SQL Command To Delete Entry In Current Textfields For Java App -

i have java program connect database running tomcat. app includes fields first name, last name, email, phone. created button when clicked allows add entries in text fields database.

below have shown structure of adding entry. use same method removing client entry. problem sql command. not sure how write it.

question: need sql command (like adding client) can have data database loaded in fields , take info , delete specific entry in database. please help.

insert client (in queries class):

//create insert adds new entry database             insertnewperson = connection.preparestatement(                     "insert addresses " +                      "(firstname, lastname, email, phonenumber ) " +                     "values (?, ?, ?, ?)" ); 

method add person (in queries class):

//add entry     public int addperson(             string fname, string lname, string email, string num)     {         int result = 0;          //set parameters, execute insertnewperson         try {             insertnewperson.setstring(1, fname);             insertnewperson.setstring(2, lname);             insertnewperson.setstring(3, email);             insertnewperson.setstring(4, num);              //insert new entry; return # of rows updated             result = insertnewperson.executeupdate();         }//end try         catch(sqlexception sqlexception) {             sqlexception.printstacktrace();             close();         }//end catch          return result;     }//end method addperson 

action performed (in application class , gui):

//handles call when insertbutton clicked             private void insertbuttonactionperformed(actionevent evt)             {                 int result = personqueries.addperson(firstnametextfield.gettext(), lastnametextfield.gettext(), emailtextfield.gettext(), phonetextfield.gettext());                  if (result == 1)                     joptionpane.showmessagedialog(this,"person added!", "person added", joptionpane.plain_message);                 else                     joptionpane.showmessagedialog(this, "person not added!", "error", joptionpane.plain_message);                   browsebuttonactionperformed(evt);             }//end method insertbuttonactionperformed 

if understand correctly:

delete     addresses     firstname = <your value here> ,     lastname = <your value here> ,     email = <your value here> ,     phonenumber = <your value here> 

this delete addresses conditions true.

a more elegant solution 1 delete row primary key.