import java.io.*;
public class mystring {
public static void main(String[] args){
filter1 obj1=new filter1("txt");
boolean file_status;
File f1=new File("C:\\WINDOWS");
System.out.println("******************************");
String[] filelist=f1.list(obj1);
for(int i=0;i<filelist.length;i++){
File newfile=new File(filelist[i]);
file_status=newfile.isFile(); //此处
if (file_status)
System.out.println("file:"+newfile);
else
System.out.println("directory:"+newfile);
}
System.out.println("**********************************");
}
}class filter1 implements FilenameFilter{
String fileexent;
filter1(String extentobj){
fileexent=extentobj;
}
public boolean accept(File dir,String name){
return name.endsWith("."+fileexent);
}
}
public class mystring {
public static void main(String[] args){
filter1 obj1=new filter1("txt");
boolean file_status;
File f1=new File("C:\\WINDOWS");
System.out.println("******************************");
String[] filelist=f1.list(obj1);
for(int i=0;i<filelist.length;i++){
File newfile=new File(filelist[i]);
file_status=newfile.isFile(); //此处
if (file_status)
System.out.println("file:"+newfile);
else
System.out.println("directory:"+newfile);
}
System.out.println("**********************************");
}
}class filter1 implements FilenameFilter{
String fileexent;
filter1(String extentobj){
fileexent=extentobj;
}
public boolean accept(File dir,String name){
return name.endsWith("."+fileexent);
}
}
public static void main(String[] args){
filter1 obj1=new filter1("txt");
boolean file_status;
File f1=new File("C:\\WINDOWS");
System.out.println("******************************");
String[] filelist=f1.list();
for(int i=0;i<filelist.length;i++){
File newfile=new File(filelist[i]);
file_status=newfile.isDirectory(); //此处
if (!file_status)
System.out.println("file:"+newfile);
else
System.out.println("directory:"+newfile);
}
System.out.println("**********************************");
}
}
在list了目录下的文件列表之后
应该用 File(path,fileName)来构造文件,不该用File(fileName)
修正为String[] filelist=f1.list(obj1);
for(int i=0;i<filelist.length;i++)
{
File newfile=new File(f1.getPath(),filelist[i]);//此处
file_status=newfile.isFile();
if (file_status)
System.out.println("file:"+newfile);
else
System.out.println("directory:"+newfile);
}
System.out.println("**********************************");
}
File f1=new File("C:\\WINDOWS");
if(!f1.exist())
return;
if(f1.isFile())
return;