当我在NetBeans中运行时，我的GUI将不会显示

Question

/*
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 * and open the template in the editor.
 */

package modelrange;

import javax.swing.DefaultBoundedRangeModel;

public class RangedModel extends javax.swing.JPanel {

    DefaultBoundedRangeModel myModel;

    public static void main(String[] args) {
        java.awt.EventQueue.invokeLater(new Runnable() {
            public void run() {
                new RangedModel().setVisible(true);
            }
       });
    }

    /**
     * Creates new form RangedModel
     */
    public RangedModel() {
        myModel = new DefaultBoundedRangeModel(123, 100, 0, 1000);
        initComponents();
    }

    /**
     * This method is called from within the constructor to initialize the form.
     * WARNING: Do NOT modify this code. The content of this method is always
     * regenerated by the Form Editor.
     */

    private void initComponents() { 
    This is just the automated netbeans code from the GUI builder (edited out for the post)            
    }

Answer 1

>

JPanel表单不是使用GUI Builder中的main方法创建的，而您确实需要这些方法。

JPanel不是运行Swing应用程序所需的顶级容器。

例如，顶级容器是JFrame。因此，应该创建JFrame表单，而不是JPanel表单。在Netbeans GUI Builder中执行此操作时，将为您提供main方法。