Rotate vowels in java..,, from a .txt file?

Question

Pls help me
following is my exercise to do

Exercise 2 - Rotate vowels
Copy a file named "history" to an output file named "history.copy" rotating the lower-case vowels. That is, change all occurrences of
'a' to 'e'
'e' to 'i'
'i' to 'o'
'o' to 'u'
'u' to 'a'

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Typical input file

In an age when acronyms were popular, the Manchester Mark I was sometimes referred to as MADM (Manchester Automatic Digital Machine) or MUC (Manchester University Computer).


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Typical output file

In en egi whin ecrunyms wiri pupaler, thi Menchistir Merk I wes
sumitomis rifirrid tu es MADM (Menchistir Aatumetoc Dogotel Mechoni) ur MUC (Menchistir Unovirsoty Cumpatir).

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Answer 1

Will need a bit of tweaking for case handling...and u can use any collection u want...i love hashmaps :)

Hope this helps



HashMap vowelMap = new HashMap();

vowelMap.put("a","e");

vowelMap.put("e","i");

vowelMap.put("i","o");

vowelMap.put("o","u");

vowelMap.put("u","a");



try{

File file = new File("C:\\Test.txt");

FileInputStream fis = new FileInputStream(file);

StringBuffer buf = new StringBuffer();

int n = 0;

while ((n = fis.read()) != -1){

char c = (char)n;

String s = Character.toString(c);

if(vowelMap.containsKey(s)){

buf.append(vowelMap.get(s));

}else{

buf.append(s);

}

}

System.out.println(buf.toString());

}catch(FileNotFoundException fnfe){

System.err.println("FileNotFoundException: " + fnfe.getMessage());

}catch(IOException ioe){

System.err.println("IOException: " + ioe.getMessage());

}

}

Answer 2

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Answer 3

didn't understand any question neither this nor the other one by u