Prentice.Hall.Introduction.to.Java.Programming,.Brief.Version.9th.(2014).[sharethefiles.com]

second program passes an unspecified number of integers delimited by one space
in a string to the main method and displays their total. Name the two programs
Exercise9_14a and Exercise9_14b, as shown in Figure 9.15.
Programming Exercises 365
FIGURE 9.15
The program adds all the numbers passed from the command line.
*9.15 (Find the number of uppercase letters in a string) Write a program that passes a
string to the main method and displays the number of uppercase letters in the string.
Comprehensive
**9.16 (Implement the String class) The String class is provided in the Java library.
Provide your own implementation for the following methods (name the new class
MyString1):
public MyString1(char[] chars);
public char charAt(int index);
public int length();
public MyString1 substring(int begin, int end);
public MyString1 toLowerCase();
public boolean equals(MyString1 s);
public static MyString1 valueOf(int i);
**9.17 (Guess the capitals) Write a program that repeatedly prompts the user to enter a
capital for a state. Upon receiving the user input, the program reports whether the
answer is correct. Assume that 50 states and their capitals are stored in a twodimensional
array, as shown in Figure 9.16. The program prompts the user to
answer all states’ capitals and displays the total correct count. The user’s answer is
not case-sensitive.
Alabama
Montgomery
Alaska
Juneau
Arizona
Phoenix
... ...
... ...
FIGURE 9.16
A two-dimensional array stores states and their capitals.
Here is a sample run:
What is the capital of Alabama? Montogomery
The correct answer should be Montgomery
What is the capital of Alaska? Juneau
Your answer is correct
What is the capital of Arizona? ...
...
The correct count is 35