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Lab 1/Lab 1.iml

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+<?xml version="1.0" encoding="UTF-8"?>
+<module type="JAVA_MODULE" version="4">
+  <component name="NewModuleRootManager" inherit-compiler-output="true">
+    <exclude-output />
+    <content url="file://$MODULE_DIR$">
+      <sourceFolder url="file://$MODULE_DIR$/src" isTestSource="false" />
+    </content>
+    <orderEntry type="inheritedJdk" />
+    <orderEntry type="sourceFolder" forTests="false" />
+  </component>
+</module>

Lab 1/src/CheckInput.java

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+import java.util.Scanner;
+
+/** 
+ * Static functions used to check console input for validity.
+ *
+ * Use:	Place CheckInput class in the same project folder as your code.
+ *	Call CheckInput functions from your code using "CheckInput."
+ *
+ * Example:  int num = CheckInput.getInt();
+ *
+ * @author Shannon Cleary 2020
+ */
+public class CheckInput {
+
+	/**
+	 * Checks if the inputted value is an integer.
+	 * @return the valid input.
+	 */
+	public static int getInt() {
+		Scanner in = new Scanner( System.in );
+		int input = 0;
+		boolean valid = false;
+		while( !valid ) {
+			if( in.hasNextInt() ) {
+				input = in.nextInt();
+				valid = true;
+			} else {
+				in.next(); //clear invalid string
+				System.out.println( "Invalid Input." );
+			}
+		}
+		return input;
+	}
+
+	/**
+	 * Checks if the inputted value is an integer and 
+	 * within the specified range (ex: 1-10)
+	 * @param low lower bound of the range.
+	 * @param high upper bound of the range.
+	 * @return the valid input.
+	 */
+	public static int getIntRange( int low, int high ) {
+		Scanner in = new Scanner( System.in );
+		int input = 0;
+		boolean valid = false;
+		while( !valid ) {
+			if( in.hasNextInt() ) {
+				input = in.nextInt();
+				if( input <= high && input >= low ) {
+					valid = true;
+				} else {
+					System.out.println( "Invalid Range." );
+				}
+			} else {
+				in.next(); //clear invalid string
+				System.out.println( "Invalid Input." );
+			}
+		}
+		return input;
+	}
+	/**
+	 * Checks if the inputted value is a non-negative integer.
+	 * @return the valid input.
+	 */
+	public static int getPositiveInt( ) {
+		Scanner in = new Scanner( System.in );
+		int input = 0;
+		boolean valid = false;
+		while( !valid ) {
+			if( in.hasNextInt() ) {
+				input = in.nextInt();
+				if( input >= 0 ) {
+					valid = true;
+				} else {
+					System.out.println( "Invalid Range." );
+				}
+			} else {
+				in.next(); //clear invalid string
+				System.out.println( "Invalid Input." );
+			}
+		}
+		return input;
+	}
+
+	/**
+	 * Checks if the inputted value is a double.
+	 * @return the valid input.
+	 */
+	public static double getDouble() {
+		Scanner in = new Scanner( System.in );
+		double input = 0;
+		boolean valid = false;
+		while( !valid ) {
+			if( in.hasNextDouble() ) {
+				input = in.nextDouble();
+				valid = true;
+			} else {
+				in.next(); //clear invalid string
+				System.out.println( "Invalid Input." );
+			}
+		}
+		return input;
+	}
+
+	/**
+	 * Takes in a string from the user.
+	 * @return the inputted String.
+	 */
+	public static String getString() {
+		Scanner in = new Scanner( System.in );
+		String input = in.nextLine();
+		return input;
+	}
+
+	/**
+	 * Takes in a yes/no from the user.
+	 * @return true if yes, false if no.
+	 */
+	public static boolean getYesNo(){
+		boolean valid = false;
+		while( !valid ) {
+			String s = getString();
+			if( s.equalsIgnoreCase("yes") || s.equalsIgnoreCase("y") ) {
+				return true;
+			} else if( s.equalsIgnoreCase("no") || s.equalsIgnoreCase("n") ) {
+				return false;
+			} else {
+				System.out.println( "Invalid Input." );
+			}
+		}
+		return false;
+	}	
+}

Lab 1/src/Main.java

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+import java.util.Random;
+
+class Main {
+  public static void main(String[] args) {
+
+    // initializing variables
+    Random random = new Random();
+
+    // random number between 0 - 100
+    int randomNumber = random.nextInt(101);
+
+    int maxRange = 100;
+    int guess = 0;
+    int minRange = 0;
+    int count = 0;
+
+    // initialize boolean guess
+    Boolean notGuessed = true;
+
+    // prompt the user to enter a number
+    System.out.print("I’m thinking of a number. Guess a value (1-100): ");
+
+    while (notGuessed){
+      // check if input is valid
+      guess = CheckInput.getIntRange(minRange, maxRange);
+
+      // increment counter
+      count ++;
+
+      // check if guess is correct
+      if (guess == randomNumber){
+        notGuessed = false;
+      }
+
+      // if the guess is not correct, tell the user
+      else{
+        String message = "";
+        // if guess is too high, store message
+        if (guess > randomNumber){
+          message = "Too High.";
+        //else if guess is too low, store message
+        } else{
+          message = "Too Low. ";
+        }
+        // prompt the user to ask again
+        System.out.print(message + " Guess again: ");
+      }
+    }
+    // tell the user they guessed the number correct
+    System.out.println("Correct!  You got it in " + count + " tries.");
+  }
+}