无法启用灰色（.setEnabled（false））jtextfield或jtextarea
不幸的是，我无法打开JTEXTFIELD或JTEXTFIELD（两者都尝试）的.setenable（）。它一直保持灰色，因此用户无法输入。请帮助我。
详细信息：Tatwo可以是JTEXTFIELD或JTEXTAREA，但我尝试的任何尝试都无法启用。应该禁用A，但应启用B的B，因此，如果用户选择A/她无法在Tatwo字段中输入值，但是如果用户选择B，则可以在Tatwo中写入。
该方法如下：
public void btnAddtreeAction() {
this.btnAddtree.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
JPanel dialogPanel = new JPanel();
dialogPanel.setPreferredSize(new Dimension(60,60));
String[] choices = {"A", "B"};
JComboBox<String> cb = new JComboBox<String>(choices);
JTextArea taOne = new JTextArea(1,30);
JTextField taTwo = new JTextField();
taTwo.setEnabled(false);
Object[] myObject = {"Options:", cb,
"Input first:", taOne,
"Input second:", taTwo};
JOptionPane.showConfirmDialog(frame, myObject, "Form", JOptionPane.OK_CANCEL_OPTION);
if (cb.getSelectedItem().toString().equals("A")) {
//something will happen here
} else if (cb.getSelectedItem().toString().equals("B")) {
taTwo.setEnabled(true);
//something will happen here
}
}
});
}
Unfortunately, I cannot turn on .setEnable() for a JTextField, or a JTextField (tried both). It keeps remaining gray, so users cannot type. Please help me out.
Details: taTwo can be either a JTextField or JTextArea but any I try cannot be enabled. It should be disabled for A but should be enabled for B, so if user choose A he/she can NOT enter a value in taTwo field, but if the user choose B he/she can write in taTwo.
The method is the following:
public void btnAddtreeAction() {
this.btnAddtree.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
JPanel dialogPanel = new JPanel();
dialogPanel.setPreferredSize(new Dimension(60,60));
String[] choices = {"A", "B"};
JComboBox<String> cb = new JComboBox<String>(choices);
JTextArea taOne = new JTextArea(1,30);
JTextField taTwo = new JTextField();
taTwo.setEnabled(false);
Object[] myObject = {"Options:", cb,
"Input first:", taOne,
"Input second:", taTwo};
JOptionPane.showConfirmDialog(frame, myObject, "Form", JOptionPane.OK_CANCEL_OPTION);
if (cb.getSelectedItem().toString().equals("A")) {
//something will happen here
} else if (cb.getSelectedItem().toString().equals("B")) {
taTwo.setEnabled(true);
//something will happen here
}
}
});
}
如果你对这篇内容有疑问，欢迎到本站社区发帖提问 参与讨论，获取更多帮助，或者扫码二维码加入 Web 技术交流群。
绑定邮箱获取回复消息
由于您还没有绑定你的真实邮箱，如果其他用户或者作者回复了您的评论，将不能在第一时间通知您！
发布评论
评论（2）
在您的
ActionPerformed方法中，您正在创建 newJTEXTFIELD您未添加到GUI中。我认为您有另一个名为tatwo的变量，您未发布的代码中的某些变量。您是 在ActionPerformed方法中更改该变量。尝试删除您的代码的这一行：In your
actionPerformedmethod, you are creating a newJTextFieldwhich you are not adding to your GUI. I presume that you have another variable namedtaTwosomehere in the code that you did not post. You are not changing that variable inside theactionPerformedmethod. Try removing this line of your code:如果我正确理解您的问题，则需要将enableMet/禁用代码移动到另一个
actionListener中，然后将其添加到ComboBox中。这样的事情：If I correctly understand your question, you need to move your enablemet/disablement code into another
ActionListenerand add it to your combobox. Something like this: