10

CHAPTER

we showed a diagram of Java data types (repeated on the
next page as Figure 10.1). Java data types are classified into primitive and
reference types. Recall that in Java, a variable of a primitive type holds an
actual value of that type, whereas a variable of a reference type holds
the address of an object. In previous chapters, we have covered all of the
primitive types and the class type. In this chapter, we extend the dis-
cussion of the Java data types by examining the array type. Before doing
so, we first step back and look at data types from a general perspective,
rather than a Java perspective.

In Chapter 3,

1978

Epson introduces

the first successful

dot matrix printer,

the TX-80

1978

The VAX 11/780

and the VMS

operating system

developed at DEC

popularize the 32-

bit architecture

1978

The WordStar

program for word

processing debuts

1978

Ron Rivest, Adi

Shamir, and

Leonard Adleman

introduce RSA, a

strong encryption

algorithm for

public-key

cryptosystems

1979

Dan Bricklin and

Bob Frankston

develop VisiCalc,

the first electronic

spreadsheet

1979

Motorola introduces

the 32-bit 68000

chip, which is later

used for the

Macintosh

computer