runtime - get mysqldump error message from java -

i dumped data using java runtime.exec.
now want handle exceptions "mysqldump: got error: 1045: access denied user 'errre'@'localhost' (using password: yes) when trying connect"
when put error username or password or bad condition

but got process.geterrorstream() "warning: using password on command line interface can insecure." , getinputstream() null

in terminal, output this:
mysqldump -uerror -p123456 erp_sys warning: using password on command line interface can insecure. mysqldump: got error: 1045: access denied user 'error'@'localhost' (using password: yes) when trying connect

i did research, still can't find way mysqldump error.anyone has experiences this?

i don't know. works me:

import java.io.bytearrayoutputstream; import java.io.inputstream; import java.io.outputstream; import java.nio.charset.charset;  import org.apache.commons.io.ioutils;  public class mysqltest {     public static void main(string[] args) throws exception {         process p = new processbuilder("mysqldump", "-u", "error", "-p123456", "erp_sys").start();         bytearrayoutputstream dmp = new bytearrayoutputstream();         // use fileoutputstream dmp = ... in real cases.         thread t1 = copystreamsinbackground(p.getinputstream(), dmp);         bytearrayoutputstream err = new bytearrayoutputstream();         thread t2 = copystreamsinbackground(p.geterrorstream(), err);         t1.join();         t2.join();         int exitcode = p.waitfor();         if (exitcode != 0) {             system.err.println("exit code: " + exitcode);             string errors = new string(err.tobytearray(), charset.forname("utf-8"));             system.err.println(errors);         } else {             system.out.println("exit code: " + exitcode);             string dumps = new string(dmp.tobytearray(), charset.forname("utf-8"));             system.out.println(dumps);         }     }      private static thread copystreamsinbackground(final inputstream is, final outputstream os) {         thread t = new thread(new runnable() {             @override             public void run() {                 try {                     ioutils.copy(is, os);                     os.close();                 } catch (exception ex) {                     ex.printstacktrace();                     throw new illegalstateexception(ex);                 }             }         });         t.start();         return t;     } } 

it prints:

exit code: 2 mysqldump: got error: 1045: access denied user 'error'@'localhost' (using password: yes) when trying connect