Add Problem1 Solution and Practice Strings

Author: Singh, Shubham

.idea/workspace.xml

@@ -1,4 +1,4 @@
-# UdemyProblems from the Udemy course: Java Puzzles to Eliminate Code Fear
+# Udemy Problems from the Udemy course: Java Puzzles to Eliminate Code Fear
 
 This project covers problems given in the course: Java Puzzles to Eliminate Code Fear
 

udemyproblems/README.md

@@ -0,0 +1,18 @@
+public class PracticeStrings {
+
+  public static void main(String[] args) {
+    String s = "Happy";
+    System.out.println(s.charAt(1));
+
+    if(s.equalsIgnoreCase("happy")) {
+      System.out.println("Happy match happy");
+    }
+
+    s="Today Happy looks Happy.";
+    System.out.println(s.indexOf("Happy"));
+    System.out.println(s.indexOf("Happy", 0));
+    System.out.println(s.indexOf("Happy", 7));
+
+    System.out.println(s.lastIndexOf("Happy"));
+  }
+}

udemyproblems/src/main/java/PracticeStrings.java

@@ -1,7 +1,8 @@
 public class Problem1 {
 
 	/**
-	Given a string of odd length, return the middle 3 characters from the string, 
+	Problem Category: Easy
+ 	Given a string of odd length, return the middle 3 characters from the string,
 	so the string <b>"Monitor"</b> yields <b>"nit"</b>. 
 	If the string length is less than 3, return the string as is. <br> <br>
 
@@ -13,6 +14,13 @@ public class Problem1 {
 
 	public static String middleThree(String str) {
 		String result = str;
+
+		if(str.length()>=3) {
+			int mid = str.length()/2;
+			result = str.substring(mid-1, mid+2);
+			return result;
+		}
+
 		return result;
 	}
 
@@ -21,6 +29,11 @@ public static void main(String args[]){
 		Problem1Test.runTests();
 	}
 
+	/**
+	 * In below inner class are the test fixtures setup to test various
+	 * test cases, the objective of above problem's solution is to make
+	 * these test cases PASS.
+	 * */
 	public static class Problem1Test {
 		public static void runTests(){
 
@@ -30,14 +43,14 @@ public static void runTests(){
 			for(int i=0; i < params1.length; i++){
 				String result = middleThree(params1[i]);
 				if(result.equals(expected[i])) {
-					System.out.println(printPassResult(params1[i], expected[i], result));
+					System.out.println(printPassResult(params1[i], result));
 				} else{
 					System.out.println(printFailResult(params1[i], expected[i], result));
 				}
 			}
 		}
 
-		private static String printPassResult(Object params1, Object expected, Object result){
+		private static String printPassResult(Object params1, Object result){
 			return "PASS: middleThree("+ params1.toString()+ ") -> " + result.toString();
 		}