I understand that there is a lot of content in this question, but I am not askin
ID: 3870392 • Letter: I
Question
I understand that there is a lot of content in this question, but I am not asking for help on the entire project, just one class. Most of the information provided is needed in order for clarity of what I need help with. Thanks.
This code is meant to prompt for an input file, generate a symbol dictionary from the input file, and then write the resulting symbols to an output file, one symbol to a line. Symbols, for this project, are defined as a string of characters that do NOT include blanks, numeric, and special characters. For example, “JLabel(“Color Example”, SwingConstants.CENTER);” contains five symbols, “JLabel”, “Color”, “Example”, “SwingConstants”, and “CENTER”. All special characters should be ignored.
The necessary classes are as follows :
Class Symbol – represents symbols
Class SymbolDictionary – represents a dictionary of symbols//NEED HELP WITH WITH ENTIRE CLASS
Class SymbolIO – a class to handle all of the file IO operations that your project needs
Class Driver – A driver class
I am providing the code that I have already written, along with the UML for Symbol class and SymbolDictioary class in order to promote clarity. If you see issues with the code I have already written, help would be appreciated with that as well. Thanks for any information you can provide.
***One more possibly helpful tip, my SymbolIO class returns a String array of the tokenized file. If there is a better solution for this, I appreciate it.
SYMBOL UML
Class Symbol
INSTANCE DATA FIELDS
-strToken : String
METHODS
+Symbol(String sym)
It should throw an IllegalArgumentException with an appropriate message if an illegal symbol is attempted.
+clone()
The clone() method should create a clone, a “deep copy”, of Symbol.
+equals(Symbol sym)
SYMBOL DICTIONARY UML
SymbolDictionary UML: Remember that duplicate symbols ARE NOT ALLOWED
//PART I NEED HELP WITH
Class SymbolDictionary
INSTANCE DATA FIELDS
Internal array(s) of symbols
The maximum number of symbols that may be stored in the array is 200.
METHODS
+findIndex(Symbol
sym) : int
Searches the array of symbols for the symbol. If the symbol is found, the method returns the index of the position of the symbol in the array. If the symbol is not found, findIndex adds the symbol to the array at the first vacant position and returns the index of that position.
+isPresent(Symbol sym) : boolean
Returns true or false, corresponding to whether or not the symbol is present in the dictionary.
+remove(Symbol sym) : void
Removes the symbol from the dictionary, leaving the index of the symbol unused (i.e., this creates a vacant position in the array). This method takes no action if the symbol is not present.
MY CODE:
Symbol Class
public class Symbol{
String sym;
Symbol(String sym){
this.sym=sym;
}
@Override
public String toString() {
return sym;
}
public Object clone(){
Symbol s;
try{
s = (Symbol) super.clone();
}
catch(CloneNotSupportedException e){
return null;
}
return s;
}
public boolean equals(Symbol sym){
Symbol s;
if(sym instanceof Symbol){
s = (Symbol) sym;
return true;
}
else{
return false;
}
}
}
SymbolIO Class
import java.util.Scanner;
import java.util.regex.Pattern;
import java.io.File;
import java.io.FileNotFoundException
public class SymbolIO {
Scanner sc = null;
Pattern pattern = Pattern.compile("[^\p{Alpha}']+");
String str;
File inputFile;
String[] symbolArr = new String [200];
public SymbolIO(String name){
inputFile = new File(name);
}
public String[] readFile(File file){
try{
sc = new Scanner(file);
}
catch(FileNotFoundException e){
System.out.println("Not Found");
}
int i =0;
while(sc.hasNext()){
sc.useDelimiter(pattern);
str = sc.next();
if(!str.equals("")){
symbolArr[i] = str;
}
i++;
}
return symbolArr;
}}
Class Symbol
INSTANCE DATA FIELDS
-strToken : String
METHODS
+Symbol(String sym)
It should throw an IllegalArgumentException with an appropriate message if an illegal symbol is attempted.
+clone()
The clone() method should create a clone, a “deep copy”, of Symbol.
+equals(Symbol sym)
Explanation / Answer
I have modified your existing class and created the new classes needed. Hope the answer helped. In case of any issues , post a comment. If the answer helped, please do rate it. Thank you
Symbol.java
public class Symbol{
String strToken;
Symbol(String sym){
this.strToken=sym;
}
@Override
public String toString() {
return strToken;
}
public Object clone(){
Symbol s;
try{
s = (Symbol) super.clone();
s.strToken = strToken;
}
catch(CloneNotSupportedException e){
return null;
}
return s;
}
public boolean equals(Symbol sym){
return strToken.equals(sym.strToken);
}
}
SymbolIO.java
import java.util.Scanner;
import java.util.regex.Pattern;
import java.io.File;
import java.io.FileNotFoundException;
public class SymbolIO {
private Scanner inputFile = null;
Pattern pattern = Pattern.compile("[^\p{Alpha}']+"); //1 or more non alphabet chars
public SymbolIO(String name) throws FileNotFoundException {
inputFile = new Scanner(new File(name));
inputFile.useDelimiter(pattern);
}
public boolean hasNext()
{
return inputFile.hasNext();
}
public Symbol next()
{
String sym = inputFile.next();
return new Symbol(sym);
}
public void close()
{
inputFile.close();
}
}
SymbolDictionary.java
public class SymbolDictionary {
private Symbol[] symbols;
public SymbolDictionary()
{
symbols = new Symbol[200];
}
int findIndex(Symbol sym)
{
int vacant = -1;
for(int i = 0; i < symbols.length; i++)
{
if(symbols[i] == null)
{
if(vacant == -1)
vacant = i; //save the first vacant index in case its needed if symbol was not found
}
else
{
if(symbols[i].equals(sym))
return i;
}
}
//not returned any index from loop above , so symbol not found,
//addd it to vacant position
if(vacant != -1) //there is some vacant position
symbols[vacant] = sym;
return vacant;
}
public boolean isPresent(Symbol sym)
{
for(int i =0 ; i < symbols.length; i++)
if(symbols[i].equals(sym))
return true;
//not found
return false;
}
public void removeSymbol(Symbol sym)
{
for(int i =0 ; i < symbols.length; i++)
if(symbols[i].equals(sym))
{
symbols[i] = null; //make it vacant
break;
}
}
public String toString()
{
String str = "" ;
for(int i = 0; i < symbols.length; i++)
{
if(symbols[i] != null)
str += symbols[i] + " ";
}
return str;
}
}
Driver.java
import java.io.FileNotFoundException;
import java.io.PrintWriter;
import java.util.Scanner;
public class Driver {
public static void main(String[] args) {
Scanner keybd = new Scanner(System.in);
String inFile, outFile;
System.out.print("Enter input filename: ");
inFile = keybd.nextLine().trim();
System.out.print("Enter output filename: ");
outFile = keybd.nextLine().trim();
try {
SymbolIO symIO = new SymbolIO(inFile);
SymbolDictionary dict = new SymbolDictionary();
Symbol s;
while(symIO.hasNext())
{
s = symIO.next();
dict.findIndex(s); //if not present , will add it in vacant position
}
symIO.close();
//Write teh symbols to output file
PrintWriter pw = new PrintWriter(outFile);
pw.write(dict.toString());
pw.close();
System.out.println("Symbols written to " + outFile);
} catch (FileNotFoundException e) {
System.out.println(e.getMessage());
}
}
}
input file: syminput.txt
“JLabel(“Color Example”, SwingConstants.CENTER);”
output file: symoutput.txt
JLabel
Color
Example
SwingConstants
CENTER