Valid Java code, showing no access limits to encompassed classes

EncompassingClass.java

/**
 * 
 */
package tPrivateProtected;

/**
 * @author hilton
 *
 */
public class EncompassingClass {
	static class PrivateClass {
		private int privateMember = 0;
		private PrivateClass() {
			privateMember = 1;
		}
		
		private int sum(ProtectedClass pdc) {
			return privateMember + pdc.protectedMember;
		}
	}

	static class ProtectedClass {
		protected int protectedMember = 0;
		protected ProtectedClass() {
			protectedMember = 1;
		}
		
		private int sum(PrivateClass pec) {
			return protectedMember + pec.privateMember;
		}
	}
	/**
	 * @param args
	 */
	public static void main(String[] args) {
		PrivateClass   pec = new PrivateClass();
		ProtectedClass pdc = new ProtectedClass();
		System.out.println("Private   member " + pec.privateMember);
		System.out.println("Protected member " + pdc.protectedMember + "\n");
		
		System.out.println("Private   sum: " + pec.sum(pdc));
		System.out.println("Protected sum: " + pdc.sum(pec));
	}

}