Java 单个复选框节点树中的两种类型的节点

我需要在一棵树中渲染两种类型的节点

父节点和叶节点

我还需要编辑它们

CheckBoxNodeernder如下所示：

public JCheckBox leafRenderer;
public Component getTreeCellRendererComponent(JTree tree, Object value,
    boolean selected, boolean expanded, boolean leaf, int row,
    boolean hasFocus) {
Component returnValue;  

if (leaf) {
    String stringValue =
        tree.convertValueToText(value, selected, expanded, leaf,
            row, false);

    if (selected) {
    leafRenderer.setForeground(selectionForeground);
    leafRenderer.setBackground(selectionBackground);
    } else {
    leafRenderer.setForeground(textForeground);
    leafRenderer.setBackground(textBackground);
    }
    if ((value != null) && (value instanceof DefaultMutableTreeNode)) {
    Object userObject =
        ((DefaultMutableTreeNode) value).getUserObject();
    if (userObject instanceof CheckBoxNode) {
        CheckBoxNode node = (CheckBoxNode) userObject;


        leafRenderer.setText(node.getText());

        System.err.println("Leaf Value = "+node.getText());
        leafRenderer.setSelected(node.isSelected());
    }

    }
    returnValue = leafRenderer;
}
else {

    // For the Parent Node

   leafRenderer.setText(value.toString());
   leafRenderer.setSelected(selected);
   returnValue = leafRenderer;
}
return returnValue;
}

public boolean isCellEditable(EventObject event) {
    //All cells are editable
return true;
   }

 public Component getTreeCellEditorComponent(JTree tree, Object value,
    boolean selected, boolean expanded, boolean leaf, int row) {
Component editor =
    renderer.getTreeCellRendererComponent(tree, value,
        true, expanded, leaf, row, true);


ItemListener itemListener = new ItemListener() {
    public void itemStateChanged(ItemEvent itemEvent) {
    if (stopCellEditing()) {
        fireEditingStopped();
    }
    }
};
if (editor instanceof JCheckBox) {
    ((JCheckBox) editor).addItemListener(itemListener);
}


return editor;
}

编辑如下：

public JCheckBox leafRenderer;
public Component getTreeCellRendererComponent(JTree tree, Object value,
    boolean selected, boolean expanded, boolean leaf, int row,
    boolean hasFocus) {
Component returnValue;  

if (leaf) {
    String stringValue =
        tree.convertValueToText(value, selected, expanded, leaf,
            row, false);

    if (selected) {
    leafRenderer.setForeground(selectionForeground);
    leafRenderer.setBackground(selectionBackground);
    } else {
    leafRenderer.setForeground(textForeground);
    leafRenderer.setBackground(textBackground);
    }
    if ((value != null) && (value instanceof DefaultMutableTreeNode)) {
    Object userObject =
        ((DefaultMutableTreeNode) value).getUserObject();
    if (userObject instanceof CheckBoxNode) {
        CheckBoxNode node = (CheckBoxNode) userObject;


        leafRenderer.setText(node.getText());

        System.err.println("Leaf Value = "+node.getText());
        leafRenderer.setSelected(node.isSelected());
    }

    }
    returnValue = leafRenderer;
}
else {

    // For the Parent Node

   leafRenderer.setText(value.toString());
   leafRenderer.setSelected(selected);
   returnValue = leafRenderer;
}
return returnValue;
}

public boolean isCellEditable(EventObject event) {
    //All cells are editable
return true;
   }

 public Component getTreeCellEditorComponent(JTree tree, Object value,
    boolean selected, boolean expanded, boolean leaf, int row) {
Component editor =
    renderer.getTreeCellRendererComponent(tree, value,
        true, expanded, leaf, row, true);


ItemListener itemListener = new ItemListener() {
    public void itemStateChanged(ItemEvent itemEvent) {
    if (stopCellEditing()) {
        fireEditingStopped();
    }
    }
};
if (editor instanceof JCheckBox) {
    ((JCheckBox) editor).addItemListener(itemListener);
}


return editor;
}

我在这里一直面临着一个独特的问题。 当我选择父节点并选择其他节点时，会为父节点设置其他节点的值。 有线索吗？

---

我在这里犯了什么错误？

看起来您的自定义TreeCellEditor重用了自定义TreeCellRenderer返回的组件，对吗？对我来说，这似乎是一个坏习惯。TreeCellRenderer的默认基于JLabel的实现使用单个JLabel来呈现一个大型树-因此，即使树有1000个节点，也只需要一个JLabel实例。如果在显示编辑器时重用此组件，将导致图形异常

---

我的建议是更改TreeCellEditor实现，以返回与TreeCellRenderer使用的组件不同的组件。

看起来您的自定义TreeCellEditor重用了从自定义TreeCellRenderer返回的组件，对吗？对我来说，这似乎是一个坏习惯。TreeCellRenderer的默认基于JLabel的实现使用单个JLabel来呈现一个大型树-因此，即使树有1000个节点，也只需要一个JLabel实例。如果在显示编辑器时重用此组件，将导致图形异常

---

我的建议是更改TreeCellEditor实现，以返回与TreeCellRenderer使用的组件不同的组件。

您能给我一个如何实现的片段吗？您能给我一个如何实现的片段吗？