For faster sorting of letters, the United States Postal Service encourages compa
ID: 3673501 • Letter: F
Question
For faster sorting of letters, the United States Postal Service encourages companies that use large volumes of mail to use a bar code denoting the ZIP. These are full-height frame bars on each side. The five encoded digits are followed by a check digit, which is computed as follows: Add up all digits, and choose the check digit to make the sum a multiple of 10. For example, the sum of the digits in the ZIP code 95014 is 9, so the check digit is 1 to make the sum equal to 20. Each digit of the ZIP code, and the check digit, is encoded according to the following table: where 0 denotes a half bar and a 1 a full bar. Note that they represent all combinations of two full and three half bars. The digit can be computed easily from the bar code using the column weights 7, 4, 2, 1, 0. For example, 01100 is: 0.7 + 1.4 + 1.2 + 0.1 + 0.0 = 6 The only expression is 0, which would yield 11 according to the weights formula. Write a program that asks the user for a ZIP code and prints the bar code. Use : for half bars, | for full bars. For example, 05014 becomes: (Alternatively, write a graphical application that draws real bars.) Your program should also be able to carry out the opposite conversion: translate bars into their ZIP code, reporting any errors in the input format or a mismatch of the digits.Explanation / Answer
//Postal.java
import java.util.Scanner;
public class Postal
{
public int num2; // 10000 digit
public int num3; // 1000 digit
public int num4; // 100 digit
public int num5; // 10 digit
public int num6; // 1 digit
public int checkDig; // check digit
public static int num;
public static String temp;
public static int menu;
public static int zip;
public static String bar0;
public static String bar1;
public static String bar2;
public static String bar3;
public static String bar4;
public static String bar5;
public static String bar6;
public static String bar7;
public static String bar8;
public static String bar9;
public static String str;
public static int numb;
public Postal()
{
zip = 0;
bar0 = "||:::"; bar1 = ":::||"; bar2 = "::|:|";
bar3 = "::||:"; bar4 = ":|::|"; bar5 = ":|:|:";
bar6 = ":||::"; bar7 = "|:::|"; bar8 = "|::|:";
bar9 = "|:|::";
}
public static int getZIP()
{
System.out.println("Enter a ZIP code : ");
Scanner sc = new Scanner(System.in);
zip = sc.nextInt();
while((zip<01001)||(zip>99950))
{
System.out.println("**** ERROR ****");
System.out.println("The ZIP code must be between 01001 and 99950");
System.out.println("Please,enter the correct zip : ");
zip = sc.nextInt();
}
return zip;
}
public static int menu()
{
System.out.println("**** Zip & Bar Code Convertor ****");
System.out.println("Choose one option from following : ");
System.out.println("1) Create ZIP barcode ");
System.out.println("2) Find ZIP code from barcode ");
System.out.println("3) Exit ");
Scanner sc = new Scanner(System.in);
return sc.nextInt();
}
public void getDigit(int num)
{
num2 = num/10000;
num3 = ((num/1000)-num2*10);
num4 = (num/100 - (num2*100 + num3*10));
num5 = (num/10 -(num2*1000 + num3*100 + num4*10));
num6 = (num - (num2*10000 + num3*1000 + num4*100 + num5*10));
checkDig = 100- (num2+num3+num4+num5+num6);
System.out.println(checkDig);
while(checkDig>10)
{ checkDig -= 10; }
System.out.println("**** BARCODE ****");
System.out.print("|");
getBar(num2);
getBar(num3);
getBar(num4);
getBar(num5);
getBar(num6);
getBar(checkDig);
System.out.print("|");
}
public void getBar(int x)
{
switch(x)
{
case 0: System.out.print(bar0); break;
case 1: System.out.print(bar1); break;
case 2: System.out.print(bar2); break;
case 3: System.out.print(bar3); break;
case 4: System.out.print(bar4); break;
case 5: System.out.print(bar5); break;
case 6: System.out.print(bar6); break;
case 7: System.out.print(bar7); break;
case 8: System.out.print(bar8); break;
case 9: System.out.print(bar9); break;
}
}
public static String number()
{
System.out.println("Enter a barcode with using : or | ");
Scanner scn = new Scanner(System.in);
String bar = scn.nextLine();
return bar;
}
public static void getNumber(String temp)
{
System.out.println("");
System.out.println(temp);
if(temp.equals(bar0))
{
numb = 0;
}
if(temp.equals(bar1))
{
numb = 1;
}
if(temp.equals(bar2))
{
numb = 2;
}
if(temp.equals(bar3))
{
numb = 3;
}
if(temp.equals(bar4))
{
numb = 4;
}
if(temp.equals(bar5))
{
numb = 5;
}
if(temp.equals(bar6))
{
numb = 6;
}
if(temp.equals(bar7))
{
numb = 7;
}
if(temp.equals(bar8))
{
numb = 8;
}
if(temp.equals(bar9))
{
numb = 9;
}
System.out.print(numb);
}
public static void divide(String temp)
{
Postal po = new Postal();
str = temp.substring(1,6);
po.getNumber(str);
str = temp.substring(6,11);
po.getNumber(str);
str = temp.substring(11,16);
po.getNumber(str);
str = temp.substring(16,21);
po.getNumber(str);
str = temp.substring(21,26);
po.getNumber(str);
}
public static void main(String[] args)
{
Postal pos = new Postal();
while(menu != 3)
{
System.out.println();
menu = pos.menu();
switch (menu)
{
case 1:
num = pos.getZIP();
pos.getDigit(num);
System.out.println();
break;
case 2:
temp = pos.number();
System.out.println(temp);
pos.divide(temp);
break;
case 3:
break;
}
}
}
}
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