分享非常有用的Java程序 (关键代码) (二)---列出文件和目录

 
File dir = new File("directoryName");     
String[] children = dir.list();     
if (children == null) {         
// Either dir does not exist or is not a directory     
} else {         
for (int i=0; i < children.length; i++) {             
// Get filename of file or directory             
String filename = children[i];         
}     
}        
// It is also possible to filter the list of returned files.     
// This example does not return any files that start with `.'.     
FilenameFilter filter = new FilenameFilter() {         
public boolean accept(File dir, String name) {             
return !name.startsWith(".");         
}     
};     
children = dir.list(filter);        
// The list of files can also be retrieved as File objects     
File[] files = dir.listFiles();        
// This filter only returns directories     
FileFilter fileFilter = new FileFilter() {         
public boolean accept(File file) {             
return file.isDirectory();         
}     
};     
files = dir.listFiles(fileFilter); 
 

 

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