Write a program with the following requirements: 1. ask the user to enter an integer. Then display what the user entered back on the screen if the user entered an integer ("you entered ..."). If the user enter something other than an integer then display on the screen a message that says "you did not enter an integer". 2. next, the program asks …

ExceptionHandling.java

import java.io.*;
import java.text.SimpleDateFormat;
import java.util.*;
import java.lang.SecurityException;

public class ExceptionHandling{
	private Scanner input;
	
	public ExceptionHandling(){
		input = new Scanner(System.in); //so we can take in the users input
		input.useDelimiter(System.getProperty("line.separator"));
		try{
			getInt();
			getString();
		}
		catch(MyNumberException mne){
			System.err.println(mne.getMessage("You did not enter an integer.")); //apparently the user can't follow directions
			writeToLog("You did not enter an integer."); //outputting to log file
		}
	}
	
	public void writeToLog(String message){
		Formatter output;
		try{
			output = new Formatter(new BufferedWriter(new FileWriter("ExceptionHandlingLog.txt",true)));
			String timeStamp = new SimpleDateFormat("yyyyMMDD_HHmmss").format(Calendar.getInstance().getTime());
			output.format("%s - %s\n", timeStamp, message);
			output.close();
		}
		catch(FileNotFoundException fnf){
			System.err.println("Error opening or creating file.");
			System.exit(1);
		}
		catch(Exception e){
			System.err.println("Error with file I/O.");
			System.out.println(e.getStackTrace());
		}
	}
	
	public boolean checkString(String str) throws MyNumberException{
		if(str.matches("^[-+]?\\d+(\\.\\d+)?$")) //is it a string?
			throw new MyNumberException(); //apparently not
		else{
			return true;
		}
	}
	
	public void getString(){
		try
		{
			System.out.println("Please enter a string."); //asking user to enter a string
			String str = input.nextLine(); //getting user input
			checkString(str); //checking the user input
			System.out.println("You entered " + str); //what did the user enter?
		}
		
		catch (MyNumberException mne) {
			// TODO Auto-generated catch block
			System.err.println(mne.getMessage("You did not enter a string.")); //apparently the user can't follow directions
			writeToLog("You did not enter a string."); //outputting to log file
		}
	}
	
	public void getInt() throws MyNumberException{
		try{
			System.out.println("Please enter a integer"); //asks user to enter a integer
			int num = input.nextInt(); //takes in the users input
			System.out.println("You entered " + num); //displays what the user entered
			input.nextLine(); //to clear out the input
		}
		catch(InputMismatchException ime){
			input.nextLine(); //to clear it out the input
			throw new MyNumberException();
		}
	}
	
	/**
	 * @param args
	 */
	public static void main(String[] args) {
		ExceptionHandling eh = new ExceptionHandling();
	}

}

MyNumberException.java

public class MyNumberException extends Exception{
  public String getMessage(String error){
		return error;
	}
}