public class Test {
 public static void main(String[] args) {
  String str = "doc\\test\\tes.java";
  System.out.println(str);// print 'doc\test\tes.java'
  String strtest = str.replaceAll("\\\\", "/");
  System.out.println(strtest);// print 'doc/test/tes.java'
 }
}