有没有办法让我的地址栏的 JTextField 更大更弯曲

I'm making a browser just to practice my Java skills, is there a way to make my address bar which is a JTextField, larger instead of the swing's default value and also curvier. Here's my code.

//imports of the GUI 
//import java.awt.*;
 //import java.awt.event.*;
 //import javax.swing.*;
 //import javax.swing.event.*;
 //import javax.swing.text.*;
 //import javax.swing.GroupLayout.*;

  //extends is to use the GUI class 
public class ReadFile extends JFrame {
private JTextField addressBar; //to have the address bar 
private JEditorPane display;  //display the html information
 //constructor 

//Set the frame icon to an image loaded from a file.
public ReadFile() {
    super("SPHERE"); //name of the browser


    addressBar = new JTextField("enter an URL", 50); //inside the URL 
    addressBar.addActionListener(
            new ActionListener(){
                public void actionPerformed(ActionEvent event){
                loadCrap(event.getActionCommand());
                }
}

    );
    add(addressBar, BorderLayout.NORTH);



    display = new JEditorPane();
    display.setEditable(false);
    display.addHyperlinkListener(
            new HyperlinkListener(){
            public void hyperlinkUpdate(HyperlinkEvent event){
            if(event.getEventType()==HyperlinkEvent.EventType.ACTIVATED){
            loadCrap(event.getURL().toString());

            }
            }
            } 
    );
    add(new JScrollPane(display), BorderLayout.CENTER);
    setSize(600,200);
    setVisible(true);

   }
  //load crap to display on the screen
    private void loadCrap(String userText){
    try{display.setPage(userText);
    addressBar.setText(userText);}catch(Exception e){System.out.println("crap!")}
    }



    } 

我想制作一个真正可用的浏览器，就像我想要显示 html 及其 CSS 页面一样，我还需要学习什么才能使其工作.

JTextField field = new JTextField(10);
field.setBorder(new CompoundBorder(field.getBorder(), new EmptyBorder(10, 0, 10, 0)));

public class RoundedBorder extends AbstractBorder {

    @Override
    public Insets getBorderInsets(Component c, Insets insets) {
        insets.left = 5;
        insets.right = 5;
        insets.top = 5;
        insets.bottom = 5;

        return insets;
    }

    @Override
    public void paintBorder(Component c, Graphics g, int x, int y, int width, int height) {
        Graphics2D g2d = (Graphics2D) g.create();
        RoundRectangle2D shape = new RoundRectangle2D.Float(0, 0, width - 1, height - 1, 20, 20);
        g2d.setColor(Color.BLACK);
        g2d.draw(shape);
        g2d.dispose();
    }

}

field.setBorder(new CompoundBorder(new RoundedBorder(), new EmptyBorder(10, 0, 10, 0)));

public class FakeRoundedBorder extends JPanel {

    private JTextField field;

    public FakeRoundedBorder(JTextField field) {
        this.field = field;
        setBorder(new EmptyBorder(5, 5, 5, 5));
        field.setBorder(new EmptyBorder(10, 0, 10, 0));
        setLayout(new BorderLayout());
        add(field);
        setOpaque(false);
    }

    @Override
    protected void paintComponent(Graphics g) {
        super.paintComponent(g);
        Graphics2D g2d = (Graphics2D) g.create();
        RoundRectangle2D shape = new RoundRectangle2D.Float(0, 0, getWidth() - 1, getHeight() - 1, 20, 20);
        g2d.setColor(field.getBackground());
        g2d.fill(shape);
        g2d.setColor(Color.BLACK);
        g2d.draw(shape);
        g2d.dispose();
    }

}