how to open all files in a directory in java, read them, creat new files, write to them -

i sorry dont have code, in few answers how make file , write it, have question. give path folder in compilation, , want each file ends .jack create same file name ends .xml

and open xml file , write it. exemple:

start.jack bet.jack => start.xml bet.xml 

and in each xml file write stuff according whats written in jack file.

so need open jack file, read it, , write xml file itself.

i hope explained myself correctly.

my code:

public string readfile(string filename) {    string content = null;    file file = new file(filename);    try {        filereader reader = new filereader(file);        char[] chars = new char[(int) file.length()];        reader.read(chars);        content = new string(chars);        reader.close();    } catch (ioexception e) {        e.printstacktrace();    }    return content; } 

i took lines stackoverflow, , worked perfectly

file f = new file("your folder path here");// folder path string filelist = f.list(); // gives list of files in folder.  for(string str : filelist){     if(str.endswith(".jack")){          // read content of file "str" , store in veriable           filereader reader = new filereader("your folder path"+str);         char[] chars = new char[(int) new file("your folder path"+str).length()];         reader.read(chars);        string content = new string(chars);         reader.close();           // write content in xml file           bufferedwriter bw = new bufferedwriter(          new filewriter("you folder path"+str.replace(".jack",".xml")));          bw.write(content); //now can  write variable in file.           bw.close();    } }