Thread: Methods

I have made a Method the problem is that I can't get it to work when I place it in my project.
Either written the Method wrong or placing it in the wrong place in the project.
My Method

       void getSecond(int secondNum){
        displayTable.setText("\n"); //Clear the displayTable 
        int firstNum, answerNum;
            for (firstNum = 1; firstNum <=12; firstNum ++){
                answerNum = firstNum * secondNum;
                displayTable.append(firstNum + " x " + secondNum + " = " + answerNum +"\n");
             }

My Project

import javax.swing.*;
import java.awt.Color;
import java.awt.Font;
import javax.swing.BorderFactory; 
import javax.swing.border.Border;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
 
public class MyTables
{
 
	public static void main(String[] args) 
	{
		JFrame frame = new JFrame("Tables"); // Creating instance of JFrame
        frame.setSize(800, 600); // Setting the width and height of frame
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); 
		JPanel panel = new JPanel(); //Creating panel. Inside panels we can add textfields, buttons and other components.
		panel.setBorder(BorderFactory.createLineBorder(Color.RED));
        frame.add(panel); // Add panel to frame
        placeComponents(panel);  //Call user defined method for adding components to the panel.
		frame.setVisible(true); // Setting the frame visibility to true
    }
 
	private static void placeComponents(JPanel panel) 
	{
			panel.setLayout(null);
			JTextArea displayTable = new JTextArea("Text Area");
			displayTable.setEditable(false);
			displayTable.setColumns(20);
			displayTable.setFont(new Font("Times New Roman", 1, 14));
			displayTable.setLineWrap(true);
			displayTable.setRows(14);
			displayTable.setWrapStyleWord(true);
			displayTable.setBounds(200,20,230,260); 
			displayTable.setBorder(BorderFactory.createLineBorder(Color.GREEN));
			displayTable.setMaximumSize(new java.awt.Dimension(5, 22));
			panel.add(displayTable);
 
			JLabel userLabel = new JLabel("Enter a Number");  // Creating JLabel
			userLabel.setHorizontalAlignment(SwingConstants.CENTER);
			userLabel.setFont(new Font("Verdana", Font.ITALIC, 16)); //set font
			userLabel.setBounds(10,20,180,25); // Specifies the location and size of component. (x,y,x1,y1)
			userLabel.setBorder(BorderFactory.createLineBorder(Color.BLUE));	
			panel.add(userLabel); // Add Label to panel
 
			JTextField userText = new JTextField(20); //Create a textfield
			userText.setBounds(10,50,165,25);
			panel.add(userText); // Add TextField to pane
 
			JButton loginButton = new JButton("Enter"); // Create button
			loginButton.setBounds(10, 80, 80, 25);
			panel.add(loginButton); // Add loginButton to panel
 
 
		loginButton.addActionListener(new ActionListener()
		{
			public void actionPerformed(ActionEvent e)
				{
					//getSecond(6);
					displayTable.setText("Button Pressed");
				}
 
		});
    }		
}

First two things I notice in your code:

public void actionPerformed(ActionEvent e)
{
//getSecond(6);
displayTable.setText("Button Pressed");
}

1. getSecond(6) is commented out but I'm sure this was done on purpose.
2. setText(...) will delete the previous contents of the displayTable and replace it with the given string.

Try removing the setText(...) and commenting out getSecond(6)