用Java创建布局

Question

[我正在尝试创建一个如下图所示的布局。我是Java编程的新手。]当我试图运行它时。没有任何错误或任何内容，也没有任何显示。控制台自动停止。请帮助我。

package completeJavaReference; 
import java.awt.FlowLayout; 
import java.awt.GridLayout;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel; 
import javax.swing.JTextField;
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    public class tryingProject extends JFrame {
        public static final long serialVersionUID = 1L;//Eclipse added
        public static JLabel carname;
        public static JLabel price, make, year, trim, category, VIN, model,bodytype;
        public static JLabel dealerinfo, ID, URL, Name;
        public static JTextField priceTextField, makeTextField, yearTextField, 
        trimTextField, categoryTextField, VINTextField, modelTextField, 
        bodytypeTextField;
        private static JTextField dealerinfoTextField, IDTextField, URLTextField, 
        NameTextField;

        public void createComponents() {
            carname = new JLabel("Honda Civic");
            price = new JLabel("Price: ");
            make = new JLabel("Make: ");
            year = new JLabel("Year:");
            trim = new JLabel("Trim:");
            category = new JLabel("Category:");
            VIN = new JLabel("VIN:");
            model = new JLabel("Model:");
            bodytype = new JLabel("Body Type");
            priceTextField = new JTextField(10);
            makeTextField = new JTextField(10);
            yearTextField = new JTextField(10);
            trimTextField = new JTextField(10);
            categoryTextField = new JTextField(10);
            VINTextField = new JTextField(10);
            modelTextField = new JTextField(10);
            bodytypeTextField = new JTextField(10);
            dealerinfo = new JLabel("Dealer Info");
            ID = new JLabel("Dealer ID:");
            URL = new JLabel("URL:");
            Name = new JLabel("Dealer Name");
            dealerinfoTextField = new JTextField(10);
            IDTextField = new JTextField(10);
            URLTextField = new JTextField(10);
            NameTextField = new JTextField(10);
        }
        public void createLayout(){
            JFrame frame = new JFrame("Vehicle Window");
            JPanel Panel1 = new JPanel(new FlowLayout());
            JPanel Panel2 = new JPanel(new GridLayout(4, 3));
            JPanel Panel3 = new JPanel(new FlowLayout());
            Panel1.add(carname);
            Panel2.add(price);
            Panel2.add(priceTextField);
            Panel2.add(make);
            Panel2.add(makeTextField);
            Panel2.add(year);
            Panel2.add(yearTextField);
            Panel2.add(trim);
            Panel2.add(trimTextField);
            Panel2.add(category);
            Panel2.add(categoryTextField);
            Panel2.add(VIN);
            Panel2.add(VINTextField);
            Panel2.add(model);
            Panel2.add(modelTextField);
            Panel2.add(year);
            Panel2.add(yearTextField);
            Panel3.add(dealerinfo);
            Panel3.add(dealerinfoTextField);
            Panel3.add(ID);
            Panel3.add(IDTextField);
            Panel3.add(URL);
            Panel3.add(URLTextField);
            Panel3.add(Name);
            Panel3.add(NameTextField);
            frame.getContentPane().add(Panel1);
            frame.getContentPane().add(Panel2);
            frame.getContentPane().add(Panel3);
            frame.setTitle("Vechicle Details");
            frame.setSize(200, 200);
            frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        }
        public static void main(String args[]) 
        {
        new tryingProject();
        }
    }