OBJECT-ORIENTED THINKING - Introduction to Java Programming: Comprehensive Version - page 398

c. s1.insert( 2 , "is fun" );
d . s1.insert( 1 , s2);
e . s1.charAt( 2 );
f . s1.length();
g . s1.deleteCharAt( 3 );
h . s1.delete( 1 , 3 );
i . s1.reverse();
j. s1.replace( 1 , 3 , "Computer" );
k. s1.substring( 1 , 3 );
l. s1.substring( 2 );

10.32

Show the output of the following program:

public class Test {
public static void main(String[] args) {
String s = "Java" ;
StringBuilder builder = new StringBuilder(s);
change(s, builder);

System.out.println(s);
System.out.println(builder);
}

private static void change(String s, StringBuilder builder) {
s = s + " and HTML" ;
builder.append( " and HTML" );
}
}

K EY T ERMS

abstract data type (ADT) 366 composition 374

has-a relationship aggregation 374 374

boxing 383
class abstraction 366
class encapsulation

multiplicity 373

stack 378
unboxing 366 383

class's contract 366

C HAPTER S UMMARY
1.

The procedural paradigm focuses on designing methods. The object-oriented paradigm
couples data and methods together into objects. Software design using the object-
oriented paradigm focuses on objects and operations on objects. The object-oriented
approach combines the power of the procedural paradigm with an added dimension that
integrates data with operations into objects.

2.

Many Java methods require the use of objects as arguments. Java offers a convenient
way to incorporate, or wrap, a primitive data type into an object (e.g., wrapping int into
the Integer class, and wrapping double into the Double class).