Java supports single inheritance only, i e. a class can only directly A package can be spill among several files A stack is a first in, first out structure A queue is a first in. first out structure An array whose elements are sorted is a sorted list An alias is when we have two variables referring to the same object Arrays of objects are supported by Java. The ArrayStringlog implementation provided in Chapter Two is an example of a hour implementation of a StringLog. When handling an exception explicitly, it is best to do so at the lowest level of abstract. It is usually better for a program to "bomb" then to produce erroneous results Java programmers can define their own exceptions. In Java, exceptions that are not handled explicitly in the program are thrown out to the The StackOverflow Exception is an unchecked exception In Java, an interface can extend another interface