Chapter 9.3, Problem 9.15CP

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.
• The method “trim” denotes a built-in function that eliminates leading as well as trailing spaces in string.

Given code:

String str1 ="William ";

String str2 ="the";

String str3 ="Conqueror";

System.out.println(str1.trim() + str2.trim() +

str3. trim());

Explanation:

• The strings are been stored in variables “str1”, “str2” and “str3”.
• The strings are been trimmed using “trim()” method.
• The resultant strings are concatenated using “+” operator.
• The result of concatenation is been displayed.