Button Click - Text Area Cannot Be Resolved Or Is Not A Field

In my application, some text should be added to a text area in response to a click on a button. So as an action listener to this class, I made another class which implements the ActionListener.

Inside this class, I have obtained the text which I want to be added to the text area. But the text area is in another class and for the action listener I wrote another class.

Now the problem is that when I try to add the text to the text area by the following line of code, it says that textArea_1 can not be resolved or is not a field.

Java Code:

ParentPanel.textArea_1.setText("Name:"+ncrarray[0]+"
Code:"+ncrarray[1]+"
Rank:"+ncrarray[2]); mh_sh_highlight_all('java'); What should I do about it?

Even if I try to write a method like the following in the class in which the text area is created, it gives the same error.

Java Code:

public void printTextArea(String text) {
textArea_1.setText(text);
} mh_sh_highlight_all('java');

The text area is present inside a constructor of the class. I am writing the method outside the constructor (ofcourse).