java - Uploading file using selenium javascript error -

i have browse button browse file. after browsing there import button import file. i'm able browse path using following code:

public static void uploadfiles(string object, string data) {             try {                 string filemode="";                 capabilities cap = ((remotewebdriver) driver).getcapabilities();                 string browsername = cap.getbrowsername();                 //system.out.println(browsername);                 if (browsername.contains("chrome")){                      filemode= "open";                 }                 else if (browsername.contains("firefox")){                      filemode= "file upload";                 }                 else if (browsername.contains("explorer")){                      filemode = "choose file upload";                 }                 string exe_file=driverscript.exe_filename;                 string[] command={exe_file,filemode,data};                   runtime.getruntime().exec(command);                 thread.sleep(5000);              } catch (exception e) {              }         } 

but when click on import button after "javascript error (warning: server did not provide stacktrace information)" exception thrown. exe_file path fileload.exe used browsing

uploading file using selenium:

webelement upload = driver.findelement(by.id("identifier of input tag")); upload.sendkeys("path file");