ПРОБЛЕМА РЕШЕНА.
Итак, я заканчиваю свое задание, последнее, что нужно сделать, - это реализовать некоторую простую обработку ошибок, но оказывается, что я не совсем уверен, что я делаю неправильно.
У меня есть 5 дел, которые принимают ввод 0, 1, 2, 3, 4. Он работает нормально.
Но если ввод не число, он должен отобразить сообщение, и пользователь может ввести некоторые новый вход. После того, как каждое задание выполнено, вам должно быть представлено меню и возможность сделать новый выбор.
Я могу напечатать сообщение, но не могу принять новый ввод. Я понимаю проблему и почему она возникает, но я не знаю, как ее решить.
import java.io.File;
import java.io.FileNotFoundException;
import java.io.PrintWriter;
import java.util.InputMismatchException;
import java.util.Scanner;
public class ObscureLovecraft {
public static void main(String[] args) {
// Looking for files and opening scanner
File file = new File("./lovecraft.txt");
File readObscure = new File("./obscure.txt");
Scanner sc = new Scanner(System.in);
// Printing UI
printMenu();
// Taking input, looping until case 0 is executed
// Printing menu after each iteration
// Switch, prints a new menu after every iteration
try {
int input = sc.nextInt();
while (input != 0) {
switch (input) {
case 1:
writeObscure(file);
printMenu();
input = sc.nextInt();
break;
case 2:
translateObscure(readObscure);
printMenu();
input = sc.nextInt();
break;
case 3:
printObscure();
printMenu();
input = sc.nextInt();
break;
case 4:
printTranslated();
printMenu();
input = sc.nextInt();
break;
case 0:
kill();
break;
}
}
} catch (InputMismatchException e) {
System.out.println("You must use numbers.");
sc.nextInt();
}
sc.close();
System.out.println(":(");
}
public static void switches() {
}
/**
* Just a method printing our menu
*/
public static void printMenu() {
System.out.println();
System.out.println("Obscure");
System.out.println("=======");
System.out.println("1. Make obscure");
System.out.println("2. Make readable");
System.out.println("3. Print obscure");
System.out.println("4. Print readable");
System.out.println("0. Exit");
}
/**
* Method which will print the "obscured" version of the text
*
* @param file path to the file
*/
public static void writeObscure(File file) {
// Create new output file, creating PrintWriter, StringBuilder and placeholder
// for the text
File outFile = new File("./obscure.txt");
StringBuilder buf = new StringBuilder();
try {
PrintWriter pw = new PrintWriter(outFile);
Scanner fileSc = new Scanner(file);
String text = "";
// Placeholder for chars, looping through the file, adding it to placeholder
// text, with new line
char c;
while (fileSc.hasNextLine()) {
text = (fileSc.nextLine() + "\n");
// Looping through the text, taking each character, pushing it 3 steps in the
// alphabet
// Taking care of z/Z pushing it to a/A, should maybe be c/C? Oh well.
// Appending it to the stringbuilder in the new order
// Casting char to int, to get ascii value
for (int i = 0; i < text.length(); i++) {
c = text.charAt(i);
if (c == 'z') {
buf.append('a');
} else if (c == 'Z') {
buf.append('A');
} else {
int ascii = (int) c;
char nextChar = (char) (ascii + 3);
buf.append(nextChar);
}
}
}
fileSc.close();
// Printing and closing
pw.print(buf);
pw.close();
System.out.println("Done");
} catch (FileNotFoundException e) {
System.out.println("Seems like a file gone missing, check error message: " + e.getMessage());
System.out.println("Printing stacktrace: ");
e.printStackTrace();
}
}
/**
* Method which will translate the obscured text to normal, Basically same as
* the method above, but in reversed order
*
* @param file
*/
public static void translateObscure(File file) {
// Read the file:
StringBuilder obsBuf = new StringBuilder();
try {
Scanner readSC = new Scanner(file);
// Print the file
File printReadable = new File("./readableLovecraft.txt");
PrintWriter pwRead = new PrintWriter(printReadable);
// Text
String readableText = "";
char readC;
// Loop thru
// Something weird happend with empty lines,
// Had to manually skip them
while (readSC.hasNextLine()) {
readableText = (readSC.nextLine() + "\n");
for (int i = 0; i < readableText.length(); i++) {
readC = readableText.charAt(i);
if (readC == '\n') {
obsBuf.append(readC);
} else if (readC == 'z') {
obsBuf.append('a');
} else if (readC == 'Z') {
obsBuf.append('z');
} else {
int ascii = (int) readC;
char nextChar = (char) (ascii - 3);
obsBuf.append(nextChar);
}
}
}
readSC.close();
// Printing and closing
pwRead.print(obsBuf);
pwRead.close();
System.out.println("Done");
} catch (FileNotFoundException e) {
System.out.println("Seems like a file gone missing, check error message: " + e.getMessage());
System.out.println("Printing stacktrace: ");
e.printStackTrace();
}
}
/**
* Simple method which loops through the text and prints it
*/
public static void printObscure() {
File readOutFile = new File("./obscure.txt");
try {
Scanner fileSc = new Scanner(readOutFile);
String readText = "";
while (fileSc.hasNextLine()) {
readText = (fileSc.nextLine());
System.out.println(readText);
}
fileSc.close();
} catch (FileNotFoundException e) {
System.out.println("Seems like a file gone missing, check error message: " + e.getMessage());
System.out.println("Printing stacktrace: ");
e.printStackTrace();
}
}
/**
* Simple method which loops through the text and prints it
*/
public static void printTranslated() {
File readReadOutFile = new File("./readableLovecraft.txt");
String readReadText = "";
Scanner fileSc;
try {
fileSc = new Scanner(readReadOutFile);
while (fileSc.hasNextLine()) {
readReadText = (fileSc.nextLine() + "\n");
System.out.println(readReadText);
}
fileSc.close();
} catch (FileNotFoundException e) {
// TODO Auto-generated catch block
System.out.println("Seems like a file gone missing, check error message: " + e.getMessage());
System.out.println("Printing stacktrace: ");
e.printStackTrace();
}
}
/**
* Method which kills the program
*/
public static void kill() {
System.exit(1);
}
}