在eclipse中运行32位jvm和64位jvm

Question

I am trying to create a connection to a 32 bit Microsoft access 2010 database using Java and 64 bit eclipse eclipse in windows 7.

I created a 32 bit system dns by reading this link . The program to create the 32 bit dns is located at:

c:\windows\sysWOW64\odbcad32.exe  

In an attempt to configure eclipse to run the java class as 32-bit, I selected Run as... Run Configurations --> (Arguments tab) and entered -d32 in the VM Arguments box, then clicked run. However, trying to run the program resulted in a dialog box saying:

"Could not create the java virtual machine"  

Here is the code for the class I am using to test a connection to the system dns:

public class SoftwareDeveloper {
    public static void main(String[] args){ 
        try {
            Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
            Connection conn = DriverManager.getConnection("jdbc:odbc:MYDSNCONNECTION");
            Statement st = conn.createStatement();
            ResultSet rest = st.executeQuery("SELECT * FROM myTable");
            while(rest.next()){
                System.out.println(rest.getString(1));
                System.out.println(rest.getString(2));
            }
        }
        catch (ClassNotFoundException cnfe){cnfe.printStackTrace();}
        catch (SQLException e) {e.printStackTrace();}
    }
}

I am guessing this means I created a 32 bit system dns successfully, but that eclipse is not able to find a 32 bit jdk. I want to keep using 64 bit jdk with eclipse, but is there some way to configure eclipse so that it can switch from a default 64 bit jdk to a 32 bit jdk when -d32 is given in the run configurations? Or is there another solution?

NOTE: Installing 64 bit version of MS Access or deleting Access and downloading an Access database engine from Microsoft are not options for unrelated reasons.

Answer 1

Download and install a 32-bit JRE (or JDK) on your system.

Find your Launch Configuration (Run As-> Run Configurations...) under Java Application branch.

Go to the JRE tab and select Alternate JRE. Click on Installed JREs... button, add your 32-bit JRE and select it.