sort

[Camden]

i take from a file elements with readLine( ) and i want to sort them ignoring cases (they are words) and put them in a vector (not array).
what should I do? add them in the vector with .add() and then rearrange them and put them in a new vector? and how?
is this situation suitable for a stack use?
can anyone help plz

[staykovmarin]

You can read the words from a file like so, and put them in the array:

Code:

	BufferedReader reader = new BufferedReader(new FileReader("test.txt"));
	String s;
        // edit2: changed to StringBuilder. StringBuilder.append(String s) is way faster than String concatenation
	StringBuilder tmp = new StringBuilder();
	while ((s = reader.readLine()) !=null) {
		tmp.append(s.toLowerCase() + "\n");
	}
			
	String[] arr = tmp.toString().split("\n");

Then sort:

Code:

	java.util.Arrays.sort(arr);

[staykovmarin]

Then convert it to a Vector.

[staykovmarin]

Code:

		    Vector<String> v = new Vector<String>();
		    for (int i = 0; i < arr.length; i++) {
		    	v.add(arr[i]);
		    }

Java Forums » General Java » New To Java > spoonfeed

[Camden]

you are very rude young man.
any serious answer please?

[hardwired]

i take from a file elements with readLine( ) and i want to sort them ignoring cases (they are words) and put them in a vector (not array).
From staykovmarin's posts:

Code:

BufferedReader reader = new BufferedReader(new FileReader("test.txt"));
Vector<String> v = new Vector<String>();
String line;
while ((line = reader.readLine()) != null) {
    v.add(line);
}

what should I do? add them in the vector with .add() and then rearrange them and put them in a new vector? and how?
Vector implements the List interface which implements the Collection interface. Therefore you can use the Collections class to sort your Vector with a comparator that sorts the words with/in lower case. See the Comparator api. And see the "Sorting" section on this page Lesson: Algorithms in the Collections trail.

Code:

Collections.sort(v, your_Comparator);

is this situation suitable for a stack use
Maybe; depends on what you want to do.

[staykovmarin]

I would give up the fight if i were you. Reading is not one of Camden's strong points. Not to mention that if he put my two posts together, he had the exact same result, a Vector with all the information that he needs.

Lucky for him, at least this time he didnt get his posts deleted for refusing to put two and two together AND for attempting to insult me.

[Camden]

You insult yourself. And insulting is the easiest thing, especially when someone is hiding behind the screen.