Completed Exercises and Extension

Author: Jonas Finborud Nyman

src/main/java/com/booleanuk/core/Exercise.java

@@ -7,7 +7,7 @@ public class Exercise {
     // 1. The brokenUrl member above contains an invalid URL. There's a z instead of an s in the protocol (httpz instead of https).
     // Using the `replace` method on brokenUrl, set the fixedUrl member below to the correct value.
     // https://docs.oracle.com/en/java/javase/18/docs/api/java.base/java/lang/String.html#replace(char,char)
-    public String fixedUrl = "";
+    public String fixedUrl = brokenUrl.replaceFirst("z", "s");
 
 
     // Here's a documentation link for all string methods, use it to figure out how to complete the rest of these requirements:
@@ -16,26 +16,26 @@ public class Exercise {
 
     // 2. There are currently some upper case characters in the URL. Using an appropriate string method on the fixedUrl member above,
     // set the value of lowerCasedUrl.
-    public String lowerCasedUrl = "";
+    public String lowerCasedUrl = fixedUrl.toLowerCase();
 
 
     // 3. There is still white space on both ends of the URL! Use the appropriate string method to trim that white space
     // and set the value of the url member below
-    public String url = "";
+    public String url = lowerCasedUrl.strip();
 
 
     // 4. Using the appropriate string method on url, set the value of the protocol member below
-    public String protocol = "";
+    public String protocol = url.split(":")[0];
 
 
     // 5. Using the appropriate string method on url, set the value of the domain member below
-    public String domain = "";
+    public String domain = url.split("/")[2];
 
 
     // 6. Set the length member below to the length of the url member
-    public int length = 0;
+    public int length = url.length();
 
 
     // 7. Using concatenation and existing members, set the faqUrl member below to the faq page of the boolean website
-    public String faqUrl = "";
+    public String faqUrl = url.replace("who-we-are", "faq");
 }

src/main/java/com/booleanuk/extension/Extension.java

@@ -28,8 +28,7 @@ public StringBuilder one() {
 
         // 1. Using the sb variable above, add "Hello, world!" to the StringBuilder
         // WRITE YOUR CODE BETWEEN THIS LINE...
-
-
+        sb.append("Hello, world!");
 
         // ...AND THIS LINE
 
@@ -42,8 +41,8 @@ public StringBuilder two() {
         // 1. Using the sb variable above, add "Hello, world!" to the StringBuilder
         // 2. After adding the message, use an appropriate StringBuilder method to reverse it
         // WRITE YOUR CODE BETWEEN THIS LINE...
-
-
+        sb.append("Hello, world!");
+        sb.reverse();
 
         // ...AND THIS LINE
 
@@ -56,7 +55,8 @@ public StringBuilder three() {
         // 1. Using the sb variable above, add "Hello, world!" to the StringBuilder
         // 2. After adding the message, remove the comma.
         // WRITE YOUR CODE BETWEEN THIS LINE...
-
+        sb.append("Hello, world!");
+        sb.deleteCharAt(5);
 
 
         // ...AND THIS LINE
@@ -70,8 +70,8 @@ public StringBuilder four() {
         // 1. Using the sb variable above, add "Hello, world!" to the StringBuilder
         // 2. After adding the message, replace the word "world" with the word "Java"
         // WRITE YOUR CODE BETWEEN THIS LINE...
-
-
+        sb.append("Hello, world!");
+        sb.replace(7, 12, "Java");
 
         // ...AND THIS LINE