Java Project Name: IC06_ValidDate

Write a Java console application that reads a string from the keyboard and tests whether it contains a valid date. Display the date and a message that indicates whether it is valid. If it is not valid, also display a message explaining why it is NOT valid.

The input date will have the format mm/dd/yyyy. A valid month value mm must be from 1 to 12 (January is 1). You can use:

String monthPart = inputDate.substring(0, 2); int month = Integer.parseInt(monthPart); to get the month value.

A valid day value dd must be from 1 to a value that is appropriate for the given month. September, April, June, and November each have 30 days. Assume February has 28 days. All other months have 31 days. The year can be any 4 digit year.

***Be sure to use a switch statement at least once (perhaps for checking the valid months)***

i got my code I just don't know why it isn working can anybody help me

import java.util.Scanner;

public class ValidDate {

public static void main(String[] args) {

Scanner consoleScanner = new Scanner(System.in);

boolean validDate;

// set the date true

validDate = true;

boolean invalidDate;

// set the date to false;

invalidDate = false;

String InputDate = null;

String monthPart = InputDate.substring(0, 2);

int month = Integer.parseInt(monthPart);

String dayPart = InputDate.substring(3,5);

int day = Integer.parseInt(dayPart);

String yearPart = InputDate.substring(6,10);

int year = Integer.parseInt(yearPart);

// now do the input

System.out.println("Enter a Date (mm/dd/yyyy): ");

//Get input & use a delimiter. Delimiter means if you want a symbol to come out in the output and work

consoleScanner.useDelimiter("[/ ]");

month = consoleScanner.nextInt();

day = consoleScanner.nextInt();

year = consoleScanner.nextInt();

if((month >= 1 && month <= 12) && (day >= 1 && day <= 31))

{

//For months with 30 days

if((month == 4 || month == 6 || month == 9 || month == 11) && (day <= 30))

{

validDate = true;

}

//For months with 31 days

if((month == 1 || month == 2 || month == 3 || month == 5 || month == 7 || month == 8 || month == 10 || month == 12) && (day <= 31))

{

validDate = true;

}

// for invalid date

else if((month < 1 && month > 12) && (day < 1 && day >31))

{

invalidDate = false;

}

//For months with 30 days

else if((month == 1 || month == 2 || month == 3 || month == 5 || month == 7 || month == 8 || month == 10 || month >=12) && (day <= 30))

{

invalidDate = false;

}

//For months with 31 days

else if((month == 4 || month == 6 || month == 9 || month == 11 || month >=12) && (day <= 31))

{

invalidDate = false;

}

//If the date is valid

if(validDate == true)

{

System.out.println(month + "/" + day + "/" + year + " is a valid date.");

}

else

{

System.out.println(invalidDate + "Invalid date!");

}

}

}

}