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java.lang.NullPointerException at MyField.actionPerformed(MyField.java:580)

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steps

Posts: 14
Nickname: spanishste
Registered: Nov, 2003

java.lang.NullPointerException at MyField.actionPerformed(MyField.java:580)

Posted: Jan 31, 2004 4:33 PM

Hello,
I've a GUI in swing and I'm doing user authentication.Mysql is the
database.The user enters the username, password and it has to check to the ones
in the db table.
pls help me.
class Accounts {
public Connection connection;
public Statement statement;
public Accounts() {
try {
Class.forName("com.mysql.jdbc.Driver").newInstance();
System.out.println("driver found");
} catch (Exception e) {
System.err.println("Unable to find and load driver");
System.exit(1);
}
connectToDB();
}
public void connectToDB() {
try {
connection = DriverManager.getConnection
("jdbc:mysql://localhost/accounts?user=root");
System.out.println("database connected");
statement = connection.createStatement();
/*if(statement == null) {
System.out.println("statement is null");
}
else {
System.out.println("statement created");
}*/
} catch(SQLException connectException) {
System.out.println(connectException.getMessage());
System.out.println(connectException.getSQLState());
System.out.println(connectException.getErrorCode());
System.exit(1);
}
}
private void displaySQLErrors(SQLException e) {
}
}
///////Button Action event code/////////////////
if (event.getActionCommand().equals(StopRC)){
try {
statement = connection.createStatement();<<<-----It points out the error here.This is line 580.
} catch (SQLException e1) {
e1.printStackTrace();
}
if(statement == null) {
System.out.println("statement is null");
}
username=Uname.getText();
password=Passwd.getText();
System.out.print ln(username);
System.out.println(password);
loadAccounts();

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