Name: ksC84122 Date: 02/26/99


JDK 1.2.2 java.lang.SecurityManager.checkAccess(Thread t) throws NullPointerException
if t==null, while java.lang.SecurityManager.checkAccess(ThreadGroup g) just returns silently
if g==null. This behavior is inconsistent and it is not specified in the javadoc what is
the right behavior for these methods in case of null parameter.

A test example which demonstrates this problem.
===== test35.java ========
public class test35 {

    public static void main (String argv[]) {
        ThreadGroup tg = null;
        Thread t = null;
        SecurityManager sm = new SecurityManager();
        
        try {
            sm.checkAccess(t);
            System.out.println("checkAccess(Thread) returns silently");
        } catch (NullPointerException npe) {
            System.out.println("checkAccess(Thread) throws NullPointerException");
        }

        try {
            sm.checkAccess(tg);
            System.out.println("checkAccess(ThreadGroup) returns silently");
        } catch (NullPointerException npe) {
            System.out.println("checkAccess(ThreadGroup) throws NullPointerException");
        }
        return;
    }

}


========= Sample run (JDK1.2.2) ==========
#>java test35
checkAccess(Thread) throws NullPointerException
checkAccess(ThreadGroup) returns silently

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