Java swing window builder : Jframe resize and setsize problems

Question

Please help ! I have three problems:

1. The Jframe can't resize.
2. How can I make the frame 100% fit in the design tab ?
3. How can I avoid the following items in the picture to be cropped

import java.awt.EventQueue;
import java.awt.Toolkit;

import javax.swing.JFrame;

public class home0504 extends JFrame {

    /**
     * Launch the application.
     */
    public static void main(String[] args) {
        EventQueue.invokeLater(new Runnable() {
            public void run() {
                try {
                    home0504 frame = new home0504();
                    frame.setVisible(true);
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
        });
    }

    /**
     * Create the frame.
     */
    public home0504() {
        //setBounds(100, 100, 392, 328);
        setExtendedState(JFrame.MAXIMIZED_BOTH); 
        setSize((int)Toolkit.getDefaultToolkit().getScreenSize().getWidth(), (int)Toolkit.getDefaultToolkit().getScreenSize().getHeight());
        setResizable(true);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

    }

} 

Here's a look in my design tab :