String class: The “String” class provides a number of methods that examines for a string inside of a string. The term “substring” refers to a string that denotes another string’s part. The “startsWith” method would determine whether calling string of object begins with a specific substring. The method returns “true” if string begins with specified substring, it returns “false” otherwise. The “endsWith” method would determine whether calling string would end with a specified substring. The method returns “true” if string ends with specified substring, it returns “false” otherwise. The “regionMatches” method would determine whether specified regions for two strings match. The first argument of this method can be “true” or “false” that indicates whether a case-insensitive comparison could be performed. StringBuilder class: The “StringBuilder” class is same as “String” class except that contents of “StringBuilder” objects could be changed. It provides several methods that “String” class does not have. The “append” method accepts an argument that might be a primitive data type. It appends a string representation to contents of calling object. The “insert” method accepts two arguments, an integer that specifies position in string of calling object as well as value to be inserted. The “replace” method replaces the occurrences of one character with another character. The “toString” method converts a “StringBuilder” object in to a regular string.

Question

Want to see the full answer?

Answer 1

Question

Chapter 9.4, Problem 9.20CP

Program Plan Intro

String class:

The “String” class provides a number of methods that examines for a string inside of a string.

The term “substring” refers to a string that denotes another string’s part.

The “startsWith” method would determine whether calling string of object begins with a specific substring.

The method returns “true” if string begins with specified substring, it returns “false” otherwise.

The “endsWith” method would determine whether calling string would end with a specified substring.

The method returns “true” if string ends with specified substring, it returns “false” otherwise.

The “regionMatches” method would determine whether specified regions for two strings match.

The first argument of this method can be “true” or “false” that indicates whether a case-insensitive comparison could be performed.

StringBuilder class:

The “StringBuilder” class is same as “String” class except that contents of “StringBuilder” objects could be changed.

It provides several methods that “String” class does not have.

The “append” method accepts an argument that might be a primitive data type.

It appends a string representation to contents of calling object.

The “insert” method accepts two arguments, an integer that specifies position in string of calling object as well as value to be inserted.

The “replace” method replaces the occurrences of one character with another character.

The “toString” method converts a “StringBuilder” object in to a regular string.

Expert Solution & Answer

Want to see the full answer?

Check out a sample textbook solution

See solution

Students have asked these similar questions

Q4: Consider the following MAILORDER relational schema describing the data for a mail order company. (Choose five only). PARTS(Pno, Pname, Qoh, Price, Olevel) CUSTOMERS(Cno, Cname, Street, Zip, Phone) EMPLOYEES(Eno, Ename, Zip, Hdate) ZIP CODES(Zip, City) ORDERS(Ono, Cno, Eno, Received, Shipped) ODETAILS(Ono, Pno, Qty) (10 Marks) I want a detailed explanation to understand the mechanism how it is Qoh stands for quantity on hand: the other attribute names are self-explanatory. Specify and execute the following queries using the RA interpreter on the MAILORDER database schema. a. Retrieve the names of parts that cost less than $20.00. b. Retrieve the names and cities of employees who have taken orders for parts costing more than $50.00. c. Retrieve the pairs of customer number values of customers who live in the same ZIP Code. d. Retrieve the names of customers who have ordered parts from employees living in Wichita. e. Retrieve the names of customers who have ordered parts costing less…

Q4: Consider the following MAILORDER relational schema describing the data for a mail order company. (Choose five only). (10 Marks) PARTS(Pno, Pname, Qoh, Price, Olevel) CUSTOMERS(Cno, Cname, Street, Zip, Phone) EMPLOYEES(Eno, Ename, Zip, Hdate) ZIP CODES(Zip, City) ORDERS(Ono, Cno, Eno, Received, Shipped) ODETAILS(Ono, Pno, Qty) Qoh stands for quantity on hand: the other attribute names are self-explanatory. Specify and execute the following queries using the RA interpreter on the MAILORDER database schema. a. Retrieve the names of parts that cost less than $20.00. b. Retrieve the names and cities of employees who have taken orders for parts costing more than $50.00. c. Retrieve the pairs of customer number values of customers who live in the same ZIP Code. d. Retrieve the names of customers who have ordered parts from employees living in Wichita. e. Retrieve the names of customers who have ordered parts costing less than$20.00. f. Retrieve the names of customers who have not placed…

ut da Q4: Consider the LIBRARY relational database schema shown in Figure below a. Edit Author_name to new variable name where previous surname was 'Al - Wazny'. Update book_Authors set Author_name = 'alsaadi' where Author_name = 'Al - Wazny' b. Change data type of Phone to string instead of numbers. عرفنه شنو الحل BOOK Book id Title Publisher_name BOOK AUTHORS Book id Author_name PUBLISHER Name Address Phone e u al b are rage c. Add two Publishers Company existed in UK. insert into publisher(name, address, phone) value('ali','uk',78547889), ('karrar', 'uk', 78547889) d. Remove all books author when author name contains second character 'D' and ending by character 'i'. es inf rmar nce 1 tic عرفته شنو الحل e. Add one book as variables data? عرفته شنو الحل