Some actions about folders

ImportJava.io.*; Public classFileoperate {//Create the specified directory    voidmakedirectory (String dirName) {File file=NewFile (DirName);//instantiating a File object        Try{            if(File.exists ()) {System.out.println (DirName+ "already exists"); }            Else{file.mkdir (); System.out.println (DirName+ "was created!"); }        }Catch(Exception e) {e.printstacktrace (); }    }            //empties all files in the specified directory    voidemptydirectory (String dirName) {File file=NewFile (DirName);//instantiating a File object        if(File.isdirectory ())//If the file object is a folder{File f[]= File.listfiles ();//Remove all files from this folder                         for(inti=0;i<f.length;i++) {f[i].delete (); }        }        Else{//Delete a file if it is not a folderFile.delete (); }                                        }        //Lists all file recursion under the specified directory    voidListall (String dirName) {File file=NewFile (DirName);//instantiating a File object        if(File.isdirectory ())//If the file object is an object{File f[]= File.listfiles ();//Remove all files from this folder            if(f!=NULL)            {                 for(inti=0;i<f.length;i++) {//to process each element of a file arrayListall (F[i].tostring ());//recursively process the file                }            }        }Else                                    //output file information directly if it is not a folderSystem.out.println (file); }    //get all filenames named under a suffix in the specified directory ·     voidGettypepart (String dirname,string flag) {File file=NewFile (DirName);//instantiating a File object        if(File.isdirectory ())//If the file object is an object{File f[]= File.listfiles ();//Remove all files from this folder            if(f!=NULL)            {                 for(inti=0;i<f.length;i++) {//to process each element of a file arrayListall (F[i].tostring ());//recursively process the file                }            }        }        Else if(File.getname (). EndsWith (flag)) {//output file information directly if it is not a folderSystem.out.println (file); }                                        }            //strline.indexof ("Hello", id)! =-1//fuzzy search for specified files under specified directory    voidsearchfile (String dirname,string key) {File file=NewFile (DirName);//instantiating a File object        if(File.isdirectory ())//If the file object is an object{File f[]= File.listfiles ();//Remove all files from this folder            if(f!=NULL)            {                 for(inti=0;i<f.length;i++) {//to process each element of a file arrayListall (F[i].tostring ());//recursively process the file                }            }        }        Else if(File.getname (). IndexOf (key,0)!=-1) {//output file information directly if it is not a folderSystem.out.println (file); }                                }         Public Static voidMain (string[] args) {//TODO auto-generated Method Stub            }}

Some actions about folders