Chapter 5 Test - page 174

1 Show two ways to declare a one-dimensional array of 12 doubles.

2 Show how to initialize a one-dimensional array of integers with the values ​​1 to 5.

3 Write a program that uses an array to find the average of 10 double values. Use any 10 values ​​you want.

4 Change the section sort Try this 5-1 to sort an array of strings. Demonstrate that it works.

5 What is the difference between the indexOf( ) and lastIndexOf( ) String methods?

6 Since all strings are objects of type String, show how to call the length( ) and charAt( ) methods on this string literal: “I like Java”.

7 Expanding the Encode encoding class, modify it so that it uses a
eight character string as key.

8 Can bitwise operators be applied to double type?

9 Show how the following sequence can be rewritten using the operator ?.
if(x else y = 20;

10 In the following fragment, is & a bitwise or logical operator? Why?
boolean a, b;
// ...
if(a & b) ...

11 Is it an error to go beyond the end of an array? What about indexing an array with a negative value?

12 What is the unsigned right shift operator?

13 Rewrite the MinMax class shown earlier in this chapter so that it uses a for-each style for loop.

14 Can the for loops that perform sorting in the Bubble class shown in Try This 5-1 be converted to for-each style loops? If not, why not?

15 Can a String control a switch statement?