java - get Nullpointerexception while insert records -

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• what nullpointerexception, , how fix it? 12 answers

i trying insert data database using prepare statements nullpointerexception

my database connection code

public class dbconnect {     connection conn=null;        public static connection connecrdb(){           try{           class.forname("org.sqlite.jdbc");           connection conn = drivermanager.getconnection("jdbc:sqlite:e:\\netbeansprojects\\abdo`s project\\project.sqlite");               system.out.println("connection success");               conn.setautocommit(false);           return conn;           }           catch(exception e){               joptionpane.showmessagedialog(null, e);               return null;           }       }  } 

and code in main class

public class items extends javax.swing.jframe {       connection conn =null;     resultset rs = null;     preparedstatement pst=null;     public items() {         initcomponents();         dbconnect.connecrdb();     }      private void savebtnactionperformed(java.awt.event.actionevent evt) {                                                  try{              string sql = "insert test (name) values(?)";            pst=conn.preparestatement(sql);            pst.setstring(1,item_name.gettext() );            pst.executeupdate();             conn.commit();         }         catch(exception e ){                       system.out.println(e);             system.out.println(e.getstacktrace());           }       }  

output is

java.lang.nullpointerexception  [ljava.lang.stacktraceelement;@7da469fe 

what wrong in code ?

conn null in savebuttonactionperformed. initialize in item class:

public class items extends javax.swing.jframe {      connection conn = drivermanager.getconnection("jdbc:sqlite:e:\\netbeansprojects\\abdo`s project\\project.sqlite"); 

you can initialize inside method, sure initialize before use it.