Need java help on reading intger elements from file to array list

[needhelp123]

Hi all,

any body could help in reading integer values from .txt to array list and after transferring the dates from array list to another .txt file

there should be two files....

[prometheuzz]

Hi all,

any body could help in reading integer values from .txt to array list and after transferring the dates from array list to another .txt file

there should be two files....

Sure, with what part of the assignment are you having trouble with?

[nomad]

Hi all,

any body could help in reading integer values from .txt to array list and after transferring the dates from array list to another .txt file

there should be two files....

Question you need to ask yourself
How do you want to retreive your text files. by a scanner or static.
how do you want to output your t.txt file.
How many data types do you need.
Where do you want to store the output txt files
nomad

[needhelp123]

Sure, with what part of the assignment are you having trouble with?

the following information is enought i hope...
* Create a file called Unsorted.txt.
* Store the Unsorted values in this file.
* Read the values from the Unsorted.txt file.
* Sort the values
* Store the sorted values in new file. Name it as Sorted.txt

Implement this only for the following algorithms.

Bubble sort

[needhelp123]

Question you need to ask yourself
How do you want to retreive your text files. by a scanner or static.
how do you want to output your t.txt file.
How many data types do you need.
Where do you want to store the output txt files
nomad

I hope following information is enough....

* Create a file called Unsorted.txt.
* Store the Unsorted values in this file.
* Read the values from the Unsorted.txt file.
* Sort the values
* Store the sorted values in new file. Name it as Sorted.txt

Implement this only for the following algorithms.

Bubble sort

[nomad]

I hope following information is enough....

* Create a file called Unsorted.txt.
* Store the Unsorted values in this file.
* Read the values from the Unsorted.txt file.
* Sort the values
* Store the sorted values in new file. Name it as Sorted.txt

Implement this only for the following algorithms.

Bubble sort

Have you read how to I/O files yet and do you know how to create a Arraylist?

nomad

[prometheuzz]

the following information is enought i hope...
* Create a file called Unsorted.txt.
* Store the Unsorted values in this file.
* Read the values from the Unsorted.txt file.
* Sort the values
* Store the sorted values in new file. Name it as Sorted.txt

Implement this only for the following algorithms.

Bubble sort

What I meant to say with my post is this: if you don't have any idea where (or how) to start coding *something*, then I cannot help you and you should either hire a private tutor or have a talk with your teacher (I don't mean to put you down!).

But, if you have coded something up and you're getting compiler/runtime errors you don't understand what they mean: post your code AND errors here and explain what it is you're having a hard time with: I'll try to help you.

Good luck.

[nomad]

I hope following information is enough....

* Create a file called Unsorted.txt.
* Store the Unsorted values in this file.
* Read the values from the Unsorted.txt file.
* Sort the values
* Store the sorted values in new file. Name it as Sorted.txt

Implement this only for the following algorithms.

Bubble sort

like prometheuzz we can not help you without see some form of coding.
I'm also new to Java and I willing to help you learn Java from an entry level view points

good luck

[needhelp123]

Have you read how to I/O files yet and do you know how to create a Arraylist?

nomad

i know all the things....
to read and create array list
and even i have the program tooo

i need a code where i can transfer data from text to array list....
i am not aware of this little bit...

if i kno this so i can implement the rest...

[needhelp123]

What I meant to say with my post is this: if you don't have any idea where (or how) to start coding *something*, then I cannot help you and you should either hire a private tutor or have a talk with your teacher (I don't mean to put you down!).

But, if you have coded something up and you're getting compiler/runtime errors you don't understand what they mean: post your code AND errors here and explain what it is you're having a hard time with: I'll try to help you.

Good luck.

hi prometheuzz
thanks for your concern... i have the program code just i need to know about how to transfer integer data from text file to array list...

[nomad]

i know all the things....
to read and create array list
and even i have the program tooo

i need a code where i can transfer data from text to array list....
i am not aware of this little bit...

if i kno this so i can implement the rest...

if that is the case then you need to use the get()method and set() methods for your data types.

nomad

[prometheuzz]

hi prometheuzz
thanks for your concern... i have the program code just i need to know about how to transfer integer data from text file to array list...

Have a look at Sun's I/O tutorial:

http://java.sun.com/docs/books/tutorial/essential/io/scanning.html

[needhelp123]

if that is the case then you need to use the get()method and set() methods for your data types.

nomad

this is my java program


[CODE=java] public class BubbleSort {

int[] bsArrays = new int[5];
int i; //indexing for array(outer loop counter)
int j; //indexing for array*(inner loop counter)


/**
* Adds element into an array
* sorts the array and print final value...
*/
private void setBubblesort() {

// Insert elements into an array
bsArrays[0] = 20;
bsArrays[1] = 10;
bsArrays[2] = 50;
bsArrays[3] = 100;
bsArrays[4] = 05;

int temp = 0; //variable to store value during manipulation

System.out.prin tln("Bubble Sort");
System.out.prin tln(" ");
System.out.prin tln(" ");
System.out.prin tln("Data before Soring ");
System.out.prin tln("********** ****** ");
for (int val = 0; val < 5; val ++) {
System.out.prin tln("Value at index" + val + " = " + bsArrays[val]);
}

//swaping an elemens
for (i = 0; i < 4; i++ ) {
for (j = i + 1; j < 5; j ++) {
if (bsArrays[i] > bsArrays[j]) {
temp = bsArrays [ i ];
bsArrays[i] = bsArrays[j];
bsArrays[j] = temp;
}
}
}

//output: final sorted elements in ana array
System.out.prin tln(" ");
System.out.prin tln(" ");
System.out.prin tln(" After Sorting " );
System.out.prin tln(" *************** * ");
for (int fval = 0; fval < 5; fval ++) {
System.out.prin tln("Value at index" + fval + " = " +
bsArrays[fval]);
}
}

/**
* The main method illustrates the use of a Bubble sort
* for small array
*/
public static void main(String str[]) {
BubbleSort acc = new BubbleSort();
acc.setBubbleso rt();
}
}
[/CODE]

here i have inserted elements directly in the program.. in spite of that i need to get those elements from text file what i mentioned before...

[needhelp123]

Have a look at Sun's I/O tutorial:
http://java.sun.com/docs/books/tutor.../scanning.html

thank you...
it might help in implenting code if my TL... sujst to use scanner

[prometheuzz]

thank you...
it might help in implenting code if my TL... sujst to use scanner

You can or can't use the Scanner class?

Anyway, Scanner examples can be found in the tutorial I posted, and here's an example of how to do it without the Scanner class:
[CODE=java]import java.io.*;

public class Main {
public static void main(String[] args) throws IOException {
BufferedReader buffer =
new BufferedReader( new FileReader("Mai n.java"));
String lineOfText;
while((lineOfTe xt = buffer.readLine ()) != null) {
System.out.prin tln("> "+lineOfTex t);
}
buffer.close();
}
}[/CODE]
Have a look at the java.lang.Integ er class how to parse a String to a numerical value.

Good luck.