INTRODUCTION TO OBJECTS AND INPUT/OUTPUT - Java Programming: From Problem Analysis to Program Design - page 168

8. Consider the following statements:
String str = "Going to the amusement park";
char ch;
int len;
int position;
a. What value is stored in ch by the following statement?
ch = str.charAt(0);
b. What value is stored in ch by the following statement?
ch = str.charAt(10);
c. What value is stored in len by the following statement?
len = str.length();
d. What value is stored in position by the following statement?
position = str.indexOf('t');
e. What value is stored in position by the following statement?
position = str.indexOf("park");
9. Assume the declaration in Exercise 8. What is the output of the following
statements?

System.out.println(str.substring(0, 5));

a.

System.out.println(str.substring(13, 22));

b.

System.out.println(str.toUpperCase()); c.

System.out.println(str.toLowerCase());

d.

System.out.println(str.replace('t', '*')); e.

Suppose that you have the following statements:
String str;
str = "Java programming: from problem analysis to program design";
What is the value of the following expressions?

10.

str.indexOf("analysis")

a.

str.substring(5, 16) b.

str.startsWith("Java")

c.

str.startsWith("J") d.

str.endsWith(".")

e.

Suppose that you have the following statements:
String str;
String str1 = "programming";
str = "Java programming: from problem analysis to program design";
What is the value of the following expressions?

11.