在JavaSwing中将JPanel动态添加到另一个JPanel

Question

我对java swing非常陌生，java也是。我使用netbeans的窗口生成器来设计GUI。我有一个名为orderListPanel的JPanel，其中包括一个名为orderListRowPanel的JPanel。现在，我得到了一个JPanel列表，我想将这些JPanel插入orderListPanel

http://postimage.org/image/ex00whf69/
OrthistListBub在中间，OrrordListWoad面板与OrthistListPosib/P>恰好相同的地方

http://postimage.org/image/dbrtn33sj/
现在我想在orderListPanel中插入许多JPanel，使其看起来像一个列表。红色方块是JPanel中的组件

我尝试使用BorderLayout，当我使用 foreach循环orderListPanel。add（List pList），我在orderListPanel中看不到任何结果。有人知道怎么解决吗

Answer 1

不要使用Netbeans automated GUI builder。拖放式GUI构建技术在Java社区是不可接受的。您尚未提供代码，因此我们无法进行代码编辑。您的图像不可用

但是，这是你可以做到的。这是一个纯手工代码

import java.awt.*;
import java.util.ArrayList;
import javax.swing.*;
import java.util.List;

public class GUIBuilder extends JFrame
{
    private JPanel orderList;
    private JPanel orderListRow;
    private JPanel additionalPanel;

    private List panels = new ArrayList(); //Your List

    private JLabel label1, label2, label3;

    public GUIBuilder()
    {
        label1 = new JLabel("Label 1"); //Create the JLabels
        label2 = new JLabel("Label 2");//Create the JLabels
        label3 = new JLabel("Label 3");//Create the JLabels


        orderList = new JPanel(); //Creating the orderList JPanel
       orderList.setLayout(new BoxLayout(orderList, BoxLayout.Y_AXIS)); //Setting Box layout, and set the direction to Y axis.


        orderListRow = new JPanel(); //Creating the orderListRow JPanel        
        orderListRow.add(label1);

        additionalPanel = new JPanel(); //Creating the additionalPanel JPanel      
        additionalPanel.add(label2);

        orderList.add(orderListRow); //Adding orderListRow into orderList
        orderList.add(additionalPanel); //Adding additionalPanel into orderList

        this.setLayout(new GridLayout(1,1));
        this.add(orderList); //Setting orderList into JFrame

        this.pack(); //Setting JFrame size. This will only take required space
        this.setVisible(true); //Making JFrame Visible
        this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); //When you hit the 'X' button, the program will exit
    }

    public static void main(String[]args)
    {
        try
        {
            UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName()); //Setting the UI into your native platform UI
            new GUIBuilder(); //Calling your program
        }
        catch(Exception e)
        {
            e.printStackTrace(); //If any error occured in setting up UI, print the stack trace
        }
    }
}

如果你把面板放在一个列表中，那么就用这个

import java.awt.*;
import java.util.ArrayList;
import javax.swing.*;
import java.util.List;

public class GUIBuilder extends JFrame
{
    private JPanel orderList;
    private JPanel orderListRow;
    private JPanel additionalPanel;

    private List<JPanel> panels = new ArrayList<JPanel>(); //Your List

    private JLabel label1, label2, label3;

    public GUIBuilder()
    {
        label1 = new JLabel("Label 1"); //Create the JLabels
        label2 = new JLabel("Label 2");//Create the JLabels
        label3 = new JLabel("Label 3");//Create the JLabels


        orderList = new JPanel(); //Creating the orderList JPanel
        orderList.setLayout(new BoxLayout(orderList, BoxLayout.Y_AXIS)); //Setting Box layout, and set the direction to Y axis.


        orderListRow = new JPanel(); //Creating the orderListRow JPanel        
        orderListRow.add(label1);
        panels.add(orderListRow); // Add the panel to the List

        additionalPanel = new JPanel(); //Creating the additionalPanel JPanel      
        additionalPanel.add(label2);
        panels.add(additionalPanel); // Add the panel to the List


        for(int i=0;i<panels.size();i++)
        {
            orderList.add(panels.get(i));
        }



        this.setLayout(new GridLayout(1,1));
        this.add(orderList); //Setting orderList into JFrame

        this.pack(); //Setting JFrame size. This will only take required space
        this.setVisible(true); //Making JFrame Visible
        this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); //When you hit the 'X' button, the program will exit
    }

    public static void main(String[]args)
    {
        try
        {
            UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName()); //Setting the UI into your native platform UI
            new GUIBuilder(); //Calling your program
        }
        catch(Exception e)
        {
            e.printStackTrace(); //If any error occured in setting up UI, print the stack trace
        }
    }
}