Question

Please let me state that this is for a homework assignment and any help would be appreciated.

I am am writing a program using Eclipse (Juno) that creates a frame, places a ball in the top of the frame and places a row of buttons on the ‘south’ of the border frame. The issue I am having is in the class that adds the buttons, called Btns.java, I am receiving some errors.

Error 1: add cannot be resolved to a variable
Error 2: Constructor call must be the first statement in a constructor
Error 3: Syntax error on token “.”, super expected after this token

The code looks correct to me never the less.

The code for the Btns class is below.

import java.awt.BorderLayout;
import java.awt.FlowLayout;
import java.awt.*;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;

public class  Btns extends JFrame
{
    public Btns()
    {
        JButton jbtL = new JButton("Left");
        JButton jbtR = new JButton("Right");
        JButton jbtU = new JButton("Up");
        JButton jbtD = new JButton("Down");
        JButton jbtRd = new JButton("Red");
        JButton jbtG = new JButton("Green");
        add.(jbtL);
        add.(jbtR);
        add.(jbtU);
        add.(jbtD);
        add.(jbtRd);
        add.(jbtG);

    }

 }

Lab2.java Code:

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

public class Lab2 extends JFrame { 

        public Lab2()
        {
        setLayout(new BorderLayout());

        add(new Ball(), BorderLayout.CENTER);
        add(new Btns(), BorderLayout.SOUTH);
        }



public static void main (String[] args) { 

    Lab2 frame = new Lab2();
    frame.setTitle("Move The Ball");
    frame.setSize(450, 700);
    frame.setLocationRelativeTo(null);
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    frame.setVisible(true);

    }   
}

Answer 1

You have extra dots here before the method parenthesis:

Replace:

add.(jbtL);
add.(jbtR);
add.(jbtU);
 ...

with

add(jbtL);
add(jbtR);
add(jbtU);
...