Java Swing JComboBox不可编辑
我遇到了一个非常奇怪的问题。我有一个JPanel，其中包含JTextFields和jComboxes。我可以在加载JPanel时更改JComboBox，但只要我触摸或编辑其中一个JText字段，它就不允许我更改任何组合框的 这是一个有效的MCVE。您可以直接使用它，您将看到错误Java Swing JComboBox不可编辑,java,swing,jtextfield,jcombobox,Java,Swing,Jtextfield,Jcombobox,我遇到了一个非常奇怪的问题。我有一个JPanel，其中包含JTextFields和jComboxes。我可以在加载JPanel时更改JComboBox，但只要我触摸或编辑其中一个JText字段，它就不允许我更改任何组合框的 这是一个有效的MCVE。您可以直接使用它，您将看到错误 import java.awt.BorderLayout; import java.awt.EventQueue; import java.awt.Panel; import java.awt.event.ActionE
import java.awt.BorderLayout;
import java.awt.EventQueue;
import java.awt.Panel;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.Properties;
import javax.swing.BoxLayout;
import javax.swing.JButton;
import javax.swing.JComboBox;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JTabbedPane;
import javax.swing.JTextField;
import javax.swing.border.EmptyBorder;
public class Main extends JFrame{
private static JTextField s;
private static JTabbedPane tabbedPane;
private static JPanel config;
private static JComboBox<Object> dns;
private static JComboBox<Object> dnsmm;
private static JButton save;
private static String interval;
private static String dnsen;
private static String dnsm;
private static JPanel server;
static JPanel contentPane;
public static void main(String[] args) throws InterruptedException {
EventQueue.invokeLater(new Runnable() {
public void run() {
try {
Main frame = new Main();
frame.setVisible(true);
} catch (Exception e) {
e.printStackTrace();
}
}
});
}
public Main() throws IOException {
setDefaultCloseOperation(javax.swing.JFrame.EXIT_ON_CLOSE);
setBounds(100, 100, 655, 470);
contentPane = new JPanel();
contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));
contentPane.setLayout(new BorderLayout(1, 1));
setContentPane(contentPane);
tabbedPane = new JTabbedPane(JTabbedPane.TOP);
contentPane.add(tabbedPane, BorderLayout.CENTER);
setResizable(false);
server = new JPanel();
server.setLayout(new BorderLayout(0, 0));
ServerPanel();
}
public static void ServerPanel() throws IOException{
tabbedPane.addTab("Manage Server", server);
InputStream in = new FileInputStream("config.dedserver");
Properties p = new Properties();
p.load(in);
in.close();
String saveInt = p.getProperty("saveInterval");
String dnse = p.getProperty("enableDns");
String dnsmo = p.getProperty("serverMode");
config = new JPanel();
server.add(config, BorderLayout.CENTER);
config.setLayout(new BoxLayout(config, BoxLayout.PAGE_AXIS));
//saveint
Panel panel_6 = new Panel();
config.add(panel_6);
JLabel sl = new JLabel("Save Interval (milliseconds): ");
panel_6.add(sl);
s = new JTextField(saveInt);
panel_6.add(s);
s.setColumns(10);
//dnsenabled
Panel panel_9 = new Panel();
config.add(panel_9);
JLabel dnsl = new JLabel("DNS Enabled: ");
panel_9.add(dnsl);
String[] dnsS = { "true", "false" };
dns = new JComboBox<Object>(dnsS);
dns.setSelectedItem(dnse);
dns.addActionListener(dns);
panel_9.add(dns);
//dnsmode
Panel panel_10 = new Panel();
config.add(panel_10);
JLabel dnsml = new JLabel("DNS Server Mode: ");
panel_10.add(dnsml);
String[] dnsm = { "local", "remote" };
dnsmm = new JComboBox<Object>(dnsm);
dnsmm.setSelectedItem(dnsmo);
dnsmm.addActionListener(dnsmm);
panel_10.add(dnsmm);
JPanel panel_7= new JPanel();
config.add(panel_7);
save = new JButton("Save");
panel_7.add(save);
save.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent arg0) {
errorCheck();
}
});
}
public static void errorCheck(){
interval = s.getText();
dnsen = (String) dns.getSelectedItem();
dnsm = (String) dnsmm.getSelectedItem();
interval = checkValues(interval, "60000", "save interval");
saveValues();
}
public static String checkValues(String value, String def, String name){
String val;
try{
Long.parseLong(value);
val = ""+value+"";
}catch(NumberFormatException e){
JOptionPane.showMessageDialog(null, "You did not enter a valid number for the "+ name + " field! It has been set to the default.");
val = def;
}
return val;
}
public static void saveValues(){
try {
Properties props = new Properties();
props.setProperty("saveInterval", interval);
props.setProperty("serverMode", dnsm);
props.setProperty("enableDns", dnsen);
File f = new File("config.dedserver");
OutputStream out = new FileOutputStream(f);
props.store(out, "");
JOptionPane.showMessageDialog(null, "Saved Config Values!");
}
catch (Exception e ) {
e.printStackTrace();
}
}
}
谢谢大家! 尽管
JComboBoxActionListeneraddActionListenerimport java.awt.BorderLayout;
import java.awt.EventQueue;
import java.awt.Panel;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.Properties;
import javax.swing.BoxLayout;
import javax.swing.JButton;
import javax.swing.JComboBox;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JTabbedPane;
import javax.swing.JTextField;
import javax.swing.border.EmptyBorder;
public class Main extends JFrame{
private static JTextField s;
private static JTabbedPane tabbedPane;
private static JPanel config;
private static JComboBox<Object> dns;
private static JComboBox<Object> dnsmm;
private static JButton save;
private static String interval;
private static String dnsen;
private static String dnsm;
private static JPanel server;
static JPanel contentPane;
public static void main(String[] args) throws InterruptedException {
EventQueue.invokeLater(new Runnable() {
public void run() {
try {
Main frame = new Main();
frame.setVisible(true);
} catch (Exception e) {
e.printStackTrace();
}
}
});
}
public Main() throws IOException {
setDefaultCloseOperation(javax.swing.JFrame.EXIT_ON_CLOSE);
setBounds(100, 100, 655, 470);
contentPane = new JPanel();
contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));
contentPane.setLayout(new BorderLayout(1, 1));
setContentPane(contentPane);
tabbedPane = new JTabbedPane(JTabbedPane.TOP);
contentPane.add(tabbedPane, BorderLayout.CENTER);
setResizable(false);
server = new JPanel();
server.setLayout(new BorderLayout(0, 0));
ServerPanel();
}
public static void ServerPanel() throws IOException{
tabbedPane.addTab("Manage Server", server);
InputStream in = new FileInputStream("config.dedserver");
Properties p = new Properties();
p.load(in);
in.close();
String saveInt = p.getProperty("saveInterval");
String dnse = p.getProperty("enableDns");
String dnsmo = p.getProperty("serverMode");
config = new JPanel();
server.add(config, BorderLayout.CENTER);
config.setLayout(new BoxLayout(config, BoxLayout.PAGE_AXIS));
//saveint
Panel panel_6 = new Panel();
config.add(panel_6);
JLabel sl = new JLabel("Save Interval (milliseconds): ");
panel_6.add(sl);
s = new JTextField(saveInt);
panel_6.add(s);
s.setColumns(10);
//dnsenabled
Panel panel_9 = new Panel();
config.add(panel_9);
JLabel dnsl = new JLabel("DNS Enabled: ");
panel_9.add(dnsl);
String[] dnsS = { "true", "false" };
dns = new JComboBox<Object>(dnsS);
dns.setSelectedItem(dnse);
panel_9.add(dns);
//dnsmode
Panel panel_10 = new Panel();
config.add(panel_10);
JLabel dnsml = new JLabel("DNS Server Mode: ");
panel_10.add(dnsml);
String[] dnsm = { "local", "remote" };
dnsmm = new JComboBox<Object>(dnsm);
dnsmm.setSelectedItem(dnsmo);
panel_10.add(dnsmm);
JPanel panel_7= new JPanel();
config.add(panel_7);
save = new JButton("Save");
panel_7.add(save);
save.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent arg0) {
errorCheck();
}
});
}
public static void errorCheck(){
interval = s.getText();
dnsen = (String) dns.getSelectedItem();
dnsm = (String) dnsmm.getSelectedItem();
interval = checkValues(interval, "60000", "save interval");
saveValues();
}
public static String checkValues(String value, String def, String name){
String val;
try{
Long.parseLong(value);
val = ""+value+"";
}catch(NumberFormatException e){
JOptionPane.showMessageDialog(null, "You did not enter a valid number for the "+ name + " field! It has been set to the default.");
val = def;
}
return val;
}
public static void saveValues(){
try {
Properties props = new Properties();
props.setProperty("saveInterval", interval);
props.setProperty("serverMode", dnsm);
props.setProperty("enableDns", dnsen);
File f = new File("config.dedserver");
OutputStream out = new FileOutputStream(f);
props.store(out, "");
JOptionPane.showMessageDialog(null, "Saved Config Values!");
}
catch (Exception e ) {
e.printStackTrace();
}
}
}
导入java.awt.BorderLayout；
导入java.awt.EventQueue；
导入java.awt.Panel；
导入java.awt.event.ActionEvent；
导入java.awt.event.ActionListener；
导入java.io.File；
导入java.io.FileInputStream；
导入java.io.FileOutputStream；
导入java.io.IOException；
导入java.io.InputStream；
导入java.io.OutputStream；
导入java.util.Properties；
导入javax.swing.BoxLayout；
导入javax.swing.JButton；
导入javax.swing.JComboBox；
导入javax.swing.JFrame；
导入javax.swing.JLabel；
导入javax.swing.JOptionPane；
导入javax.swing.JPanel；
导入javax.swing.JTabbedPane；
导入javax.swing.JTextField；
导入javax.swing.border.EmptyBorder；
公共类主框架{
私有静态jtexts字段；
私有静态JTabbedPane选项卡窗格；
私有静态JPanel配置；
专用静态JComboxDNS；
专用静态JComboxDNSMM；
私有静态JButton保存；
私有静态字符串间隔；
私有静态字符串dnsen；
私有静态字符串dnsm；
专用静态JPanel服务器；
静态JPanel内容窗格；
公共静态void main（字符串[]args）引发InterruptedException{
invokeLater（新的Runnable（）{
公开募捐{
试一试{
主机架=新主机架（）；
frame.setVisible（true）；
}捕获（例外e）{
e、 printStackTrace（）；
}
}
});
}
public Main（）引发IOException{
setDefaultCloseOperation（javax.swing.JFrame.EXIT_ON_CLOSE）；
挫折（100100655470）；
contentPane=newjpanel（）；
setboorder（新的EmptyBorder（5,5,5,5））；
setLayout（新的BorderLayout（1,1））；
setContentPane（contentPane）；
tabbedPane=新的JTabbedPane（JTabbedPane.TOP）；
添加（选项卡窗格，BorderLayout.CENTER）；
可设置大小（假）；
server=newjpanel（）；
setLayout（新的BorderLayout（0,0））；
服务器面板（）；
}
public static void ServerPanel（）引发IOException{
addTab（“管理服务器”，服务器）；
InputStream in=新文件InputStream（“config.dedserver”）；
属性p=新属性（）；
p、 荷载（in）；
in.close（）；
字符串saveInt=p.getProperty（“saveInterval”）；
字符串dnse=p.getProperty（“enableDns”）；
字符串dnsmo=p.getProperty（“服务器模式”）；
config=newjpanel（）；
添加（配置，BorderLayout.CENTER）；
config.setLayout（新的BoxLayout（config，BoxLayout.PAGE_轴））；
//萨文特
面板面板_6=新面板（）；
配置添加（面板6）；
JLabel sl=新的JLabel（“保存间隔（毫秒）：”；
面板6.添加（sl）；
s=新的JTextField（saveInt）；
面板6.添加（s）；
s、 设置列（10）；
//D允许
面板面板9=新面板（）；
配置添加（面板9）；
JLabel dnsl=新JLabel（“已启用DNS:”）；
面板9.添加（dnsl）；
字符串[]dnsS={“真”、“假”}；
dns=新的JComboBox（dnsS）；
dns.setSelectedItem（dnse）；
面板9.添加（dns）；
//德斯莫德
面板面板_10=新面板（）；
配置添加（面板10）；
JLabel dnsml=新的JLabel（“DNS服务器模式：”）；
面板_10.添加（dnsml）；
字符串[]dnsm={“本地”，“远程”}；
dnsmm=新的JComboBox（dnsm）；
dnsmm.setSelectedItem（dnsmo）；
面板_10.添加（dnsmm）；
JPanel panel_7=新的JPanel（）；
配置添加（面板7）；
保存=新的JButton（“保存”）；
面板7.添加（保存）；
save.addActionListener（新建ActionListener（））{
已执行的公共无效操作（操作事件arg0）{
错误检查（）；
}
});
}
公共静态无效错误检查（）{
interval=s.getText（）；
dnsen=（字符串）dns.getSelectedItem（）；
dnsm=（字符串）dnsmm.getSelectedItem（）；
间隔=校验值（间隔，“60000”，“保存间隔”）；
saveValues（）；
}
公共静态字符串校验值（字符串值、字符串定义、字符串名称）{
字符串val；
试一试{
Long.parseLong（值）；
val=”“+值+”；
}捕获（数字格式）{
showMessageDialog（null，“您没有为“+name+”字段输入有效的数字！它已设置为默认值。”）；
val=def；
}
返回val；
}
公共静态void saveValues（）{
试一试{
Properties props=新属性（）；
props.setProperty（“saveInterval”，interval）；
props.setProperty（“服务器模式”，dnsm）；
props.setProperty（“enableDns”，dnsen）；
文件f=新文件（“config.dedserver”）；
OutputStream out=新文件OutputStream（f）；
道具存储（输出“”；
showMessageDialog（null，“保存的配置值！”）；
}
捕获（例外e）{
e、 printStackTrace（）；
}
}
}
面板import java.awt.BorderLayout;
import java.awt.EventQueue;
import java.awt.Panel;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.Properties;
import javax.swing.BoxLayout;
import javax.swing.JButton;
import javax.swing.JComboBox;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JTabbedPane;
import javax.swing.JTextField;
import javax.swing.border.EmptyBorder;
public class Main extends JFrame{
private static JTextField s;
private static JTabbedPane tabbedPane;
private static JPanel config;
private static JComboBox<Object> dns;
private static JComboBox<Object> dnsmm;
private static JButton save;
private static String interval;
private static String dnsen;
private static String dnsm;
private static JPanel server;
static JPanel contentPane;
public static void main(String[] args) throws InterruptedException {
EventQueue.invokeLater(new Runnable() {
public void run() {
try {
Main frame = new Main();
frame.setVisible(true);
} catch (Exception e) {
e.printStackTrace();
}
}
});
}
public Main() throws IOException {
setDefaultCloseOperation(javax.swing.JFrame.EXIT_ON_CLOSE);
setBounds(100, 100, 655, 470);
contentPane = new JPanel();
contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));
contentPane.setLayout(new BorderLayout(1, 1));
setContentPane(contentPane);
tabbedPane = new JTabbedPane(JTabbedPane.TOP);
contentPane.add(tabbedPane, BorderLayout.CENTER);
setResizable(false);
server = new JPanel();
server.setLayout(new BorderLayout(0, 0));
ServerPanel();
}
public static void ServerPanel() throws IOException{
tabbedPane.addTab("Manage Server", server);
InputStream in = new FileInputStream("config.dedserver");
Properties p = new Properties();
p.load(in);
in.close();
String saveInt = p.getProperty("saveInterval");
String dnse = p.getProperty("enableDns");
String dnsmo = p.getProperty("serverMode");
config = new JPanel();
server.add(config, BorderLayout.CENTER);
config.setLayout(new BoxLayout(config, BoxLayout.PAGE_AXIS));
//saveint
Panel panel_6 = new Panel();
config.add(panel_6);
JLabel sl = new JLabel("Save Interval (milliseconds): ");
panel_6.add(sl);
s = new JTextField(saveInt);
panel_6.add(s);
s.setColumns(10);
//dnsenabled
Panel panel_9 = new Panel();
config.add(panel_9);
JLabel dnsl = new JLabel("DNS Enabled: ");
panel_9.add(dnsl);
String[] dnsS = { "true", "false" };
dns = new JComboBox<Object>(dnsS);
dns.setSelectedItem(dnse);
panel_9.add(dns);
//dnsmode
Panel panel_10 = new Panel();
config.add(panel_10);
JLabel dnsml = new JLabel("DNS Server Mode: ");
panel_10.add(dnsml);
String[] dnsm = { "local", "remote" };
dnsmm = new JComboBox<Object>(dnsm);
dnsmm.setSelectedItem(dnsmo);
panel_10.add(dnsmm);
JPanel panel_7= new JPanel();
config.add(panel_7);
save = new JButton("Save");
panel_7.add(save);
save.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent arg0) {
errorCheck();
}
});
}
public static void errorCheck(){
interval = s.getText();
dnsen = (String) dns.getSelectedItem();
dnsm = (String) dnsmm.getSelectedItem();
interval = checkValues(interval, "60000", "save interval");
saveValues();
}
public static String checkValues(String value, String def, String name){
String val;
try{
Long.parseLong(value);
val = ""+value+"";
}catch(NumberFormatException e){
JOptionPane.showMessageDialog(null, "You did not enter a valid number for the "+ name + " field! It has been set to the default.");
val = def;
}
return val;
}
public static void saveValues(){
try {
Properties props = new Properties();
props.setProperty("saveInterval", interval);
props.setProperty("serverMode", dnsm);
props.setProperty("enableDns", dnsen);
File f = new File("config.dedserver");
OutputStream out = new FileOutputStream(f);
props.store(out, "");
JOptionPane.showMessageDialog(null, "Saved Config Values!");
}
catch (Exception e ) {
e.printStackTrace();
}
}
}
//saveint
// Panel panel_6 = new Panel();// replace as below
JPanel panel_6 = new JPanel();
//dnsenabled
// Panel panel_9 = new Panel();
JPanel panel_9 = new JPanel();
//dnsmode
//Panel panel_10 = new Panel();
JPanel panel_10 = new JPanel();