java - How can I use "for" loop and "if" loop both together to verify the existence of xml elements in xml document -

i'm trying make login system. need check existence of xml elements ("username" , "password") in xml document. if match "username" , "password" need return true, otherwise false. use "for" loop go through entire document , use "if" loop validation. i'm using java , dom parser.

xml document:

<login> <user>     <username>sunimal</username>     <password>1111</password> </user> <user>     <username>naveen</username>     <password>852</password> </user> <user>     <username>chamara</username>     <password>12345</password> </user></login> 

java code:

boolean = false;     try {         file inputfile = new file("c:\\users\\kavindu\\documents\\netbeansprojects\\chatserver2\\xml\\userrecord2.xml");         documentbuilderfactory dbfactory                 = documentbuilderfactory.newinstance();         documentbuilder dbuilder = dbfactory.newdocumentbuilder();         document doc = dbuilder.parse(inputfile);          nodelist userlist = doc.getelementsbytagname("login");            (int = 0; < userlist.getlength(); i++) {             node user = userlist.item(i);             element eelement = (element) user;              if (eelement.getelementsbytagname("username").item(i).gettextcontent().equals(username) && eelement.getelementsbytagname("password").item(i).gettextcontent().equals(password)) {                  = true;             } else {                 = false;             }         }         } catch (exception ex) {      }     return a; } 

if input first elements("sunimal" , "1111"),i can true, other elements return false. tried "for" loop , "if" loop in different ways, couldn't result.i'm newly programming.

here solution; have checked in ide. thanks. :-)

to first element of tag need use index 0. eelement.getelementsbytagname("username").item(0)

when have matched user name , password need out loop,

a = true; break;

otherwise in next iteration set false again.

public boolean checklogin(){  boolean = false; try {     file inputfile = new file("c:\\users\\kavindu\\documents\\netbeansprojects\\chatserver2\\xml\\userrecord2.xml");     documentbuilderfactory dbfactory             = documentbuilderfactory.newinstance();     documentbuilder dbuilder = dbfactory.newdocumentbuilder();     document doc = dbuilder.parse(inputfile);     nodelist userlist = doc.getelementsbytagname("user");     system.out.println("userlist length :: "+ userlist.getlength());       (int = 0; < userlist.getlength(); i++) {         node user = userlist.item(i);         element eelement = (element) user;         if (eelement.getelementsbytagname("username").item(0).gettextcontent().equals(username) && eelement.getelementsbytagname("password").item(0).gettextcontent().equals(password)) {              = true;             break;         } else {             = false;         }     }     } catch (exception ex) {     system.out.println(ex.getmessage());  } return a;   }