blocks|key|1031227|text|public+class+Parent+{

++++private+void+init()+{
++++++++//+...
++++++++combo.addActionListener(new+ActionListener()+{
++++++++++++public+void+actionPerformed(ActionEvent+e)+{
++++++++++++++++Object+selected+=+combo.getSelectedItem();
++++++++++++++++textField.setText(getTextBasedOnSelection(selected));
++++++++++++}
++++++++});
++++++++//+...
++++}

++++/**
+++++*+Returns+the+text+to+display+when+the+given+object+is+selected.
+++++*+Subclasses+may+override+this+method+to+display+what+they+want
+++++*/
++++protected+String+getTextBasedOnSelection(Object+selected)+{
++++++++return+selected.toString();
++++}
++++//+...
}|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|1031228|unstyled|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|G|8|@]|9|@]|A|$B|C]]|$1|D|3|-4|5|E|7|H|8|@]|9|@]|A|$]]]|F|$]]

<pre><code>public class Parent {

 private void init() {
 // ...
 combo.addActionListener(new ActionListener() {
 public void actionPerformed(ActionEvent e) {
 Object selected = combo.getSelectedItem();
 textField.setText(getTextBasedOnSelection(selected));
 }
 });
 // ...
 }

 /**
 * Returns the text to display when the given object is selected.
 * Subclasses may override this method to display what they want
 */
 protected String getTextBasedOnSelection(Object selected) {
 return selected.toString();
 }
 // ...
}
</code></pre>

blocks|key|11559|text|我希望我能解决你的问题。您有一个包含多个子视图的View组件，并且您希望更新一个子视图，因为在另一个子视图中所做的更改。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|11560|因此，您可以在main+View中为您的组合框编写一个操作侦听器：|11561|comboBox.addActionListener(new+ActionListener(){

++++++++++++@Override
++++++++++++public+void+actionPerformed(ActionEvent+arg0)+{
++++++++++++++++textField.setText(comboBox.getSelectedItem());
++++++++++++}

++++++++});|code-block|syntax|javascript|11562|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|L|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|M|8|@]|9|@]|A|$G|H]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

I hope I get your problem right. You have a View Component with several subviews and you want to update one because of the changes done inside the other one. 

Therefore you write an action listener for your combobox in the main View: 

<pre><code>comboBox.addActionListener(new ActionListener(){

 @Override
 public void actionPerformed(ActionEvent arg0) {
 textField.setText(comboBox.getSelectedItem());
 }

 });
</code></pre>

blocks|key|3599637|text|我建议使用Mediator+pattern，而不是直接互连组件:创建JPanel的子类(例如XyzPane)，在其中放置所有组件。该类将成为中介者。它|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|3599638|3599639|根据需要侦听其components|unordered-list-item|3599640|updates组件的事件如果需要，|3599641|会触发自己的事件(这允许它成为父中介的一部分:在窗格中对组件进行分组，然后嵌套窗格)|3599642|3599643|entityMap|0|LINK|mutability|MUTABLE|url|http://en.wikipedia.org/wiki/Mediator_pattern^0|5|G|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|U|8|@]|9|@$A|V|B|W|1|X]]|C|$]]|$1|D|3|-4|5|6|7|Y|8|@]|9|@]|C|$]]|$1|E|3|F|5|G|7|Z|8|@]|9|@]|C|$]]|$1|H|3|I|5|G|7|10|8|@]|9|@]|C|$]]|$1|J|3|K|5|G|7|11|8|@]|9|@]|C|$]]|$1|L|3|-4|5|6|7|12|8|@]|9|@]|C|$]]|$1|M|3|-4|5|6|7|13|8|@]|9|@]|C|$]]]|N|$O|$5|P|Q|R|C|$S|T]]]]

Instead of inter-connecting components directly, I recommend to apply the <a href="http://en.wikipedia.org/wiki/Mediator_pattern" rel="nofollow">Mediator pattern</a>:
Create a subclass of JPanel (e.g. XyzPane) where you put all your components in. This class becomes the Mediator. It

<ul>
<li>listens for events of its components</li>
<li>updates the components as needed</li>
<li>fires its own events, if needed (this allows it to be a part of a parent Mediator: grouping components in Panes and then nesting the Panes)</li>
</ul>

I have a GUI designed in Swing with all of the Components laid out. For example I have a JComboBox with a JList and a JTextField, 

When I select a different item from the JComboBox I am trying to use a ListSelectionListener to call a method in a subclass to update the JTextField based on the choice, 

How would I go about doing that properly? How do I call the subclass and then from the subclass update the GUI object's value?

Java Swing - how to update GUI Objects ie. JTextField value from sub class in same package

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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我有一个用Swing设计的GUI，其中包含了所有的组件。例如，我有一个带有JList和JTextField的JComboBox，当我从JComboBox中选择不同的项时，我尝试使用ListSelectionListener来调用子类中的方法，以基于选择更新JTextField。我该如何正确地去做呢？如何调用子类，然后从...

问Java Swing -如何更新GUI对象。来自同一包中的子类的JTextField值
EN

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问Java Swing -如何更新GUI对象。来自同一包中的子类的JTextField值EN