Question

JAVA PROGRAMMING HELP

Answer 1

thanks im gonna post question now oops lol

Answer 2

I am making a Java program that translates from Morse code to English and vice versa.
However, only English to Morse code works, not the other way. The program Compiles.. but doesnt exactly work.

Answer 3

http://screencast-o-matic.com/watch/c21qbpnCvU

Answer 4

Do you know Java programming?

Answer 5

show me code

Answer 6

And I know very basics in a lot of random languages, I usually program everything on Python and Matlab, dont deal with heavy syntax problems usually with my kind of questions

Answer 7

how are your parsing your input

Answer 8

@aajugdar java programming

Answer 9

heres the file

Answer 10

thanks for coming @aajugdar and @dan815

Answer 11

@dark_riddles we need your professional help
@ganeshie8
These guys program for a living

Answer 12

Okay David some qusetions for you

Answer 13

I need to redownload netbeans right now to open java files again

Answer 14

NO. get jdk

Answer 15

jdk much better
@ganeshie8 thanks for coming 2 help

Answer 16

tell me what you are basically doing for going from morse to english

Answer 17

You have | separting words

Answer 18

yes...

Answer 19

How do you know where the letter is ending

Answer 20

there are spaces between letters and | between words

Answer 21

okay

Answer 22

so it would be like
m y | n a m e | i s | d a v i d

Answer 23

and morse with be like
-.-- Space .., space....- | .... right?

Answer 24

i think...

Answer 25

okay well you can split for every | in the input

Answer 26

then split for ever space

Answer 27

and do a loop up for each string now

Answer 28

yay i reported aadjugar because his post about whatever, and a mod deleted it yay

Answer 29

hm im not sure what ur sayin

Answer 30

I'll upload new screencast of my windows command prompt and stuff.
u should use windows command prompt and jdk for java its easier and better

Answer 31

are you also goin to put in sound for the morse code?

Answer 32

It would be cool if you made a program that was interpreting the sound and sending the morse code sounds

Answer 33

lemme see who else does java..

Answer 34

@Kainui @wio

Answer 35

```
public class morsecode
{
public static void main( String [] args )
{

String [] referenceMorse = {".-","-...", "-.-.","-..",".","..-.","--.","....","..",".---","-.-",".-..","--","-.","---",".--.","--.-",".-.","...","-","..-","...-",".--","-..-","-.--","--..",".----","..---","...--","....-","-----","-....","--...","---..","----.","-----","|"};
String [] referenceEnglish = {"a","b","c","d","e","f","g","h","i","j","k","l","m","n","o","p","q","r","s","t","u","v","w","x","y","z","1","2","3","4","5","6","7","8","9","0"," "};
//all the reference translations

String whichone = Input.getString("If you would like to translate English to Morse, type in 'Morse'. \nIf you would like to translate Morse to English, type in 'English'. ");

if ( whichone.equals("Morse") )
{
toMorse(referenceMorse , referenceEnglish);
}

if ( whichone.equals("English") )
{
toEnglish(referenceMorse , referenceEnglish);
}


}

public static void toMorse( String [] referenceMorse , String [] referenceEnglish )
{
String englishinput = Input.getString("Enter the English characters you would like to translate.");
System.out.println("\n" + "Your input was: " + englishinput );
System.out.println( );

String english = englishinput.toLowerCase();
int size = english.length();

System.out.println("In Morse, this is:");

for (int i = 0 ; i < size ; i ++ )
{
String l;

if( i == (size - 1) )
{
l = english.substring(i);
}
else
{
l = english.substring(i,i+1);
}


for (int j = 0 ; j < 37 ; j++ )
{

if ( l.equals ( referenceEnglish [j]))
{
System.out.print( referenceMorse [j] + " ");
}

}
}

System.out.println();
}

public static void toEnglish( String [] referenceMorse , String [] referenceEnglish )
{
String morse = Input.getString("Enter the Morse characters you would like to translate, putting vertical bars (|) between words.");
System.out.println("\n" + "Your input was: " + morse );
System.out.println( );

int size = morse.length();
int numofSpaces = 0 ;

System.out.println("In English, this is:");

int count [] = new int [100];

for(int i = 0 ; i < size ; i++ )
{
String s;
int r = 0;

if ( i == size - 1 )
{
s = morse.substring(i);
}
else
{
s = morse.substring(i, i +1 );
}

if ( s.equals (" "))
{
numofSpaces++;
r ++ ;
}
else
{
count [r] ++;
}

}

for(int i = 0 ; i <= numofSpaces ; i ++ )
{
String word [] = new String [(count [i])];
String l;

for(int j = 0 ; j < count [i] ; j ++ )
{
if ( j == (count[i] - 1) )
{
l = morse.substring(j);
}
else
{
l = morse.substring(j, j +1 );
}

word [j] = l ;

}

for (int k = 0 ; k < 37 ; k++ )
{

if ( word .equals ( referenceMorse [k]))
{
System.out.println ( referenceEnglish [k] + " ");
}
}
}
}
}
```

Answer 36

Do you know how functions work?

Answer 37

wio will own this question

Answer 38

yes sorry i was gone for a while making vid so u guys can see my problem

Answer 39

You can use `String[] parts = morse.split(' ');` to split a string `morse` up by the spaces.

Answer 40

For example:
```
String[] words = "This is a bunch of words".split(' ');
for (int i = 0; i < words.length; i++) {
System.out.println(words[i]);
}
```
Then you will have output:
```
This
is
a
bunch
of
words
```

Answer 41

thanks
here are the instructions

Answer 42

@dan815 no i wont make sounds lol sorry
look
http://screencast-o-matic.com/watch/c21qrrnCyj

Answer 43

can u here in my vid? im not sure because my sound is muted, but i wanna know

Answer 44

Aww that would have been fun :)

Answer 45

wow everyone is afk this is... :( :P

Answer 46

hold on, I'm looking at your code.

Answer 47

Ok thanks

Answer 48

@Dark_Riddles Please help java programming

Answer 49

ok, I got no idea how your code is supposed to work.

Answer 50

Why is my program not working? Is there a way to make it work without changing it a lot?

Answer 51

Lol

Answer 52

You should use: `String[] morseLetters = morse.split(' ');`

Answer 53

Then go through each letter, looking it up, and printing it out.

Answer 54

ok thanks

Answer 55

Sorry, can't use sound right now.

Answer 56

what would i delete and where would i put the string thing

Answer 57

That's the fun of programming. =P

Answer 58

you declared `word` as an array, but you're comparing it against a character

Answer 59

Consider
```
String morseLetters = morse.split(' ');
for (int i = 0; i < morseLetters.length(); i++){
String morseLetter = morseLetters[i];
// try to find morseLetter in the morese reference here.
}

```

Answer 60

can u edit my program and send it back because im getting a little confused.

Answer 61

what I wrote should completely replace your 'toEnglish' function.

Answer 62

ok. from there to the bottom?

Answer 63

Yes

Answer 64

thanks let me try

Answer 65

except for the print statements

Answer 66

nope
tell me what part of the code you don't get.

Answer 67

theres an error message....

Answer 68

no, what I mean is... do you understand what:
```
String morseLetters = morse.split(' ');
for (int i = 0; i < morseLetters.length(); i++){
String morseLetter = morseLetters[i];
// try to find morseLetter in the morese reference here.
}
```

does?

Answer 69

okay, how will you fill it out?

Answer 70

what?

Answer 71

`// try to find morseLetter in the morse reference here.`

This part needs to be replaced with other code.

Answer 72

i have no idea.

Answer 73

GAAHHH @WIO HELP!

Answer 74

@iambatman help me

Answer 75

.... no you need to go through the morse reverence array, then check if the the entry equals the morse letter.

Answer 76

Did you write any of the code you had originally...?

Answer 77

finally hi dan

Answer 78

Yes? What can I do, i dont know Java syntax

Answer 79

wio has you covered

Answer 80

David... what is the problem? You are not explaining where you are stuck.

Answer 81

Did you come just to get an answer?

Answer 82

@DavidUsa There's really only one way to learn code, and that is to understand it. I can help you, but I wouldn't be able to tell you more than @wio is saying. You have to ask questions about what you are having trouble with. If you don't understand the entire program, then start from the beginning and follow it through.

Start at the main method and follow through your code imagining what should happen at every line. Does it do what you think it does? Play with it to make sure. Make smaller programs to test only certain parts of code you don't understand completely to make sure. Try to see if messes up like you expect. Play with it and push the boundaries on what you think things do. Yes, you are not as close as you think you are to finishing this program. But that's ok; if you learn things now then more programming will become easier for you in the future and be much faster.

You have to walk before you can run.

Answer 83

David, you aren't asking a single question. That is why you aren't learning.

Answer 84

wait what i was afk what happen

Answer 85

I was bored and thought I'd help. But I only rewrote your program so that it looked cleaner. English to Morse Code works, but not the other way around. I can help you only if you ask good questions. I left some stuff commented out in the code. Try to look at what happens when you uncomment the code to see what the program is doing at particular times. Those are actual things I used to help me trouble shoot the program as I was making it.

```
import java.util.Scanner;

public class MorseCodeTranslator {
static String[] Morse = { ".-", "-...", "-.-.", "-..", ".", "..-.", "--.",
"....", "..", ".---", "-.-", ".-..", "--", "-.", "---", ".--.",
"--.-", ".-.", "...", "-", "..-", "...-", ".--", "-..-", "-.--",
"--..", ".----", "..---", "...--", "....-", "-----", "-....",
"--...", "---..", "----.", "-----", "|" };
static String[] English = { "a", "b", "c", "d", "e", "f", "g", "h", "i",
"j", "k", "l", "m", "n", "o", "p", "q", "r", "s", "t", "u", "v",
"w", "x", "y", "z", "1", "2", "3", "4", "5", "6", "7", "8", "9",
"0", " " };
public StringBuilder sb;

public static void main(String[] args) {
MorseCodeTranslator mct = new MorseCodeTranslator();
mct.sb = new StringBuilder();
Scanner s = new Scanner(System.in);
System.out.println("Type your message in English or Morse Code.");
String text = s.nextLine();
if (text.startsWith(".") || text.startsWith("-")) {
text = mct.morseToEnglish(text);
} else {
text = mct.englishToMorse(text);
}
System.out.println("Translated message:");
System.out.println(text);
s.close();
}

private String englishToMorse(String text) {
String[] letters = text.split("");
for (int i = 0; i < letters.length; i++) {
for (int j = 0; j < English.length; j++) {
// System.out.println(letters[i] + " " + English[j]);
if (letters[i].equals(English[j])) {
sb.append(Morse[j] + " ");
// System.out.println(sb.toString());
continue;
}
}
}
return sb.toString();
}

private String morseToEnglish(String text) {
// Figure it out, I'll help only if you ask good questions.
return text;
}

}
```

The only part of this code that needs to be finished is the final method morseToEnglish. It is very similar to the englishToMorse method by design so that you can do similar things to help you understand. I will answer questions about the individual functionality of lines of code only.

Answer 86

One thing to consider doing is an `indexOf` method for finding stuff in arrays.
```
public int indexOf(Object[] array, Object item){
for (int i = 0; i < array.length; i++) {
if (item.equals(array[i])) {
return i;
}
}
return -1;
}
```

Answer 87

Not sure if java uses `.lenth()` or just `.length`. My guess is `.length()`.

Answer 88

hey! im back.

Answer 89

wait let me get caught up on this, i was at dinner

Answer 90

@wio Thanks, in Java I believe .length for arrays but .length() for array lists.

Answer 91

@Kainui thanks i tested it it does the same thing my program does. do u want to use twiddla to comunicate or another website or stay here?

Answer 92

This site is fine, I am not going to be coming and going since I'm busy doing other things right now.

Answer 93

are you using notepad with windows command prompt or are you using netbeans or java eclipse? i am using notepad with command prompt to compile and run my java files

Answer 94

@ganeshie8 HELP ME JAVA PROGRAMMING

Answer 95

I use eclipse for my IDE, but I've used notepad++ a little as well. I've made a few programs with netbeans since that's the IDE they have at the library computers at my university, but I didn't get too much into it.

I just got eclipse because that's generally what people use who are developing apps for android in Java and I just started teaching myself Java this past winter.