链接DB2错哪了

链接DB2哪里错了
import java.sql.Connection;
import java.sql.DriverManager;

public class DBManage 
{
public Connection getConnection()
{
Class.forName("com.ibm.db2.jcc.DB2Driver ").newInstance();
String url="jdbc:db2://111.22.33.44:50000/GREG";
String user="db2admin";
String password="XXXXX";
Connection conn= DriverManager.getConnection(url,user,password);
return conn;
}
}

报错：DriverManager 无法识别！

------解决方案--------------------
Class.forName("com.ibm.db2.jcc.DB2Driver ").newInstance();
好像多了个空格