Thread: UML diagram

I need to make a UML diagram for my java classes. I know what they are and how to generally make them, but I don't know how to make one for one of my java classes. I was wondering if someone could help me with my problem. Here is the code for the java class that doesn't have a UML diagram:

/** * This class is uses the PasswordChecker class to create an interface that allows users to enter passwords, and if they meet the criteria, they * are stored in a password file. * @author	***** * @since	2012-08-25 */   // This imports all java Input/Output methods so that they can be used by these class methods import java.io.*;   // This allows the PasswordCheckerTester class to use the PasswordChecker class's constructors and methods. import tools.*;   class PasswordCheckerMain {  	// If there is a problem with the user's input, then an IOException will be thrown	public static void main(String args[]) throws IOException {  	// This object is used to read input from the user	BufferedReader userInput = new BufferedReader(new InputStreamReader(System.in));  	// This is the file that the valid passwords will be output to, as well as the file containing the passwords that the PasswordChecker's	// password will be compared to.	String fileName = "passwords.txt";  	// This creates a File object using the String contained in fileName. The File object is stored in the variable fileCheck	File fileCheck = new File(fileName);  	// This variable will be used as a condition for several while loops. Basically, it is used to determine whether the user has entered	// valid input.	boolean acceptableAnswer;  	// This if statement checks to see if the password file already exists	if (fileCheck.exists()) {  	// This prints out a message, and asks the user to input a response.	System.out.print("\n" + "There is an existing password text file." + "\n" + "Would you like to view its contents" + "\n" + "(type Y for yes or N for no, and then press Enter/Return)? ");  	// This is used as a condition to keep the upcoming while loop executing for as long as necessary	acceptableAnswer = false;  	// This while loop will repeat until the user enters a valid response to the previous request	while(!acceptableAnswer) {  	// This reads in the user input and stores it in the variable answer	String answer = userInput.readLine();  	// This if statement checks to see if the user's input was equal to "Y", ignoring the case of the input	if (answer.equalsIgnoreCase("Y")) {  	// This opens the file fileName so that it can be read	FileInputStream fstream = new FileInputStream(fileName);  	// These next two declarations make it possible to actually read the given file and get its contents.	DataInputStream in = new DataInputStream(fstream);  	BufferedReader bufferRead = new BufferedReader(new InputStreamReader(in));  	// This creates the variable stringLine to be used in the upcoming while loop	String stringLine;  	// This while loop reads the contents of the file fileName until it reaches the end. Whenever it reads a line, it stores	// the line in the variable stringLine (overwritting what was previously stored)	while ((stringLine = bufferRead.readLine()) != null) {  	// This prints out what is contained in the variable stringLine	System.out.println(stringLine);	}  	// This closes the file fileName	in.close();  	// This assigns boolean true to the variable acceptableAnswer, which will make the outer while loop will stop executing	acceptableAnswer = true;	}  	// This if statement checks to see if the user's input was equal to "N", ignoring the case of the input	else if (answer.equalsIgnoreCase("N")) {  	// This assigns boolean true to the variable acceptableAnswer, which will make the outer while loop will stop executing	acceptableAnswer = true;	}  	else {  	// This prints out a message, and asks the user to input a response.	System.out.print("Invalid input." + "\n" + "Would you like to view the file's contents" + "\n" + "(type Y for yes or N for no, and then press Enter/Return)? ");	}	}  	// This prints out a message, and asks the user to input a response.	System.out.print("\n" + "Would you like to erase the file's contents" + "\n" + "(type Y for yes or N for no, and then press Enter/Return)? ");  	// This is used as a condition to keep the upcoming while loop executing for as long as necessary	acceptableAnswer = false;  	// This while loop will repeat until the user enters a valid response to the previous request	while(!acceptableAnswer) {  	// This reads in the user input and stores it in the variable answer	String answer = userInput.readLine();  	// This if statement checks to see if the user's input was equal to "Y", ignoring the case of the input	if (answer.equalsIgnoreCase("Y")) {  	// This creates a File object using the String fileName. The File object is stored in the variable yourFile	File yourFile = new File(fileName);  	// This deletes the file used to construct the File object yourFile	yourFile.delete();  	// This creates a File object using the String fileName. The File object is stored in the variable yourNewFile	File yourNewFile = new File(fileName);  	// This creates an empty file in the same directory as the one that this program is stored. The file's name is the	// String in fileName	yourNewFile.createNewFile();  	// This assigns boolean true to the variable acceptableAnswer, which will make the outer while loop will stop executing	acceptableAnswer = true;	}  	// This if statement checks to see if the user's input was equal to "N", ignoring the case of the input	else if (answer.equalsIgnoreCase("N")) {  	// This assigns boolean true to the variable acceptableAnswer, which will make the outer while loop will stop executing	acceptableAnswer = true;	}  	else {  	// This prints out a message, and asks the user to input a response.	System.out.print("Invalid input." + "\n" + "Would you like to erase the file's contents" + "\n" + "(type Y for yes or N for no, and then press Enter/Return)? ");	}	}  	// This prints out a message	System.out.println("\n" + "This program will require you to enter a password that meets the following" + "\n" + "criteria:" + "\n");  	// This prints out a message	System.out.println("The password must have at least 8 characters, but no more than 10 characters.");  	// This prints out a message	System.out.println("The password must have at least one capital letter.");  	// This prints out a message	System.out.println("The password must have at least one special character (ex. !, @, #, etc.)");  	// This prints out a message	System.out.println("The password cannot be one that is already stored in the password file." + "\n");  	// This prints out a message, and asks the user to input a response.	System.out.print("Please enter your password: ");  	// This is used as a condition to keep the upcoming while loop executing for as long as necessary	boolean done = false;  	// This while loop will repeat until the user is done with this program	while (!done) {  	// This reads in the user input and stores it in the variable userPassword	String userPassword = userInput.readLine();  	// This creates a PasswordChecker object using the String contained in userPassword. The PasswordChecker object is stored	// in the variable checker	PasswordChecker checker = new PasswordChecker(userPassword);  	// This checks to see if the checkLength() method of the PasswordChecker class will return true	if (checker.checkLength()) {  	// This checks to see if the checkCapital() method of the PasswordChecker class will return true	if (checker.checkCapital()) {  	// This checks to see if the checkSpecial() method of the PasswordChecker class will return true	if (checker.checkSpecial()) {  	// This checks to see if the checkNoDuplicate() method of the PasswordChecker class will return true	if (checker.checkNoDuplicate(fileName)) {  	// This prints out a message	System.out.println("Valid password.");  	// It is possible that an exception will occur when the password file is opened for output, hence why a	// try/catch block is used	try {  	// This opens the file fileName for output	FileWriter fstream = new FileWriter(fileName, true);  	// This object is what is used to output data tot he file fileName	BufferedWriter out = new BufferedWriter(fstream);  	// This writes whatever is in the first set of parentheses (in this case, it is checker.getPassword()) to	// the file that was opend for output (in this case, fileName)	out.write(checker.getPassword());  	// This writes whatever is in the first set of parentheses (in this case, a newline character) to	// the file that was opend for output (in this case, fileName)	out.write("\n");  	// This closes the file	out.close();  	// This prints out a message, and asks the user to input a response.	System.out.print("\n" + "Would you like to view the password file's contents" + "\n" + "(type Y for yes or N for no, and then press Enter/Return)? ");  	// This is used as a condition to keep the upcoming while loop executing for as long as necessary	acceptableAnswer = false;  	// This while loop will repeat until the user enters a valid response to the previous request	while(!acceptableAnswer) {  	// This reads in the user input and stores it in the variable answer	String answer = userInput.readLine();  	// This if statement checks to see if the user's input was equal to "Y", ignoring the case of the input	if (answer.equalsIgnoreCase("Y")) {  	// This opens the file fileName so that it can be read	FileInputStream fstream2 = new FileInputStream(fileName);  	// These next two declarations make it possible to actually read the given file and get its contents.	DataInputStream in2 = new DataInputStream(fstream2);  	BufferedReader bufferRead2 = new BufferedReader(new InputStreamReader(in2));  	// This creates the variable stringLine to be used in the upcoming while loop	String stringLine2;  	// This while loop reads the contents of the file fileName until it reaches the end. Whenever it reads a line, it stores	// the line in the variable stringLine (overwritting what was previously stored)	while ((stringLine2 = bufferRead2.readLine()) != null) {  	// This prints out what is stored in variable stringLine2	System.out.println(stringLine2);	}  	// This closes the file fileName	in2.close();  	// This assigns boolean true to the variable acceptableAnswer, which will make the outer while loop will stop executing	acceptableAnswer = true;	}  	// This if statement checks to see if the user's input was equal to "N", ignoring the case of the input	else if (answer.equalsIgnoreCase("N")) {  	// This assigns boolean true to the variable acceptableAnswer, which will make the outer while loop will stop executing	acceptableAnswer = true;	}  	else {  	// This prints out a message, and asks the user to input a response.	System.out.print("Invalid input." + "\n" + "Would you like to view the password file's contents" + "\n" + "(type Y for yes or N for no, and then press Enter/Return)? ");	}	}  	}  	// If an exception does occur when opening fileName for output, this catch block will execute, print out a	// message, and the program will terminate	catch (Exception error){  	System.err.println("Error: " + error.getMessage());	}	}  	else {  	// This prints out a message	System.out.println("This password is already in the password file.");	}	}  	else {  	// This prints out a message	System.out.println("Password does not contain a special character.");	}	}  	else {  	// This prints out a message	System.out.println("Password does not contain a capital letter.");	}	}  	else {  	// This prints out a message	System.out.println("Invalid password length.");	}  	// This prints out a message, and asks the user to input a response.	System.out.print("\n" + "Do you want to enter another password" + "\n" + "(type Y for yes or N for no, and then press Enter/Return)? ");  	// This is used as a condition to keep the upcoming while loop executing for as long as necessary	acceptableAnswer = false;  	// This while loop will repeat until the user enters a valid response to the previous request	while(!acceptableAnswer) {  	// This reads in the user input and stores it in the variable answer	String answer = userInput.readLine();  	// This if statement checks to see if the user's input was equal to "Y", ignoring the case of the input	if (answer.equalsIgnoreCase("Y")) {  	// This assigns boolean true to the variable acceptableAnswer, which will make the inner while loop will stop executing	acceptableAnswer = true;  	// This prints out a message	System.out.println("\n" + "The password must have at least 8 characters, but no more than 10 characters.");  	// This prints out a message	System.out.println("The password must have at least one capital letter.");  	// This prints out a message	System.out.println("The password must have at least one special character (ex. !, @, #, etc.)");  	// This prints out a message	System.out.println("The password cannot be one that is already stored in the password file." + "\n");  	// This prints out a message, and asks the user to input a response.	System.out.print("Please enter your password: ");	}  	// This if statement checks to see if the user's input was equal to "N", ignoring the case of the input	else if (answer.equalsIgnoreCase("N")) {  	// This assigns boolean true to the variable acceptableAnswer, which will make the inner while loop will stop executing	acceptableAnswer = true;  	// This assigns boolean true to the variable done, which will make the outer while loop will stop executing	done = true;	}  	else {  	// This prints out a message, and asks the user to input a response.	System.out.print("\n" + "Invalid input." + "\n" + "Would you like to enter another password" + "\n" + "(type Y for yes or N for no, and then press Enter/Return)? ");	}	}	}	}  	else {  	// This block will only execute if the file used to create fileCheck does not exist. This method will create an empty file with a	// name that is equal to the String that was used to create the File object fileCheck	fileCheck.createNewFile();  	// This prints out a message	System.out.println("\n" + "This program will require you to enter a password that meets the following" + "\n" + "criteria:" + "\n");  	// This prints out a message	System.out.println("The password must have at least 8 characters, but no more than 10 characters.");  	// This prints out a message	System.out.println("The password must have at least one capital letter.");  	// This prints out a message	System.out.println("The password must have at least one special character (ex. !, @, #, etc.)");  	// This prints out a message	System.out.println("The password cannot be one that is already stored in the password file." + "\n");  	// This prints out a message, and asks the user to input a response.	System.out.print("Please enter your password: ");  	// This is used as a condition to keep the upcoming while loop executing for as long as necessary	boolean done = false;  	// This while loop will repeat until the user is done with this program	while (!done) {  	// This reads in the user input and stores it in the variable userPassword	String userPassword = userInput.readLine();  	// This creates a PasswordChecker object using the String contained in the variable userPassword. The object is stored in	// the variable checker	PasswordChecker checker = new PasswordChecker(userPassword);  	// This checks to see if the checkLength() method of the PasswordChecker class will return true	if (checker.checkLength()) {  	// This checks to see if the checkCapital() method of the PasswordChecker class will return true	if (checker.checkCapital()) {  	// This checks to see if the checkSpecial() method of the PasswordChecker class will return true	if (checker.checkSpecial()) {  	// This checks to see if the checkNoDuplicate() method of the PasswordChecker class will return true	if (checker.checkNoDuplicate(fileName)) {  	// This prints out a message	System.out.println("Valid password.");  	// It is possible that an error will occur when the password file is opend for output, hence why a try/catch block	// is used	try{  	// This opens the file fileName for output	FileWriter fstream = new FileWriter(fileName, true);  	// This object is what is used to output data tot he file fileName	BufferedWriter out = new BufferedWriter(fstream);  	// This writes whatever is in the first set of parentheses (in this case, it is checker.getPassword()) to	// the file that was opend for output (in this case, fileName)	out.write(checker.getPassword());  	// This writes whatever is in the first set of parentheses (in this case, a newline character) to	// the file that was opend for output (in this case, fileName)	out.write("\n");  	// This closes the file	out.close();  	// This prints out a message, and asks the user to input a response.	System.out.print("\n" + "Would you like to view the password file's contents" + "\n" + "(type Y for yes or N for no, and then press Enter/Return)? ");  	// This is used as a condition to keep the upcoming while loop executing for as long as necessary	acceptableAnswer = false;  	// This while loop will repeat until the user enters a valid response to the previous request	while(!acceptableAnswer) {  	// This reads in the user input and stores it in the variable answer	String answer = userInput.readLine();  	// This if statement checks to see if the user's input was equal to "Y", ignoring the case of the input	if (answer.equalsIgnoreCase("Y")) {  	// This opens the file fileName so that it can be read	FileInputStream fstream2 = new FileInputStream(fileName);  	// These next two declarations make it possible to actually read the given file and get its contents.	DataInputStream in2 = new DataInputStream(fstream2);  	BufferedReader bufferRead2 = new BufferedReader(new InputStreamReader(in2));  	// This creates the variable stringLine to be used in the upcoming while loop	String stringLine2;  	// This while loop reads the contents of the file fileName until it reaches the end. Whenever it reads a line, it stores	// the line in the variable stringLine (overwritting what was previously stored)	while ((stringLine2 = bufferRead2.readLine()) != null) {  	// This prints out what is stored in variable stringLine2	System.out.println(stringLine2);	}  	// This closes the file fileName	in2.close();  	// This assigns boolean true to the variable acceptableAnswer, which will make the outer while loop will stop executing	acceptableAnswer = true;	}  	// This if statement checks to see if the user's input was equal to "N", ignoring the case of the input	else if (answer.equalsIgnoreCase("N")) {  	// This assigns boolean true to the variable acceptableAnswer, which will make the outer while loop will stop executing	acceptableAnswer = true;	}  	else {  	// This prints out a message, and asks the user to input a response.	System.out.print("Invalid input." + "\n" + "Would you like to view the password file's contents" + "\n" + "(type Y for yes or N for no, and then press Enter/Return)? ");	}	}  	}  	// If an exception does occur when opening fileName for output, this catch block will execute, print out a	// message, and the program will terminate	catch (Exception error){  	System.err.println("Error: " + error.getMessage());	}	}  	else {  	// This prints out a message	System.out.println("This password is already in the password file.");	}	}  	else {  	// This prints out a message	System.out.println("Password does not contain a special character.");	}	}  	else {  	// This prints out a message	System.out.println("Password does not contain a capital letter.");	}	}  	else {  	// This prints out a message	System.out.println("Invalid password length.");	}  	// This prints out a message, and asks the user to input a response.	System.out.print("\n" + "Do you want to enter another password" + "\n" + "(type Y for yes or N for no, and then press Enter/Return)? ");  	// This is used as a condition to keep the upcoming while loop executing for as long as necessary	acceptableAnswer = false;  	// This while loop will repeat until the user enters a valid response to the previous request	while(!acceptableAnswer) {  	// This reads in the user input and stores it in the variable answer	String answer = userInput.readLine();  	// This if statement checks to see if the user's input was equal to "Y", ignoring the case of the input	if (answer.equalsIgnoreCase("Y")) {  	// This assigns boolean true to the variable acceptableAnswer, which will make the inner while loop will stop executing	acceptableAnswer = true;  	// This prints out a message	System.out.println("\n" + "The password must have at least 8 characters, but no more than 10 characters.");  	// This prints out a message	System.out.println("The password must have at least one capital letter.");  	// This prints out a message	System.out.println("The password must have at least one special character (ex. !, @, #, etc.)");  	// This prints out a message	System.out.println("The password cannot be one that is already stored in the password file." + "\n");  	// This prints out a message, and asks the user to input a response.	System.out.print("Please enter your password: ");	}  	else if (answer.equalsIgnoreCase("N")) {  	// This assigns boolean true to the variable acceptableAnswer, which will make the inner while loop will stop executing	acceptableAnswer = true;  	// This assigns boolean true to the variable done, which will make the outer while loop will stop executing	done = true;	}  	else {  	// This prints out a message, and asks the user to input a response.	System.out.print("\n" + "Invalid input." + "\n" + "Would you like to enter another password" + "\n" + "(type Y for yes or N for no, and then press Enter/Return)? ");	}	}	}	}  	// This will close the userInput channel	userInput.close();	} }

Here is the code for the java class that does have a UML diagram:

/** * This class is used to generate PasswordChecker objects, which have a String called password as a parameter for its construction. There is also * a char array that is used for checking the String password, but it cannot be accessed otherwise. The methods for this class include * getPassword(), checkLength(), checkCapital(), checkSpecial(), and checkDuplicate * @author	***** * @since	2012-08-25 */   // This specifies that this class is part of the package called tools. If a program wishes to use this class, then it just needs to have the // statement "include tools.* at the top of the program package tools;   // This imports all java Input/Output methods so that they can be used by these class methods import java.io.*;   public class PasswordChecker {  	// The password that will be checked by the members of the PasswordChecker class	private String password;  	// This array has all special characters in it. It is used to check to see that password has at least one of these characters in it.	private char[] specialChar = {'!','@','#','$','%','^','&','*','(',')','-','_','=','+','[','{',']','}','|',';',':',',','<','.','>','/','?'};  	/**	* The constructor for PasswordChecker	* @param userPassword A String that is used to represent the password	*/	public PasswordChecker(String userPassword) {  	password = userPassword;	}  	/**	* The constructor for PasswordChecker that is used if there is not a password passed to PasswordChecker. The password variable is assigned	* a blank String	*/	public PasswordChecker() {  	password = "";	}  	/**	* Returns the password used to construct the PasswordChecker object	* @return the password used to construct the PasswordChecker object	*/	public String getPassword() {  	return password;	}  	/**	* Checks to see if the password String is greater than or equal to 8 characters in length and less than or equal to 10 characters in length.	* @return boolean true if the password String is greater than or equal to 8 characters in length and less than or equal to 10 characters in	* length, boolean false otherwise	*/	public boolean checkLength() {  	// the length of the password String. It is used in the upcoming if statement	int length = password.length();  	// Checks to see if the length of the password is greater than or equal to 8 and less than or equal to 10	if (length >= 8 && length <= 10) {  	return true;	}  	else {  	return false;	}	}  	/**	* Checks to see if the password String has at least 1 capital letter in it.	* @return boolean true if the password String has at least 1 capital letter in it, boolean false otherwise	*/	public boolean checkCapital() {  	// This for loop iterates for a duration equal to the length of the password String, or until the nested if statement is true	for (int i = 0; i <= password.length() - 1; i++) {  	// This variable is assigned the character that is equal to the character in the password String whose placement is 'i'. For example,	// if i = 0 and password = "cat", then character = 'c' (because 'c' is the 0th character in the String "cat"). When i = 1,	// character = 'a'	char character = password.charAt(i);  	// This if statement checks to see if the char in the variable character is a capital letter. If it is, then the function returns	// boolean true and stops.	if (Character.isUpperCase(character)) {  	return true;	}	}  	// This happens if the for loop iterates for its entire duration and the nested if statement is never true (which means the password	// String did not have a capital letter).	return false;	}  	/**	* Checks to see if the password String has at least 1 special character in it.	* @return boolean true if the password String has at least 1 special character in it, boolean false otherwise	*/	public boolean checkSpecial() {  	// This for loop iterates for a duration equal to the length of the password String, or until the nested if statement is true	for (int i = 0; i <= password.length() - 1; i++) {  	// This variable is assigned the character that is equal to the character in the password String whose placement is 'i'. For example,	// if i = 0 and password = "cat", then character = 'c' (because 'c' is the 0th character in the String "cat"). When i = 1,	// character = 'a'	char character = password.charAt(i);  	// This for loop iterates for a duration equal to the size of the specialChar array, or until the nested if statemet is true	for (int j = 0; j <= specialChar.length - 1; j++) {  	// This if statement checks to see if the char in the variable character is a special character. If it is, then the function	// boolean true and stops.	if (character == specialChar[j]) {  	return true;	}	}	}  	// This happens if the outer for loop iterates for its entire duration and the nested if statement, in the nested for loop, is never true	// (which means the password String did not have a capital letter).	return false;	}  	/**	* Checks the given file to see if there is a String that is exactly the same as the password String. If the file cannot be found, or there	* is some other problem with opening the given file, then an exception will be caught and the method will end.	* @param fileName a String that is the filename of a file that should contain String passwords. The contained String passwords will be	* compared with the String password stored in the PasswordChecker object.	* @return boolean true if there is not a String in fileName that is exactly the same as the password String, boolean false otherwise	*/	public boolean checkNoDuplicate(String fileName) {  	// There is a chance an error will occur, such as the file with name fileName not existing or the file not opening correctly. Hence why	// a Try/Catch block is used.	try {  	// This opens the file whose name is provided as the argument for this method	FileInputStream fstream = new FileInputStream(fileName);  	// These next two declarations make it possible to actually read the given file and get its contents.	DataInputStream in = new DataInputStream(fstream);  	BufferedReader bufferRead = new BufferedReader(new InputStreamReader(in));  	// This creates a String variable called stringLine, which is to be used in the upcoming while loop	String stringLine;  	// This while loop will read every line in the file until it reaches the end of the file (in which case the the variable	// stringLine will be NULL) or until a password is found in the file that is the same as the password contained in the	// PasswordChecker object	while ((stringLine = bufferRead.readLine()) != null) {  	// This is where the loop checks to see if the file contains the same password contained in the PasswordChecker object.	// If this happens, then the file is closed, and the method returns FALSE	if (password.equals(stringLine)) {  	// This closes the file that was opened for input	in.close();  	return false;	}	}  	// If no match is found, the file is closed, and the method returns TRUE	in.close();  	return true;	}  	// If an exception does occur, this catch block will execute, a message will be printed, and the method will stop executing	catch (Exception error){  	System.err.println("Error: " + error.getMessage());	}  	// If an error occurs, then the method returns FALSE	return false;	} }

Both work BTW, I just need the UML diagram for the first one