Question

While running the following code i am getting the error java.lang.OutOfMemoryException : java heap space

My code is:

public class openofficeupdate {
String databaseurl="C:\\mydbdir\\location\\salesforce"; // Path of the base after renaming and extraction
openofficeupdate() throws ClassNotFoundException, SQLException{
    System.out.println("Entered into constructor");
    Connection connection=null;
    Statement statement=null;
   try{
    Class c=openofficeclass();
    System.out.println("Class name set");

    Connection cntn=createConnection(databaseurl);
    connection=cntn;
    System.out.println("connection created");

    Statement stmt=createStatement(cntn);
    statement=stmt;
    System.out.println("Statement created");

    executeQueries(stmt);
    System.out.println("Query executed");

    closeStatement(stmt);
    System.out.println("Statement closed");

    closeConnection(cntn);
    System.out.println("Connection closed");

    }catch(Exception e){
        System.out.println(e);

        closeStatement(statement);
        System.out.println("Statement closed");

        closeConnection(connection);
        System.out.println("Connection closed");
    }
}
public static void main(String args[]) throws ClassNotFoundException, SQLException{
    new openofficeupdate();
}

private Class openofficeclass() throws ClassNotFoundException {
    return Class.forName("org.hsqldb.jdbcDriver");
}

private Connection createConnection(String databaseurl) throws SQLException{
    return DriverManager.getConnection("jdbc:hsqldb:file:" +databaseurl,"sa","");
}

private Statement createStatement(Connection cntn) throws SQLException{
    return cntn.createStatement();
}

private void closeStatement(Statement stmt) throws SQLException{
    stmt.close();
}

private void closeConnection(Connection cntn) throws SQLException{
    cntn.close();
}

private void executeQueries(Statement stmt) throws SQLException{
    System.out.println("Going to execute query");
    int status=stmt.executeUpdate("insert into \"Mobiles\" values(9874343210,123,'08:30:00','09:30:06')");
          12','2010-12-14','c','Casula')");
    System.out.println("Query executed with status "+status);
 }
}

I am using NetBeans IDE… Is there any option there to control this kind of errors?

Answer 1

In Netbeans 7.0:

• You can right click on the project, and select Properties.

• Click on Run category and insert you configuration in VM Options

• For instance, in your case, paste: -Xmx512m (512Mb) as suggested by rm5248

You can read Playing with JVM / Java Heap Size for further information.