import javax.swing.*;
import java.awt.event.*;
import java.awt.BorderLayout;

public class JTextAreaTest
		extends JFrame implements ActionListener
{
	private JButton theButton;
 	private JTextArea theTextArea;
  	private JTextField theTextField;

    public JTextAreaTest()
    {
		super("The Frame");
        theButton = new JButton("Add Text");
        theButton.addActionListener(this);
        theTextField = new JTextField(20);
        theTextField.setActionCommand("TheTextField");
        theTextField.addActionListener(this);
        theTextArea = new JTextArea("",15,30);

        this.getContentPane().setLayout(new BorderLayout());
        this.getContentPane().add(theButton,BorderLayout.SOUTH);
        this.getContentPane().add(theTextField,BorderLayout.CENTER);
        this.getContentPane().add(theTextArea,BorderLayout.NORTH);
        this.pack();
        this.show();
    }

    public void actionPerformed(ActionEvent ae)
    {
        String quote = """;
	theTextArea.setText(theTextArea.getText()
  	    + quote + theTextField.getText() + quote );
    }

    public static void main(String[] args)
    {
        JTextAreaTest JTextAreaTest = new JTextAreaTest();
    }
}

For example for a single quote:


String s = """;

And for a double quote:


String s = """";

Finally the same applies for an apostrophe:


String s = "\'";

Good Luck.