What does the following codes do?

[phpuser123]

import java.lang.*;
public class java17_test extends SecurityManager {

/**
* @param args
*/
public static void main(String[] args) {


System.setSecur ityManager(new securityHouse() );
System.exit(1);

}

}


class securityHouse extends SecurityManager {
public void house(){
checkExit(1);

}
}


I expected to get a SecurityExcepti on as soona as I invoked the System.exit(1) method but I failed to get one..
Is my logic right and are my codes meaningful?