How to read MDB file in java

[Anandv]

i want read a (.accdb) file and i approached by this way .Below is code but i am getting this error-- java.lang.NullPointerException
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package mdb;

import java.io.File;
import java.io.IOException;
import java.util.Map;

import com.healthmarketscience.jackcess.Database;
import com.healthmarketscience.jackcess.Table;
import com.healthmarketscience.jackcess.query.Query.Row;
import mdb.DatabaseBuilder;


public class Readwritemdb {

public static void main(String[] args) throws IOException {
try {
String path="D:\\Anand\\mymdb.accdb";
Database db = DatabaseBuilder.open(new File(path));
System.out.println("dbbb--"+db);
Table table = db.getTable("ContractInfo");

for(Map row : table) {
System.out.println("Column 'a' has value: " + row.get("a"));
}


} catch (IOException e) {

e.printStackTrace();
}





}

}
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please help