Java jtextarea multiline help

One problem I encounter is that I have two jtext areas, and I need to add a project list for them

public void setIncludeAndExclude(ArrayList<JCombo@R_853_2419@> @R_853_2419@es){
    String in = "",ex = "";
    String[] inSplit,exSplit;


    boolean[] include = new boolean[@R_853_2419@es.get(0).getModel().getSize()-1];
    for(int i = 0; i < @R_853_2419@es.size(); i ++){
        if(@R_853_2419@es.get(i).getSelectedIndex() != 0){
            include[@R_853_2419@es.get(i).getSelectedIndex() -1] = true;
        }
    }

    for(int i = 0; i < include.length; i ++){
        if(include[i]){
            //numToItem is a method that turns an int into a string e.g. 1 = "Acesss Doors"
            in += (numToItem(i+1)+ ",");
        }else{
            ex += (numToItem(i+1)+ ",");
        }
    }

    //take off the last comma
    in = in.substring(0,in.lastIndexOf(","));
    ex = ex.substring(0,ex.lastIndexOf(","));

    //get how many lines there should be        
    inSplit = new String[(in.length()/100) +1];
    exSplit = new String[(ex.length()/100) +1];

    String temp;        
    int istart = 0,iend = Math.min(100,in.length()),estart = 0,eend = Math.min(100,ex.length());

    for(int i = 0; i < inSplit.length; i ++){
        try{
            temp = in.substring(istart,iend);
            int Iindex = temp.lastIndexOf(",");
            temp = ex.substring(estart,eend);
            int Eindex = temp.lastIndexOf(",");
            inSplit[i] = in.substring(istart,Iindex);
            exSplit[i] = ex.substring(estart,Eindex);
            istart = Iindex; iend = Math.min(iend + 100,in.length());
            estart = Eindex; eend = Math.min(eend + 100,ex.length());
        }catch(Exception e){
            e.printStackTrace();
        }
    }

    //reset in and ex to ""     
    in = ""; ex = "";

    //set in and ex to the new string with newline characters
    for(int i = 0; i < inSplit.length; i ++){
        in += inSplit[i] + "\n";
        ex += exSplit[i] + "\n";
    }

    //set the text of the JTextAreas
    Include.setText(in);
    Exclude.setText(ex);

}

Any help I can make a difference or change will be appreciated

Solution

Jtextarea has setlinewrap (...) and setwrapstyleword (...) methods Maybe all you need to do is set them to true in the jtextarea settings

One criticism: your code is hard to explain because you don't specify which variables are jtextareas (I guess "include" and "exclude"), and don't comment on what is done Please write down your question here. Our idea is that we know nothing about your code and can't read it The clearer your question, the easier it is usually to answer thank you.