Java: Below are 3 java files along with a text file. Make sure in the console, shank.txt is read into tokens. Make sure to show the 3 java files with the screenshot of shank.txt being printed out in the console. The output must show shank.txt being printed out in tokens. There must be no error at all. Main.java import java.io.IOException; import java.nio.file.Files; import java.nio.file.Paths; import java.util.List; public class Shank { public static void main(String[] args) { if (args.length != 1) { System.out.println("Error: Exactly one argument is required."); System.exit(0); } String filename = args[0]; try { List lines = Files.readAllLines(Paths.get(filename)); Lexer lexer = new Lexer(); for (String line : lines) { try { List tokens = lexer.lex(line); for (Token token : tokens) { System.out.println(token); } } catch (Exception e) { System.out.println("Exception: " + e.getMessage()); } } } catch (IOException e) { System.out.println("Error: Could not read file '" + filename + "'."); } } } Lexer.java import java.util.ArrayList; import java.util.List; public class Lexer { private static final int INTEGER_STATE = 1; private static final int DECIMAL_STATE = 2; private static final int IDENTIFIER_STATE = 3; private static final int ERROR_STATE = 4; private static final char EOF = (char) -1; private static String input; private static int index; private static char currentChar; public List lex(String inputString) throws Exception { input = inputString; index = 0; currentChar = input.charAt(index); List tokens = new ArrayList(); while (currentChar != EOF) { switch (currentState()) { case INTEGER_STATE: integerState(tokens); break; case DECIMAL_STATE: decimalState(tokens); break; case IDENTIFIER_STATE: identifierState(tokens); break; case ERROR_STATE: throw new Exception("Invalid character: " + currentChar); default: break; } } return tokens; } private static int currentState() { if (Character.isDigit(currentChar)) { return INTEGER_STATE; } else if (Character.isLetter(currentChar)) { return IDENTIFIER_STATE; } else if (currentChar == '.') { return DECIMAL_STATE; } else { return ERROR_STATE; } } private static void integerState(List tokens) { StringBuilder builder = new StringBuilder(); while (Character.isDigit(currentChar)) { builder.append(currentChar); advance(); } tokens.add(new Token(Token.TokenType.NUMBER, builder.toString())); } private static void decimalState(List tokens) { StringBuilder builder = new StringBuilder(); builder.append(currentChar); advance(); while (Character.isDigit(currentChar)) { builder.append(currentChar); advance(); } tokens.add(new Token(Token.TokenType.NUMBER, builder.toString())); } private static void identifierState(List tokens) { StringBuilder builder = new StringBuilder(); while (Character.isLetterOrDigit(currentChar)) { builder.append(currentChar); advance(); } tokens.add(new Token(Token.TokenType.WORD, builder.toString())); } private static void advance() { index++; if (index >= input.length()) { currentChar = EOF; } else { currentChar = input.charAt(index); } } } Token.java public class Token { public enum TokenType { WORD, NUMBER, SYMBOL } public TokenType tokenType; private String value; public Token(TokenType type, String val) { this.tokenType = type; this.value = val; } public TokenType getTokenType() { return this.tokenType; } public String toString() { return this.tokenType + ": " + this.value; } } shank.txt Fibonoacci (Iterative) define add (num1,num2:integer var sum : integer) variable counter : integer Finonacci(N) int N = 10; while counter < N define start () variables num1,num2,num3 : integer add num1,num2,var num3 {num1 and num2 are added together to get num3} num1 = num2; num2 = num3; counter = counter + 1; GCD (Recursive) define add (int a,int b : gcd) if b = 0 sum = a sum gcd(b, a % b) GCD (Iterative) define add (inta, intb : gcd) if a = 0 sum = b if b = 0 sum = a while counter a != b if a > b a = a - b; else b = b - a; sum = a; variables a,b : integer a = 60 b = 96 subtract a,b
Java: Below are 3 java files along with a text file. Make sure in the console, shank.txt is read into tokens. Make sure to show the 3 java files with the screenshot of shank.txt being printed out in the console. The output must show shank.txt being printed out in tokens. There must be no error at all.
Main.java
import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Paths;
import java.util.List;
public class Shank {
public static void main(String[] args) {
if (args.length != 1) {
System.out.println("Error: Exactly one argument is required.");
System.exit(0);
}
String filename = args[0];
try {
List<String> lines = Files.readAllLines(Paths.get(filename));
Lexer lexer = new Lexer();
for (String line : lines) {
try {
List<Token> tokens = lexer.lex(line);
for (Token token : tokens) {
System.out.println(token);
}
} catch (Exception e) {
System.out.println("Exception: " + e.getMessage());
}
}
} catch (IOException e) {
System.out.println("Error: Could not read file '" + filename + "'.");
}
}
}
Lexer.java
import java.util.ArrayList;
import java.util.List;
public class Lexer {
private static final int INTEGER_STATE = 1;
private static final int DECIMAL_STATE = 2;
private static final int IDENTIFIER_STATE = 3;
private static final int ERROR_STATE = 4;
private static final char EOF = (char) -1;
private static String input;
private static int index;
private static char currentChar;
public List<Token> lex(String inputString) throws Exception {
input = inputString;
index = 0;
currentChar = input.charAt(index);
List<Token> tokens = new ArrayList<Token>();
while (currentChar != EOF) {
switch (currentState()) {
case INTEGER_STATE:
integerState(tokens);
break;
case DECIMAL_STATE:
decimalState(tokens);
break;
case IDENTIFIER_STATE:
identifierState(tokens);
break;
case ERROR_STATE:
throw new Exception("Invalid character: " + currentChar);
default:
break;
}
}
return tokens;
}
private static int currentState() {
if (Character.isDigit(currentChar)) {
return INTEGER_STATE;
} else if (Character.isLetter(currentChar)) {
return IDENTIFIER_STATE;
} else if (currentChar == '.') {
return DECIMAL_STATE;
} else {
return ERROR_STATE;
}
}
private static void integerState(List<Token> tokens) {
StringBuilder builder = new StringBuilder();
while (Character.isDigit(currentChar)) {
builder.append(currentChar);
advance();
}
tokens.add(new Token(Token.TokenType.NUMBER, builder.toString()));
}
private static void decimalState(List<Token> tokens) {
StringBuilder builder = new StringBuilder();
builder.append(currentChar);
advance();
while (Character.isDigit(currentChar)) {
builder.append(currentChar);
advance();
}
tokens.add(new Token(Token.TokenType.NUMBER, builder.toString()));
}
private static void identifierState(List<Token> tokens) {
StringBuilder builder = new StringBuilder();
while (Character.isLetterOrDigit(currentChar)) {
builder.append(currentChar);
advance();
}
tokens.add(new Token(Token.TokenType.WORD, builder.toString()));
}
private static void advance() {
index++;
if (index >= input.length()) {
currentChar = EOF;
} else {
currentChar = input.charAt(index);
}
}
}
Token.java
public class Token {
public enum TokenType {
WORD,
NUMBER,
SYMBOL
}
public TokenType tokenType;
private String value;
public Token(TokenType type, String val) {
this.tokenType = type;
this.value = val;
}
public TokenType getTokenType() {
return this.tokenType;
}
public String toString() {
return this.tokenType + ": " + this.value;
}
}
shank.txt
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I ran all 3 java files with the text file and this is the error I got. The error is attached as an image. Please double check and make sure all 3 java files along with the text files work with the screenshot of shank.txt being printed out in the console. The output must show shank.txt being printed out in tokens. There must be no error at all.
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