I’m a beginner in Java and after a few time of studying this language by books, I decided to write a simple program that “encrypts” a string by replacing numbers with letters and vice versa. It is not finished yet and has some considerable restrictions, but it should work as is.
The code:
import java.util.Scanner;
class Chiffrator {
public static void main (String args[]) {
Scanner input = new Scanner(System.in); // Initializing keyboard scanner, like arrays (Scanner [name] = new Scanner(System.in)
String initial_code; // Initializing the string into which the text will be entered
System.out.println ("Enter initial code: ");
initial_code = input.next(); // Initializing input process, with syntax [string_name] = [scanner_name].next()
char letters[] = {a,b,c,d,e,f,g,h,i,j};
numbers = new numbers[9];
int i,j,k;
for (i=0; i=9; i++) {
numbers[i] = i;
i++;
}
for (k=0; k=init_code.length(); k++) { // .length() is a method!
if initial_code.contains(numbers))
numbers[k] = letters[k];
else if initial_code.contains(letters))
letters[k] = numbers [k];
k++;
}
System.out.println ("Your chiffred code is " + initial_code);
}
}
It doesn’t work. When I try to compile it through Terminal on my Mac, there are 2 errors:
Chiffrator.java:24: error: '(' expected
if initial_code.contains(numbers))
^
Chiffrator.java:26: error: '(' expected
else if initial_code.contains(letters))
^
If I try to insert those brackets, compiler says I have 20 errors in code.
Chiffrator.java:12: error: cannot find symbol
char letters[] = {a,b,c,d,e,f,g,h,i,j};
^
symbol: variable a
location: class Chiffrator
Chiffrator.java:12: error: cannot find symbol
char letters[] = {a,b,c,d,e,f,g,h,i,j};
^
symbol: variable b
location: class Chiffrator
Chiffrator.java:12: error: cannot find symbol
char letters[] = {a,b,c,d,e,f,g,h,i,j};
^
symbol: variable c
location: class Chiffrator
Chiffrator.java:12: error: cannot find symbol
char letters[] = {a,b,c,d,e,f,g,h,i,j};
^
symbol: variable d
location: class Chiffrator
Chiffrator.java:12: error: cannot find symbol
char letters[] = {a,b,c,d,e,f,g,h,i,j};
^
symbol: variable e
location: class Chiffrator
Chiffrator.java:12: error: cannot find symbol
char letters[] = {a,b,c,d,e,f,g,h,i,j};
^
symbol: variable f
location: class Chiffrator
Chiffrator.java:12: error: cannot find symbol
char letters[] = {a,b,c,d,e,f,g,h,i,j};
^
symbol: variable g
location: class Chiffrator
Chiffrator.java:12: error: cannot find symbol
char letters[] = {a,b,c,d,e,f,g,h,i,j};
^
symbol: variable h
location: class Chiffrator
Chiffrator.java:12: error: cannot find symbol
char letters[] = {a,b,c,d,e,f,g,h,i,j};
^
symbol: variable i
location: class Chiffrator
Chiffrator.java:12: error: cannot find symbol
char letters[] = {a,b,c,d,e,f,g,h,i,j};
^
symbol: variable j
location: class Chiffrator
Chiffrator.java:13: error: cannot find symbol
numbers = new numbers[9];
^
symbol: variable numbers
location: class Chiffrator
Chiffrator.java:13: error: cannot find symbol
numbers = new numbers[9];
^
symbol: class numbers
location: class Chiffrator
Chiffrator.java:18: error: incompatible types: int cannot be converted to boolean
for (i=0; i=9; i++) {
^
Chiffrator.java:19: error: cannot find symbol
numbers[i] = i;
^
symbol: variable numbers
location: class Chiffrator
Chiffrator.java:24: error: cannot find symbol
for (k=0; k=init_code.length(); k++) // .length() is a method!
^
symbol: variable init_code
location: class Chiffrator
Chiffrator.java:24: error: incompatible types: int cannot be converted to boolean
for (k=0; k=init_code.length(); k++) // .length() is a method!
^
Chiffrator.java:25: error: cannot find symbol
if (cont_let = (initial_code.contains(numbers)))
^
symbol: variable numbers
location: class Chiffrator
Chiffrator.java:26: error: cannot find symbol
numbers[k] = letters[k];
^
symbol: variable numbers
location: class Chiffrator
Chiffrator.java:27: error: incompatible types: char[] cannot be converted to CharSequence
else if (cont_num = (initial_code.contains(letters)))
^
Chiffrator.java:28: error: cannot find symbol
letters[k] = numbers [k];
^
symbol: variable numbers
location: class Chiffrator
Note: Some messages have been simplified; recompile with -Xdiags:verbose to get full output
20 errors
Thanks for help!
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Answer
Your code has way too many problem’s as listed in other answer, below is a version of code without compilation errors, but I have no idea what you are trying to do in code, And I am pretty sure whatever you are trying, you are not doing it right. Happy Learning!
import java.util.Scanner;
class Chiffrator {
public static void main(String args[]) {
Scanner input = new Scanner(System.in); // Initializing keyboard
// scanner, like arrays (Scanner
// [name] = new
// Scanner(System.in)
String initial_code; // Initializing the string into which the text will
// be entered
System.out.println("Enter initial code: ");
initial_code = input.next(); // Initializing input process, with syntax
// [string_name] = [scanner_name].next()
char letters[] = { 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j' };
int[] numbers = new int[9];
int i, j, k;
for (i = 0; i <= 9; i++) {
numbers[i] = i;
i++;
}
for (k = 0; k <= initial_code.length(); k++) { // .length() is a method!
if (initial_code.contains(numbers.toString()))
numbers[k] = letters[k];
else if (initial_code.contains(letters.toString()))
letters[k] = (char) numbers[k];
k++;
}
System.out.println("Your chiffred code is " + initial_code);
}
}