java - 如何计算单选按钮的下拉菜单并将结果保存到空白文本字段？

Question

我想做的是允许用户从下拉菜单中选择一个选项，然后选择一个单选按钮，然后计算其结果以显示在文本字段中，或者我猜是一个新面板中。我不需要所有代码，因为我正在尝试自己学习 Java，但任何提示指针或示例代码都会很棒。基本上，如果他们选择下拉列表中的第一个选项和单选按钮，结果应该返回“低”，我一直在尝试使用 NetBeans，所以我认为我让自己更加困惑。我想知道是否可以将下拉变量存储为字符，例如 A-E，将单选按钮存储为 1-5，然后在计算按钮中执行 if 语句或其他内容？如何声明文本字段或面板以使结果显示在那里？就像 a*1 = 'low' b*2='low' e*5='high'

下拉菜单代表风险发生的可能性，单选按钮代表风险的后果。将两者相乘即可确定当前的风险。该程序是我用 PHP 编写的，但我正在尝试将其变成 java 程序，因为我正在学习 Java。

风险发生的可能性是有概率的。从远程概率来看，“近乎确定”选项的概率为 0.1、0.3、0.5、0.7 和 0.9。结果具有成本值(value)。对于没有成本值的最小影响或没有影响，第二个按钮的成本值<5、5-7%、7-10%，最后一个按钮的成本值>10%(无法实现关键里程碑。很容易在 PHP 中做，因为我能够创建一个保存这些值的数据库，然后在选择这两个选项时发送一个查询。只给它们提供数值以将两者相乘会更容易吗？

之所以有两种不同的数据收集是因为我试图让界面变得干净。如果您想了解该功能如何基于网络运行，该网站托管在 timesdomain.com。您必须注册，但它没有任何值(value)，因为它很快就会被删除。不用担心您的密码被盗，因为它存储在带有 4 位盐的 40 位哈希中，因此我实际上无法知道它;)。我的大部分编程经验都是在数据库和php方面，所以整个java语言还是新的。我想让我的程序基于网络变成基于应用程序。我希望它更有意义。

这是我的代码。

package riskcalculator;

public class Gui extends javax.swing.JFrame {

    /** Creates new form Gui */
    public Gui() {
        initComponents();
    }

    @SuppressWarnings("unchecked")
    // <editor-fold defaultstate="collapsed" desc="Generated Code">
    private void initComponents() {

        Consequence = new javax.swing.ButtonGroup();
        jPanel1 = new javax.swing.JPanel();
        jLabel1 = new javax.swing.JLabel();
        jComboBox1 = new javax.swing.JComboBox();
        jRadioButton1 = new javax.swing.JRadioButton();
        jRadioButton2 = new javax.swing.JRadioButton();
        jRadioButton3 = new javax.swing.JRadioButton();
        jRadioButton4 = new javax.swing.JRadioButton();
        jRadioButton5 = new javax.swing.JRadioButton();
        jButton1 = new javax.swing.JButton();
        jPanel2 = new javax.swing.JPanel();

        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);

        jPanel1.setBorder(javax.swing.BorderFactory.createLineBorder(new java.awt.Color(0, 0, 0)));

        jLabel1.setFont(new java.awt.Font("Arial", 0, 24)); // NOI18N
        jLabel1.setText("Risk Claculator");

        jComboBox1.setModel(new javax.swing.DefaultComboBoxModel(new String[] { "Choose a Liklihood", "Remote Chance", "Unlikely Chance", "Likely Chance", "Highly Likely Chance", "Near Certainty Chance" }));

        Consequence.add(jRadioButton1);
        jRadioButton1.setText("Minimal or no impact");

        Consequence.add(jRadioButton2);
        jRadioButton2.setText("Additional resources required, able to satisfy");

        Consequence.add(jRadioButton3);
        jRadioButton3.setSelected(true);
        jRadioButton3.setText("Minor slip in key milestones; not able to meet need date");

        Consequence.add(jRadioButton4);
        jRadioButton4.setText("Major slip in key milestones or critical path impacted");

        Consequence.add(jRadioButton5);
        jRadioButton5.setText("Can't achieve key milestone");

        jButton1.setText("Calculate Risk");
        jButton1.setActionCommand("Calculate Risk");
        jButton1.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jButton1ActionPerformed(evt);
            }
        });

        jPanel2.setBorder(new javax.swing.border.MatteBorder(null));

        javax.swing.GroupLayout jPanel2Layout = new javax.swing.GroupLayout(jPanel2);
        jPanel2.setLayout(jPanel2Layout);
        jPanel2Layout.setHorizontalGroup(
            jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGap(0, 186, Short.MAX_VALUE)
        );
        jPanel2Layout.setVerticalGroup(
            jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGap(0, 70, Short.MAX_VALUE)
        );

        javax.swing.GroupLayout jPanel1Layout = new javax.swing.GroupLayout(jPanel1);
        jPanel1.setLayout(jPanel1Layout);
        jPanel1Layout.setHorizontalGroup(
            jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, jPanel1Layout.createSequentialGroup()
                .addContainerGap(26, Short.MAX_VALUE)
                .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                    .addComponent(jComboBox1, javax.swing.GroupLayout.PREFERRED_SIZE, 127, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(jRadioButton1)
                    .addComponent(jRadioButton2)
                    .addComponent(jRadioButton3)
                    .addComponent(jRadioButton4)
                    .addComponent(jRadioButton5))
                .addContainerGap())
            .addGroup(jPanel1Layout.createSequentialGroup()
                .addGap(99, 99, 99)
                .addComponent(jButton1, javax.swing.GroupLayout.PREFERRED_SIZE, 114, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addContainerGap(110, Short.MAX_VALUE))
            .addGroup(jPanel1Layout.createSequentialGroup()
                .addGap(69, 69, 69)
                .addComponent(jLabel1)
                .addGap(92, 92, 92))
            .addGroup(jPanel1Layout.createSequentialGroup()
                .addGap(55, 55, 55)
                .addComponent(jPanel2, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addContainerGap(80, Short.MAX_VALUE))
        );
        jPanel1Layout.setVerticalGroup(
            jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, jPanel1Layout.createSequentialGroup()
                .addContainerGap()
                .addComponent(jLabel1)
                .addGap(29, 29, 29)
                .addComponent(jPanel2, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, 47, Short.MAX_VALUE)
                .addComponent(jComboBox1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addGap(26, 26, 26)
                .addComponent(jRadioButton1)
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
                .addComponent(jRadioButton2)
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
                .addComponent(jRadioButton3)
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
                .addComponent(jRadioButton4)
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
                .addComponent(jRadioButton5)
                .addGap(18, 18, 18)
                .addComponent(jButton1)
                .addGap(29, 29, 29))
        );

        javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
        getContentPane().setLayout(layout);
        layout.setHorizontalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addContainerGap()
                .addComponent(jPanel1, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                .addContainerGap())
        );
        layout.setVerticalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addContainerGap()
                .addComponent(jPanel1, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                .addContainerGap())
        );

        pack();
    }// </editor-fold>

    private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {

    }

    /**
     * @param args the command line arguments
     */
    public static void main(String args[]) {
        java.awt.EventQueue.invokeLater(new Runnable() {

            public void run() {
                new Gui().setVisible(true);
            }
        });
    }
    // Variables declaration - do not modify
    private javax.swing.ButtonGroup Consequence;
    private javax.swing.JButton jButton1;
    private javax.swing.JComboBox jComboBox1;
    private javax.swing.JLabel jLabel1;
    private javax.swing.JPanel jPanel1;
    private javax.swing.JPanel jPanel2;
    private javax.swing.JRadioButton jRadioButton1;
    private javax.swing.JRadioButton jRadioButton2;
    private javax.swing.JRadioButton jRadioButton3;
    private javax.swing.JRadioButton jRadioButton4;
    private javax.swing.JRadioButton jRadioButton5;
    // End of variables declaration
}

Answer 1

对于您当前手头的问题，简而言之，问题是如何在按下 JButton 时从 JComboBox 和 JRadioButton 集合中获取所选项目。您如何处理这些信息取决于您的程序逻辑，实际上不是这里的问题。要了解如何做到这一点，我建议您访问 Swing 教程以了解详细信息。简而言之，只需在组合框上调用 getSelectedItem 即可获得 JComboBox 中的选择。对于 JRadioButton 集合来说，这有点棘手，但我一直喜欢从将 JRadioButton 组合在一起的 ButtonGroup 中进行选择。下面的示例显示了此方法和组合框的方法:

import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.*;

public class GetInfoFromCombosRadios extends JPanel {
   private static final String[] STUFF_A = {"Monday", "Tuesday", "Wednesday", "Thursday", "Friday"};
   private static final String[] STUFF_B = {"Fe", "Fi", "Fo", "Fum"};
   private JComboBox comboStuffA = new JComboBox(STUFF_A);
   private ButtonGroup btnGroupStuffB = new ButtonGroup();

   public GetInfoFromCombosRadios() {
      JPanel radioPanel = new JPanel(new GridLayout(0, 1, 0, 5));
      for (String stuffB : STUFF_B) {
         JRadioButton radioBtn = new JRadioButton(stuffB);
         radioBtn.setActionCommand(stuffB);
         btnGroupStuffB.add(radioBtn);
         radioPanel.add(radioBtn);
      }

      JPanel comboPanel = new JPanel();
      comboPanel.add(comboStuffA);

      JButton doItBtn = new JButton("Do It!");
      doItBtn.addActionListener(new ActionListener() {
         public void actionPerformed(ActionEvent arg0) {
            doItActionPerformed();
         }
      });
      JPanel doItBtnPanel = new JPanel();
      doItBtnPanel.add(doItBtn);

      setLayout(new BoxLayout(this, BoxLayout.PAGE_AXIS));
      add(comboPanel);
      add(radioPanel);
      add(doItBtnPanel);
   }

   private void doItActionPerformed() {
      String comboSelection = comboStuffA.getSelectedItem().toString();
      System.out.println("Combo Selection: " + comboSelection);

      String radioSelection = "";
      ButtonModel selectedBtnModel = btnGroupStuffB.getSelection();
      if (selectedBtnModel == null) {
         radioSelection = "No radio button selected yet";
      } else {
         radioSelection = selectedBtnModel.getActionCommand();
      }
      System.out.println("Radio selection: " + radioSelection);
   }

   private static void createAndShowUI() {
      JFrame frame = new JFrame("GetInfoFromCombosRadios");
      frame.getContentPane().add(new GetInfoFromCombosRadios());
      frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
      frame.pack();
      frame.setLocationRelativeTo(null);
      frame.setVisible(true);
   }

   public static void main(String[] args) {
      java.awt.EventQueue.invokeLater(new Runnable() {
         public void run() {
            createAndShowUI();
         }
      });
   }
}