java 如何更改 JOptionPane.showInputDialog JTextField 中的字体？

Question

提问by user2477252

I need to know the ui manager property that needs to be set to make the font changed for the JTextFieldin JOptionPane.showInputDialogwindow.

我需要知道需要设置的 ui manager 属性才能为JTextFieldinJOptionPane.showInputDialog窗口更改字体。

Answer 1

回答by Andrew Thompson

One trick is to make a confirmation dialog look like an input dialog. Note that this example still behaves differently to a standard input dialog in that the input field is not selected by default. For that, I have always found the tips in this article on Dialog Focusto be invaluable.

一个技巧是使确认对话框看起来像一个输入对话框。请注意，此示例的行为仍与标准输入对话框不同，因为默认情况下未选择输入字段。为此，我一直发现这篇关于Dialog Focus 的文章中的提示非常宝贵。

The following shows a standard input dialog compared to the confirm dialog using a large font.

下面显示了标准输入对话框与使用大字体的确认对话框的比较。

Standard input dialog Big input dialog

标准输入对话框大输入对话框

import java.awt.*;
import javax.swing.*;

class BigInputOptionPane {

    public static void main(String[] args) {
        Runnable r = new Runnable() {

            @Override
            public void run() {
                String s = JOptionPane.showInputDialog(null);
                if (s!=null) {
                    System.out.println("User chose: " + s);
                } else {
                    System.out.println("User did not chose an option!");
                }

                JTextField tf = new JTextField(8);
                tf.setFont(tf.getFont().deriveFont(26f));
                int result = JOptionPane.showConfirmDialog(
                        null, tf, "Input", 
                        JOptionPane.OK_CANCEL_OPTION);
                if (result==JOptionPane.OK_OPTION) {
                    System.out.println("User chose: " + tf.getText());
                } else {
                    System.out.println("User did not chose an option!");
                }
            }
        };
        SwingUtilities.invokeLater(r);
    }
}

Answer 2

回答by Harry

This worked for me to change both the font of the text and buttons in JOptionPane:
Font font = new Font(Font.SANS_SERIF, Font.PLAIN, 20);
UIManager.put("OptionPane.messageFont", font);
UIManager.put("OptionPane.buttonFont", font);

这对我来说改变了 JOptionPane 中文本和按钮的
字体：Font font = new Font(Font.SANS_SERIF, Font.PLAIN, 20);
UIManager.put("OptionPane.messageFont", font);
UIManager.put("OptionPane.buttonFont", font);

Answer 3

回答by WesternGun

This is the way we shall use:

这是我们将使用的方式：

UIManager.put("OptionPane.messageFont", new Font("Arial", Font.BOLD, 14));
UIManager.put("OptionPane.buttonFont", new Font("Arial", Font.PLAIN, 12));

Just remember to set it before any JOptionPane dialog appears.I just put it in the first line of the mainmethod.

请记住在任何 JOptionPane 对话框出现之前设置它。我只是把它放在方法的第一行main。

To see why I do this, the DOC of UIManageris always useful.

要了解我为什么这样做，UIManager的 DOC总是有用的。

Defaults
UIManager manages three sets of UIDefaults. In order, they are:
Developer defaults. With few exceptions Swing does not alter the developer defaults; these are intended to be modified and used by the developer.
Look and feel defaults. The look and feel defaults are supplied by the look and feel at the time it is installed as the current look and feel (setLookAndFeel() is invoked). The look and feel defaults can be obtained using the getLookAndFeelDefaults() method.
System defaults. The system defaults are provided by Swing. Invoking any of the various get methods results in checking each of the defaults, in order, returning the first non-null value. For example, invoking UIManager.getString("Table.foreground") results in first checking developer defaults. If the developer defaults contain a value for "Table.foreground" it is returned, otherwise the look and feel defaults are checked, followed by the system defaults. It's important to note that getDefaults returns a custom instance of UIDefaults with this resolution logic built into it. For example, UIManager.getDefaults().getString("Table.foreground") is equivalent to UIManager.getString("Table.foreground"). Both resolve using the algorithm just described. In many places the documentation uses the word defaults to refer to the custom instance of UIDefaults with the resolution logic as previously described.

默认值
UIManager 管理三组 UIDefaults。按顺序，它们是：
开发者默认。除了少数例外，Swing 不会改变开发人员的默认设置；这些旨在供开发人员修改和使用。
外观和感觉默认。外观默认值由外观在作为当前外观安装时提供（调用 setLookAndFeel()）。外观和感觉默认值可以使用 getLookAndFeelDefaults() 方法获得。
系统默认。系统默认值由 Swing 提供。调用各种 get 方法中的任何一种都会导致依次检查每个默认值，并返回第一个非空值。例如，调用 UIManager.getString("Table.foreground") 会导致首先检查开发人员的默认值。如果开发人员默认值包含“Table.foreground”的值，则返回它，否则检查外观默认值，然后是系统默认值。重要的是要注意 getDefaults 返回一个 UIDefaults 的自定义实例，其中内置了这个解析逻辑。例如， UIManager.getDefaults().getString("Table.foreground") 等价于 UIManager.getString("Table.foreground")。两者都使用刚才描述的算法进行解析。

So, we should change first the developer defaults. And the method UIManager.put(Object key, Object value)is the method to use.

因此，我们应该首先更改开发人员的默认设置。而方法UIManager.put(Object key, Object value)就是使用的方法。

public static Object put(Object key, Object value)
Stores an object in the developer defaults. This is a cover method for getDefaults().put(key, value). This only affects the developer defaults, not the system or look and feel defaults.
Parameters:
key - an Object specifying the retrieval key
value - the Object to store; refer to UIDefaults for details on how null is handled
Returns: the Object returned by UIDefaults.put(java.lang.Object, java.lang.Object)
Throws:
NullPointerException - if key is null

公共静态对象放置（对象键，对象值）
将对象存储在开发人员默认设置中。这是 getDefaults().put(key, value) 的覆盖方法。这仅影响开发人员默认值，而不影响系统或外观默认值。
参数：
key - 指定检索键的对象
value - 要存储的对象；有关如何处理 null 的详细信息，请参阅 UIDefaults
返回： UIDefaults.put(java.lang.Object, java.lang.Object) 返回的Object
抛出：
NullPointerException - 如果键为空

This is exactly what I am looking for: no extra panels, no more trouble of overriding the default UI of JOptionPane.

这正是我正在寻找的：没有额外的面板，不再有覆盖JOptionPane.

A complete list of names of attributes in JOptionPaneis here:

属性名称的完整列表在JOptionPane这里：

http://www.java2s.com/Tutorial/Java/0240__Swing/CustomizingaJOptionPaneLookandFeel.htm

Property String                                 Object Type

OptionPane.actionMap                            ActionMap
OptionPane.background                           Color
OptionPane.border                               Border
OptionPane.buttonAreaBorder                     Border
OptionPane.buttonClickThreshhold                Integer
OptionPane.buttonFont                           Font
OptionPane.buttonOrientation                    Integer
OptionPane.buttonPadding                        Integer
OptionPane.cancelButtonMnemonic                 String
OptionPane.cancelButtonText                     String
OptionPane.cancelIcon                           Icon
OptionPane.errorDialog.border.background        Color
OptionPane.errorDialog.titlePane.background     Color
OptionPane.errorDialog.titlePane.foreground     Color
OptionPane.errorDialog.titlePane.shadow         Color
OptionPane.errorIcon                            Icon
OptionPane.errorSound                           String
OptionPane.font                                 Font
OptionPane.foreground                           Color
OptionPane.informationIcon                      Icon
OptionPane.informationSound                     String
OptionPane.inputDialogTitle                     String
OptionPane.isYesLast                            Boolean
OptionPane.messageAnchor                        Integer
OptionPane.messageAreaBorder                    Border
OptionPane.messageFont                          Font
OptionPane.messageForeground                    Color
OptionPane.messageDialogTitle                   String
OptionPane.minimumSize                          Dimension
OptionPane.noButtonMnemonic                     String
OptionPane.noButtonText                         String
OptionPane.noIcon                               Icon
OptionPane.okButtonMnemonic                     String
OptionPane.okButtonText                         String
OptionPane.okIcon                               Icon
OptionPane.questionDialog.border.background     Color
OptionPane.questionDialog.titlePane.background  Color
OptionPane.questionDialog.titlePane.foreground  Color
OptionPane.questionDialog.titlePane.shadow      Color
OptionPane.questionIcon                         Icon
OptionPane.questionSound                        String
OptionPane.sameSizeButtons                      Boolean
OptionPane.separatorPadding                     Integer
OptionPane.setButtonMargin                      Boolean
OptionPane.titleText                            String
OptionPane.warningDialog.border.background      Color
OptionPane.warningDialog.titlePane.background   Color
OptionPane.warningDialog.titlePane.foreground   Color
OptionPane.warningDialog.titlePane.shadow       Color
OptionPane.warningIcon                          Icon
OptionPane.warningSound                         String
OptionPane.windowBindings                       Object[ ]
OptionPane.yesButtonMnemonic                    String
OptionPane.yesButtonText                        String
OptionPane.yesIcon                              Icon
OptionPaneUI                                    String

Answer 4

回答by MadProgrammer

I believe you want TextField.font. This will return the font used by default for all JTextFields for the currently installed look and feel...

我相信你想要TextField.font。这将返回所有JTextFields默认使用的字体，用于当前安装的外观......

A better solution might be to supply your own JTextField, setup with the font you want to use.

更好的解决方案可能是JTextField使用您想要使用的字体提供您自己的, setup 。

For example...

例如...

(Sorry, updated, used wrong dialog :P)

（抱歉，更新了，使用了错误的对话框：P）

enter image description here

在此处输入图片说明

import java.awt.EventQueue;
import java.awt.Font;
import javax.swing.JOptionPane;
import javax.swing.JTextField;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;

public class TestOptionPane09 {

    public static void main(String[] args) {
        EventQueue.invokeLater(new Runnable() {
            @Override
            public void run() {
                try {
                    UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
                } catch (ClassNotFoundException | InstantiationException | IllegalAccessException | UnsupportedLookAndFeelException ex) {
                }

                JTextField field = new JTextField("Hello");
                field.setFont(field.getFont().deriveFont(Font.BOLD, 24));
                String[] options = {"Ok", "Cancel"};
                int result = JOptionPane.showOptionDialog(
                        null,
                        field,
                        "Help",
                        JOptionPane.OK_CANCEL_OPTION,
                        JOptionPane.QUESTION_MESSAGE,
                        null,
                        options,
                        0);
                switch (result) {
                    case 0:
                        System.out.println("Okay");
                        break;
                    case 1:
                        System.out.println("Cancel");
                        break;
                }
            }
        });
    }
}

Answer 5

回答by user3785010

Here's what works for me in August 2018 using Java 1.8.0_181 to make the font size larger and thus more readable on my 4K laptop monitor. I call it near the top of main prior to invoking dialogs such as the the following:

以下是 2018 年 8 月使用 Java 1.8.0_181 使字体变大，从而在我的 4K 笔记本电脑显示器上更具可读性的方法。在调用如下对话框之前，我在 main 的顶部附近调用它：

String menuChoice = JOptionPane.showInputDialog(null, "some prompt", "Menu", JOptionPane.INFORMATION_MESSAGE);

It's very close to previous answers but differs slightly because it includes settings I did not see in those prior responses:

它与之前的答案非常接近，但略有不同，因为它包含我在之前的响应中没有看到的设置：

/**
 * Changes the font size used in JOptionPane.showInputDialogs to make them more ADA
 * section 508 compliant by making the text size larger,
 * which is very nice for older people and anyone else with vision problems.
 */
private static void makeDialogsEasierToSee() {      

    // This next one is very strange; but, without it,
    // any subsequent attempt to set InternalFrame.titleFont will
    // be ignored, so resist the temptation to remove it.
    JDialog.setDefaultLookAndFeelDecorated(true);

    Font normalFont = new Font(Font.MONOSPACED, Font.PLAIN, 24);
    Font boldFont = normalFont.deriveFont(Font.BOLD);

    UIManager.put("OptionPane.font", normalFont);
    UIManager.put("OptionPane.messageFont", normalFont);
    UIManager.put("OptionPane.buttonFont", normalFont);
    UIManager.put("TextField.font", normalFont);
    UIManager.put("InternalFrame.titleFont", boldFont);
}

java 如何更改 JOptionPane.showInputDialog JTextField 中的字体？

提问by user2477252

回答by Andrew Thompson

回答by Harry

回答by WesternGun

回答by MadProgrammer

回答by user3785010

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java 如何更改 JOptionPane.showInputDialog JTextField 中的字体？

提问by user2477252

回答by Andrew Thompson

回答by Harry

回答by WesternGun

回答by MadProgrammer

回答by user3785010

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