private File createrunbat(String str,String par)
 {
 if(str.startsWith("Text Editor-",0))
 {
     str=str.replaceFirst("Text Editor-","");
 }
 String sng,s2;
 File fe;
 try{

 FileOutputStream fos;
 DataOutputStream dos;

 sng=str;

 int a=sng.indexOf(".");

 sng=sng.substring(0,a);

 file=new File(jfc.getSelectedFile().getParent(),sng+".bat");

 fd=file.getAbsoluteFile();

 str=fd.getParent().substring(0, 2);

 fos=new FileOutputStream(file);
 dos=new DataOutputStream(fos);

 dos.writeBytes("@echo off n");
 dos.writeBytes("cd\"+"n");

 if(fd.getParentFile().isDirectory())
 {
     dos.writeBytes(str+"n");
 }
 s2=jfc.getSelectedFile().getParent();//I am having single quote problem from here
 dos.writeBytes("cd "+s2+"\"+"n");
 dos.writeBytes("javac "+sng+".java"+"n");
 dos.writeBytes("java "+sng+" "+par+"n");
 dos.writeBytes("pause n");
 dos.writeBytes("exit n");
 dos.close();
 }
 catch(FileNotFoundException ex)
 {
 }
 catch(IOException ex2)
 {
     JOptionPane.showMessageDialog(this,ex2.toString());
 }

  return fd;
 }

Windows cannot find 'C:Program'.

'C:Program FilesSomePlace...'
           ^ gets cut on whitespace and becomes two arguments instead of one:
'C:Program' and 'FilesSomePlace...'

'"C:Program FilesSomePlace..."'
 ^ quotes will keep the path together as a single argument

String safePath = String.format(""%s"", jfc.getSelectedFile().getParent().getAbsolutePath());

dos.writeBytes ("cd "" + s2 +"""+"n");