Question

我昨天发布了这个代码的另一个问题，但现在我再一次请求大家帮忙..我感谢所有的帮助到目前为止我没有这个社区我到目前为止还没有。

现在，我的问题非常简单。我有一个带有用户输入框的GUI和三个按钮。按钮不是JButton，它们是标准的JOptionsPane yes，no和cancel按钮。我确实将文本更改为“下一个条目”，“下一批”和“已完成”。

在我更改GUI之前，我有标准按钮。最常使用的按钮是“是”按钮（现在是“下一个条目”）..在我的程序中点击这个按钮很多。在默认按钮设置工作之前..用户只需键入一个数字并快速按Enter键。现在，回车键不会激活默认按钮，而是用户必须在物理上点击它。这就是我想要改变的。

我有什么方法可以设置下面的代码，所以当用户点击回车时，无论他们输入什么文字，都是“是”（现在“默认点击下一批”）？对于它的价值，我确实对此进行了研究，但找不到适合我特定情况的解决方案。

package nacha;

import java.awt.BorderLayout;

import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JTextField;

public class Testing4 

{

    public static void main(String args[]){

        String css = "<span style='font-size:10; color: white; background-color:black'>";
        String batchCss = "<span style='font-size: 20'>";
        String endSpanCss = "</span>"; 
        String table = "<table border=4>";
        String endTable = "</table>"; 
        String mainCss = "<span style='font-size:12; color: red'>";
        String header1Css = "<span style = 'font-size:15; font-weight:bold;text-decoration:underline;border:1px dotted red'>";
        String text1Css = "<span style = 'font-size:12; font-style:italic'>";



         String text = "<html>" +
                css + batchCss + "1 of 2"+endSpanCss+endSpanCss+ endSpanCss +
                "<br><br><br>"+header1Css+"Entry Detail:"+endSpanCss +
                "<br>"+mainCss+"111111111111111111111"+endSpanCss+
                "<br><br><br>"+text1Css+"Please type 1-21 to apply a reason code and addenda record to the entry detail." +
                "<br>Please type 'h' and press the next entry button to open the help screen."+endSpanCss +
                "<br><br><br>"+header1Css+"Reason Codes"+ endSpanCss +
                "<br>"+table+"R01 - Insufficient Funds" +
                "<br>R02 - Account Closed" +
                "<br>R03 - No Account" +
                "<br>R04 - Invalid Account Number" +
                "<br>R05 - Unauthorized Debit to Consumer Account" +
                "<br>R06 - Returned per ODFI Request" +
                "<br>R07 - Auth Revoked by Customer" +
                "<br>R08 - Payment Stopped" +
                "<br>R09 - Uncollected Funds" +
                "<br>R10 - Customer Advises Not Authorized" +
                "<br>R11 - Check Truncation Entry Return" +
                "<br>R12 - Branch Sold to Another DFI" +
                "<br>R13 - Invalid ACH Routing Number" +
                "<br>R14 - Represenative Payee Deceased or Unable to Continue" +
                "<br>R15 - Beneficiary or Account Holder Deceased" +
                "<br>R16 - Account Frozen" +
                "<br>R17 - File Record Edit Criteria" +
                "<br>R18 - Improper Effective Entry Date" +
                "<br>R19 - Account Field Error" +
                "<br>R20 - Non-Transaction Amount" +
                "<br>R21 - Invalid Company Information" +
                "<br>R22 - Invalid Individual ID Number"+endTable;

         //Below code creates the GUI for the return builder portion of the program. 
          Object[] options1 = {"Next Entry","Next Batch","Finished"};//Changes the default buttons. 
          BorderLayout border = new BorderLayout();
          JPanel panel = new JPanel();     
          panel.setLayout(border);
          panel.add(new JLabel(text),BorderLayout.NORTH);//Adds the label to the top of the panel.               
          JTextField textField = new JTextField(10); 
          panel.add(textField,BorderLayout.SOUTH);//Adds a user-input text area to the bottom of the panel.

          int result = JOptionPane.showOptionDialog(null, panel, "Return Builder", JOptionPane.YES_NO_CANCEL_OPTION, JOptionPane.PLAIN_MESSAGE, null, options1, JOptionPane.YES_OPTION);

    }

}

Answer 1

您需要将默认选项作为JOptionPane.showOptionDialog的最终参数传递：

int result = JOptionPane.showOptionDialog(null, panel, "Return Builder",
    JOptionPane.YES_NO_CANCEL_OPTION, JOptionPane.PLAIN_MESSAGE, null,
    options1, options1[0]);

这会产生副作用，即只要显示对话框，该按钮就会具有初始键盘焦点。如果你不想要它，你可以强制JTextField在窗口中显示它时接收焦点：

textField.addHierarchyListener(new HierarchyListener() {
    @Override
    public void hierarchyChanged(HierarchyEvent e) {
        final Component c = e.getComponent();
        long flags = e.getChangeFlags();
        if ((flags & HierarchyEvent.SHOWING_CHANGED) != 0 &&
                c.isShowing()) {

            EventQueue.invokeLater(new Runnable() {
                @Override
                public void run() {
                    c.requestFocusInWindow();
                }
            });
        }
    }
});

附注：为了要求用户从已知选项列表中进行选择，JComboBox是比JTextField更好的选择。您的帮助选项可以只是一个不同的JButton，存在于JOptionPane的消息体中。

JOptionsPane的默认按钮无法正常工作

1 个答案: