CODEWITHSUNDEEP
javaswingarraylistjeditorpane
Test_Subject
Test_Subject

Reputation: 59

JEditorPane - setText from ArrayList<String> contents?

I have read through the JEditorPane Docs, from what I can understand you simply need to editorpane.setText(String value); however I am quite new to java and this solution does not work with my code. I think I am missing something obvious but completely out of ideas.

I have created a new tab with this class that extends JEditorPane, this class is designed to open the contents of the file, put them on an array, reverse the array (so latest entry is on the top) then display this list in the JEditorPane (using JeditorPane because I need to make the save url's into hyperlinks),

public class HistoryPane extends JEditorPane{

ArrayList<String> historyToSort = new ArrayList<String>();

public HistoryPane(){
    setEditable(false); 
    historySort();
}


public void historySort() {

    try (BufferedReader reader = new BufferedReader(new FileReader("BrowserHistory.txt")))
    {

        String currentLine;
        String newLine = new String("\n");

        while ((currentLine = reader.readLine()) != null) {
            historyToSort.add(currentLine + newLine);

        }

    } catch (IOException e) {
        e.printStackTrace();
    } 
    Collections.reverse(historyToSort);
    System.out.println(historyToSort);  
    }

{
}

private void displayHistory(){
    String sorted = historyToSort.toString();
*****   HistoryPane.setText(String sorted); <<<------ PROBLEM SYNTAX.*****

}
}

I have tried multiple different entries into the setText() parenthesis with no luck. What am I missing? Thank You.

NOTE:

This class won't compile because it is reliant on another class (I can't paste all of it) but this code sits within a tabbed pane created by my main class:

Error Message:

Exception in thread "AWT-EventQueue-0" java.lang.Error: Unresolved compilation problems: Syntax error on token "setText", Identifier expected after this token Return type for the method is missing This method requires a body instead of a semicolon

Upvotes: 1

Views: 1503

Answers (1)

JB Nizet
JB Nizet

Reputation: 692071

OK, despite the fact that you haven't read the error message, it seems you're really a newbie, so I'll help. 

HistoryPane.setText(String sorted);

The above isn't valid Java. A method invocation takes a list of arguments, without a type.

HistoryPane.setText(sorted);

Now that is a valid method invocation. But it tries to invoke a static method called setText() of the class HistoryPane. What you want is to invoke the instance method setText() on the current object. So the valid syntax is

this.setText(sorted);

or simply

setText(sorted);

That should solve this particular compilation error. Don't try to run your app before every compilation error, listed in the Problems view of Eclipse, is fixed.

Note that the above line won't do what you want it to do, but I'll let you investigate what you should do instead.

My advice: don't try using Swing, which is quite a complex beast, if you don't even know how to call a method yet. Start with very simple Java exercises, not involving any GUI, until you're familiar with the Java syntax, and understand how to read, understand and fix basic compilation problems.

Upvotes: 1

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