I don't know what changes I've made lol

CS144-007-EXAMPLE/src/uwstout/courses/cs144/examples/CheckIfLetter.java

@@ -0,0 +1,25 @@
+package uwstout.courses.cs144.examples;
+
+import java.util.Scanner;
+
+public class CheckIfLetter {
+
+	public static void main(String[] args) {
+		Scanner scan = new Scanner(System.in);
+
+		String input = scan.nextLine();
+
+		char firstChar = input.charAt(0);
+
+		if ((firstChar >= 'a' && firstChar <= 'z') || (firstChar >= 'A' && firstChar <= 'Z')) {
+			System.out.printf("%s is a letter!", firstChar);
+		} else if (firstChar >= '0' && firstChar <= '9') {
+			System.out.printf("%s is a number!", firstChar);
+		} else {
+			System.out.printf("%s is of unknown type!", firstChar);
+		}
+
+		scan.close();
+	}
+
+}

CS144-007-EXAMPLE/src/uwstout/courses/cs144/examples/Distance.java

@@ -1,5 +1,6 @@
 package uwstout.courses.cs144.examples;
 
+import java.text.DecimalFormat;
 import java.util.Scanner;
 
 /**
@@ -30,6 +31,7 @@ public class Distance {
 	 */
 	public static void main(String[] args) {
 		Scanner scnr = new Scanner(System.in);
+		DecimalFormat df = new DecimalFormat("#,##0.00");
 
 		// Read in route name
 		System.out.print("Enter route name: ");
@@ -43,10 +45,14 @@ public class Distance {
 
 		// Calculate
 		/// Starting at 0,0 and going to the two stops in sequence
-		int distanceTraveled = ORIGIN_STOP.distanceTo(stop1) + stop1.distanceTo(stop2);
+		int blockDistanceTraveled = ORIGIN_STOP.getBlockDistance(stop1) + stop1.getBlockDistance(stop2);
+		double directDistanceTraveled = ORIGIN_STOP.getDistance(stop1) + stop1.getDistance(stop2);
 
 		// Output
-		System.out.printf("Total distance travelled (in city blocks) for route %s: %d\n", routeName, distanceTraveled);
+		System.out.println("Stop 1: " + stop1);
+		System.out.println("Stop 2: " + stop2);
+		System.out.printf("Total distance travelled (in city blocks) for route %s: %d\n", routeName, blockDistanceTraveled);
+		System.out.printf("The direct distance is: %s\n", df.format(directDistanceTraveled));
 
 		scnr.close();
 	}

CS144-007-EXAMPLE/src/uwstout/courses/cs144/examples/Formatter.java

@@ -0,0 +1,23 @@
+package uwstout.courses.cs144.examples;
+
+import java.text.DecimalFormat;
+import java.text.NumberFormat;
+import java.util.Scanner;
+
+public class Formatter {
+
+	public static void main(String[] args) {
+		Scanner scan = new Scanner(System.in);
+
+		System.out.print("Enter a value: ");
+		double val = scan.nextDouble();
+
+		System.out.println(val);
+		System.out.println(NumberFormat.getCurrencyInstance().format(val));
+		System.out.println(NumberFormat.getPercentInstance().format(val));
+		System.out.println(new DecimalFormat("#,##0.000,0").format(val));
+
+		scan.close();
+	}
+
+}

CS144-007-EXAMPLE/src/uwstout/courses/cs144/examples/SphereVolume.java

@@ -0,0 +1,33 @@
+package uwstout.courses.cs144.examples;
+
+import java.util.Scanner;
+
+public class SphereVolume {
+
+	/**
+	 * Calculates the volume of a sphere given the radius.
+	 * 
+	 * TESTS:
+	 * 
+	 * TEST1IN: 1; TEST1OUT: 4.189
+	 * 
+	 * TEST2IN: -2, TEST2OUT: -33.510
+	 * 
+	 * TEST3IN: 0, TEST3OUT: 0.000
+	 * 
+	 * TEST4IN: 0.5, TEST4OUT: 0.524
+	 * 
+	 * @param args Command line arguments - not used
+	 */
+	public static void main(String[] args) {
+		Scanner scan = new Scanner(System.in);
+		System.out.print("Enter the radius of the sphere: ");
+
+		double radius = Math.abs(scan.nextDouble());
+		double volume = (4.0 / 3.0) * Math.pow(radius, 3) * Math.PI;
+		System.out.printf("A sphere with radius %.2f has a volume of %.2f", radius, volume);
+
+		scan.close();
+	}
+
+}

CS144-007-EXAMPLE/src/uwstout/courses/cs144/examples/Stop.java

@@ -99,8 +99,12 @@ public class Stop {
 	 * @param otherStop The stop we are attempting to measure the distance to
 	 * @return The distance (in city blocks) between this object and otherPoint
 	 */
-	public int distanceTo(Stop otherStop) {
+	public int getBlockDistance(Stop otherStop) {
 		/// No Diagonals, city blocks
 		return Math.abs(otherStop.getX() - this.x) + Math.abs(otherStop.getY() - this.y);
 	}
+
+	public double getDistance(Stop otherStop) {
+		return Math.sqrt(Math.pow(otherStop.getX() - this.x, 2) + Math.pow(otherStop.getY() - this.y, 2));
+	}
 }

CS144-007-EXAMPLE/src/uwstout/courses/cs144/examples/StringSplit.java

@@ -0,0 +1,22 @@
+package uwstout.courses.cs144.examples;
+
+import java.util.Scanner;
+
+public class StringSplit {
+
+	public static void main(String[] args) {
+		Scanner scan = new Scanner(System.in);
+		String inputString = scan.nextLine().toLowerCase().strip();
+
+		int splitAt = inputString.length() / 2;
+
+		String stringHalf1 = inputString.substring(0, splitAt);
+		String stringHalf2 = inputString.substring(splitAt, inputString.length());
+
+		System.out.println(stringHalf1);
+		System.out.println(stringHalf2);
+
+		scan.close();
+	}
+
+}