CODEWITHSUNDEEP
javaarraysswingjframejtextarea
3.14ed_Piper
3.14ed_Piper

Reputation: 151

TextArea output from a List

I am having trouble with modifying output from a List (called "cds") inside a JTextArea (from JFrame)......

When I run displayButtonActionPerformed, it places all objects in the array into the JTextArea.

However, these objects are strung together with commas in one big list.... Is there any code which would remove the commas, and create a newline between each object.....

The array can be arbitrarily large, so simply doing a collections.size(0) then /n then collections.size(1) and then /n........will not work.

My code is as follows:

private void displayButtonActionPerformed(java.awt.event.ActionEvent evt) {                                              
    // sorts then displays entries in the array
    Collections.sort(cds, String.CASE_INSENSITIVE_ORDER);
    outputArea.setText(cds.toString());
}

The line in question is:

outputArea.setText(cds.toString());

This is what they DO look like in the JTextArea:

[Abbey Road -- Beatles, Alive -- Doors, Gimme Shelter -- Rolling Stones, Hey Jude -- Beatles, Staying Alive -- Beegees]

This is what they SHOULD look like in the JTextArea:

Abbey Road -- Beatles
Alive -- Doors
Gimme Shelter -- Rolling Stones
Hey Jude -- Beatles
Staying Alive -- Beegees

P.S., I'm not having trouble currently removing the brackets, but if anyone knew a simple way, that'd be great too.

Upvotes: 0

Views: 3466

Answers (2)

Igeryu
Igeryu

Reputation: 11

In order to achieve the results you want, you can create a class or function that takes an array as an argument and prints out the items within it in the format you like:

....
public static String printArray (String[] textArray) {
    String output = "";
    for (String s : textArray) {
        output += s + '\n';
    }
    return output;
}
...
private void displayButtonActionPerformed(java.awt.event.ActionEvent evt) {                                              
    // sorts then displays entries in the array
    Collections.sort(cds, String.CASE_INSENSITIVE_ORDER);

    outputArea.setText(printArray(cds));  //Change this line
}

After adding a similar method to the one I have shown, change the last line in your displayButtonActionPerformed() method as shown.

I have tested the printArray() method in a similar example.

Upvotes: 0

Yassin Hajaj
Yassin Hajaj

Reputation: 22005

Use append instead of setText and a loop

Solution

for (Object o : cds){
    outputArea.append(o + "\n");
}

Output

enter image description here

Upvotes: 2

Related Questions