如何在JTabbedPane中读取panel的组件并将结果添加到组件中

Question

1、样本类：

import java.awt.Component;
import java.util.ArrayList;
import java.util.List;

import javax.swing.JPanel;

public class Sample {

    public Sample() {}

    public List<Component> getComponents(int id , Object obj) {
        List<Component> result = new ArrayList<Component>();
        if (id == 1 && obj instanceof ExampleTab1) {
            Component[] component =((ExampleTab1)obj).getContentPanel().getComponents();
            for (Component comp : component) {
                if (comp instanceof JPanel) {                                              
                    String compName = ((JPanel)comp).getName().toString();
                    if (compName.equals("panelResult")) {
                        //do the stuff
                    }
                }
            }
        }
        return result;
    }
}

2、示例ab1类：

import javax.swing.JPanel;

public class ExampleTab1 {
    public ExampleTab1() { }
    public JPanel getContentPanel()  {
        JPanel contentPane = new JPanel();
        //all the components added to the panel 
        return contentPane;
    }
}

Answer 1

如果您希望拥有容器中的所有元素（如JPanel或JTabbedPane等）您需要手动收集它们，因为getComponents（）只读取容器的直接子级。

您需要将以下函数添加到示例类中：

public List<Component> getAllComponents(Container container) {
    Component[] components = container.getComponents();
    List <Component> result = new ArrayList<Component>();
    for (Component component : components) {
        result.add(component);
        if (component instanceof Container) {
            result.addAll(getAllComponents((Container) component));
        }
    }
    return result;
}

您需要替换以下代码：

Component[] component =((ExampleTab1)obj).getContentPanel().getComponents();

List<Component> components = getAllComponents(((ExampleTab1)obj).getContentPanel());