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Lab 2/Lab 2.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 2/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 2/src/Main.java

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+/*
+Name: Diego Garcia, Erwin Pan
+Date: 9/2/2021
+Description: Postal Bar Code Printer
+*/
+import java.util.Scanner;
+class Main {
+  public static void main(String[] args) {
+    String zip = getZip(); // calls getZip and stores zip code within zip
+    printBarCode(zip); // prints the bar code of inputted zip code
+  }
+  /**
+  Takes input of the zip code and check if it's within the range[10000-99999].
+  @return zip returns zip code in string format.
+  */
+  public static String getZip(){ 
+    Scanner in = new Scanner(System.in); //creates scanner
+    System.out.print("Enter a zip code: "); // prompt
+    int zip = CheckInput.getIntRange(10000,99999); // checks for input in valid range
+    return String.valueOf(zip); // returns the zip in string format
+  }
+  /**
+  Calculates Check Digit.
+  @param zip zip code to be used to create the check digit.
+  @return checked returns character that corresponds to the integer of the check digit.
+  */
+  public static char getCheckDigit(String zip){
+    int sum = 0; // prime accumulator 
+    for (int i = 0; i < zip.length(); i++){
+      char charNum = zip.charAt(i); // obtain char at i
+      int num = Character.getNumericValue(charNum); // convert char to int and store in num
+      sum = sum + num; // add to accumulator
+    }
+    int rounded = (int)(Math.ceil((double)sum/10.0))*10; // converts sum to double, then back to int after rounding up to nearest 10
+    //int rounded = ((int)Math.ceil((double)sum/10))*10;
+    int checkInt = rounded - sum; // sub rounded from sum
+    char checkChar = (char)(48+checkInt); // convert checkInt to char with respect to ASCII
+    return checkChar; // return char to be used for bar code
+  }
+  /**
+  Prints out barcode given by the zip code.
+  @param zip zip code given by the user.
+  */
+  public static void printBarCode(String zip){
+    System.out.print("|"); //prints the start of the frame bar.
+    for (int i = 0; i < zip.length(); i++){
+      char d = zip.charAt(i); //store char at i position of zip. 
+      printDigit(d); // send char to printdigit to be printed
+    }
+    char checkDigit = getCheckDigit(zip); // generate check digit and store in char
+    printDigit(checkDigit); // print check digit
+    System.out.print("|"); //prints the end of the frame bar.
+  }
+    /**
+     * Prints the barcode corresponding to the given char.
+     * @param d the character that will be used to print the barcode.
+     */
+    public static void printDigit(char d){
+      if (d == '1'){
+        System.out.print("...||");
+      } else if (d == '2'){
+        System.out.print("..|.|");
+      } else if (d == '3'){
+        System.out.print("..||.");
+      } else if (d == '4'){
+        System.out.print(".|..|");
+      } else if (d == '5'){
+        System.out.print(".|.|.");
+      } else if (d == '6'){
+        System.out.print(".||..");
+      } else if (d == '7'){
+        System.out.print("|...|");
+      } else if (d == '8'){
+        System.out.print("|..|.");
+      } else if(d == '9'){
+        System.out.print("|.|..");
+      } else if (d == '0'){
+        System.out.print("||...");
+      }
+  }
+
+}