# Questions and Exercises: Characters and Strings

## Questions

• What is the initial capacity of the following string builder?
``````StringBuilder sb = new StringBuilder("Able was I ere I saw Elba.");
``````
• Consider the following string:
``````String hannah = "Did Hannah see bees? Hannah did.";
``````
• What is the value displayed by the expression `hannah.length()` ?

• What is the value returned by the method call `hannah.charAt(12)` ?

• Write an expression that refers to the letter `b` in the string referred to by `hannah` .

• How long is the string returned by the following expression? What is the string?

``````"Was it a car or a cat I saw?".substring(9, 12)
``````
• In the following program, called ComputeResult, what is the value of `result` after each numbered line executes?
``````public class ComputeResult {
public static void main(String[] args) {
String original = "software";
StringBuilder result = new StringBuilder("hi");
int index = original.indexOf('a');

/*1*/   result.setCharAt(0, original.charAt(0));
/*2*/   result.setCharAt(1, original.charAt(original.length()-1));
/*3*/   result.insert(1, original.charAt(4));
/*4*/   result.append(original.substring(1,4));
/*5*/   result.insert(3, (original.substring(index, index+2) + " "));

System.out.println(result);
}
}
``````

## Exercises

• Show two ways to concatenate the following two strings together to get the string `"Hi, mom."` :
``````String hi = "Hi, ";
String mom = "mom.";
``````
• Write a program that computes your initials from your full name and displays them.

• An anagram is a word or a phrase made by transposing the letters of another word or phrase; for example, "parliament" is an anagram of "partial men," and "software" is an anagram of "swear oft." Write a program that figures out whether one string is an anagram of another string. The program should ignore white space and punctuation.