reading text into an array in java

[chris evans]

hi, could sm1 please show me code that can sort and read text/string character by character into an array i.e identify integers and characters and put them in separate fields in an array e.g 2 integers then 3 characters like 23 IAM, 12 Her, or 32 MALE. it shuld also reject strings that dont fall into that order e.g 2F 32FL, Male22 or IF23

[NormR1]

I don't know that sm1 is around today. Are you sure he/she is on this forum?

[Ewald Horn]

Hi Chris,

you might want to take the time to properly format your question. It sounds like a homework assignment, so try to break it down into steps first.

For example:

You say that you have to place data into an array, integers or Strings. Are you going to be using a single array, or will you be using two arrays, one for the integers and one for the Strings. This is important, as a normal array can only store one type at a time, so either String or integer. If you really need to use a single array, then you have to create an object that you will be placing in the array. This object will then contain both an integer and a String.

My policy on homework questions is that if I do not see someone showing actual code where they have really tried to solve the problem, I won't answer. I think it's probably the same for most folks on this forum, so show us that you have put in the effort and someone will surely help you.

Regards
Ewald

[chris evans]

ok. the segment of code that does the printing of the file looks like this:

    if (parsefilename.isEmpty())
        JOptionPane.showMessageDialog(null,"Please enter name to save file","Missing filename", JOptionPane.INFORMATION_MESSAGE);
    else{
        try{

        //txtparse1.setText(textOut);

        out2 = new FileOutputStream(txtparsefile.getText().concat("_parsefile.txt"));//save as text file
        p2 = new PrintStream(out2);

        textOut2 = textOut;
        txtparse1.setText(textOut2);

        p2.print(textOut);
        }
        catch(Exception e){
            JOptionPane.showMessageDialog(null, "Error writing to file", "File write error", JOptionPane.INFORMATION_MESSAGE);
        }

and the output looks like this;

Hello worldest
Hello world
Hello world
Hello world
Hello world
Hello world
" Hello world!! "
Oya!
Yes!
important Yellow
21 M 23415 GOOD
20 F 51433 BAD
23 F 31532 TRUE
20 M 54143 BAD

1) i want to select the last 4 lines of output like "21 M 23145 GOOD" and reject the other text like "Hello world"

2) i want to store the selected text into a 4 dimensional array that stores each part of the text separately e.g [20] [M] [54143] [BAD]

somebody help, please

[NormR1]

want to select the last 4 lines of output

What is the criteria for selecting one line vs another?
Starts with a number? Has 4 words/parts? ???

tore the selected text into a 4 dimensional array

Thats a lot of dimensions? Your example with strings for indexes doesn't make sense.
Could you describe what you mean better?
A 4 dimensional array would be: String[][][][] fourDims
then you assign it values: fourDims[idx1][idx2][idx3][idx4] = "20";
Would a two dim array work? The first dim would be the line number.
The second dim would be the words in the line:
twoDim[lineNbr][0] = "20"
twoDim[lineNbr][1] = "M'
twoDim[lineNbr][2] = "54143];
etc