Java错误：类型不兼容：LinkedList<diff> 不能转换成字符串</diff>

Question

Hello I need help with this error, thank you in advance for your time and consideration

In the this.txt_absent.setText(diff); line is where the error appears, I want to show the diff in a JTextArea

This is my code: (It is an ActionPerformed JButton )

    private void compareActionPerformed(java.awt.event.ActionEvent evt) {                                        
    diff_match_patch dmp = new diff_match_patch();
   
    LinkedList <diff_match_patch.Diff> diff = dmp.diff_main(txt_guide.getText() , txt_result.getText());
    dmp.diff_cleanupSemantic(diff); 
    
    this.txt_absent.setText(diff);
    } 

Answer 1

JTextArea does not accept LinkedList instance in setText method.

You need to convert the linked list to appropriate string in any convenient way.

The simplest way can be to call LinkedList::toString :

this.txt_absent.setText(diff.toString());

Or it is possible to join the elements in the linked list with "\n" delimiter providing that LinkedList implements Iterable :

this.txt_absent.setText(String.join("\n", diff));

Or implement a custom method to build a string from the linked list.