir)); 
        }
        subdirs.addAll(deepSubdirs);
        return subdirs;
    }

    public static void search() {
        try{
            BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
            String s;
            System.out.println("Give me an path.");
            while ((s = in.readLine()) != null && s.length() != 0){
                SubDirs dirs = new SubDirs();
                List<File> subDirs = dirs.getSubdirs(new File(s));
                for ( File f : subDirs ) {
                    System.out.println(f.getName());
                }
                System.out.println("Give me an path.");
            }
        }catch(Exception e){
                    // Simple but is it safe?
            search();
        }
    }

    public static void main(String[] args) throws IOException {
        search();
    }
}

Answer 1

是的，在您输入错误路径数千次之前，它是安全的。