Path to trust store - set property doesn't work?

I've set up a self-signed certificate to test an SSL Java connection. However, it is refusing to locate the Java trust store. I've saved copies of it in /Java/jre6/lib/security in addition to the folder where the classes are compiled to (I'm using NetBeans) and also to /java/jre6/bin. None of the above appears to work, because when I run the following, trustStore == null.

public class ShowTrustStore {

    public static void main(String[] args) {
        System.setProperty("javax.net.ssl.keyStore", "keystore.jks");
        System.setProperty("javax.net.ssl.trustStrore", "cacerts.jks");
        System.setProperty("javax.net.ssl.keyStorePassword", "changeit");

        String trustStore = System.getProperty("javax.net.ssl.trustStore");
        if (trustStore == null) {
            System.out.println("javax.net.ssl.trustStore is not defined");
        } else {
            System.out.println("javax.net.ssl.trustStore = " + trustStore);
        }
    }
}

How to set the path correctly?

Using the getFile() method and some more debug data:

package ssltest;

public class Main {

    public static void main(String[] args) {

//        System.setProperty("javax.net.ssl.keyStore", "/keystore.jks");
//        System.setProperty("javax.net.ssl.trustStrore", "/java.home/cacerts.jks");
//        System.setProperty("javax.net.ssl.keyStorePassword", "changeit");
//        System.setProperty("javax.net.ssl.trustStorePassword", "changeit");

        try {
            Main.class.getResource("trustStore.jks").getFile();
        } catch (Exception e) {
            e.printStackTrace();
        }

        String trustStore = System.getProperty("javax.net.ssl.trust