Big Java Late Objects
2nd Edition
ISBN: 9781119330455
Author: Horstmann
Publisher: WILEY
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Chapter 5, Problem 7PE
Explanation of Solution
Method for returning count of all words in a string
public static int count_words (String str)
{
//declare variable state
int state = OUT;
//declare variable wc
int wc = 0;
//declare variable i
int i = 0;
//while loop executes
while(i<str.length())
{
//if condition
if(str.charAt(i) == '' || str.charAt(i) == '\n' || str.charAt(i) == '\t')
state = OUT;
//elseif condition
elseif (state==OUT)
{
...
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Write a method that accepts a String as an argument and returns an int array. Assume that the string contains a series of single digit numbers separated by a comma. (e.g. 2,3,4,5). The method should return an array with the smallest element in the string.
Hint: To convert a character to a string use the static toString method in the Character class.
Implement a new concat method in the String class you worked on for HW2. The method should return a new String object that represents the text you would end up with if the argument String were "added onto the end of" this String. For example, in the code below, the String object answer should represent the text "bookstore" and true should be printed the screen.
char[] bookA = {'b', 'o', 'o', 'k'};
char[] storeA = {'s', 't', 'o', 'r', 'e'};
char[] bookstoreA = {'b', 'o', 'o', 'k', 's', 't', 'o', 'r', 'e'};
String book = new String(bookA);
String store = new String(storeA);
String bookstore = new String(bookstoreA);
String answer = book.concat(store);
System.out.println(answer.equals(bookstore));
In the text area below, type in your definition of the concat method. (In other words, type in the code that should replace the //TODO comment.) Your code cannot call any methods.
public class String {
private char[] data;
public String(char[] value) {
data = new…
Write a method that takes a String and a character as inputs and returns the number of instances of the input character within the input String.
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Chapter 5 Solutions
Big Java Late Objects
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