Objective Use String class methods to identify parts of text Background reading

Question

Objective Use String class methods to identify parts of text Background reading ZyBooks 3.5 - 3.8 Assignment You are to write a Java application that Creates an ID from two words. The ID has the form: LastHalfOfWord1 + LengthOfWord2 + UppercaseFirstLetterOfWord2 For example, if the two words are george and Washington, the ID will be rge10W Extracts a file extension from a file path. For example, if the file path is/some/path/to/file/myfile.java, the program would print: The file extension is ".java".

Explanation / Answer

// JavaApplication.java

import java.util.Scanner;

public class JavaApplication
{
   // Part2
   public static String getExtension(String filePath, char extensionSeparator)
   {
   int sep = filePath.lastIndexOf(extensionSeparator);
   return filePath.substring(sep + 1);
   }

public static void main(String[] args)
{
   // Part1
   Scanner sc=new Scanner(System.in);

   System.out.print("Enter word1: ");
   String word1 = sc.next();
   System.out.print("Enter word2: ");
   String word2 = sc.next();

   String ID = word1.substring(word1.length()/2);
   int l = word2.length();
   ID = ID.concat(Integer.toString(l));
   word2 = word2.toUpperCase();  
   char c = word2.charAt(0);

   ID = ID.concat(Character.toString(c));

   System.out.println("ID: " + ID);

   // Part2
   String filePath = "/home/ubuntu/index.html";
   System.out.println(" PATH: " + filePath);
   System.out.println("Extension = " + getExtension(filePath, '.'));
}
}

/*
output:

Enter word1: george
Enter word2: washington
ID: rge10W

PATH: /home/ubuntu/index.html
Extension = html

*/

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