Java JOptionPane单个输入中的多个输入和算术运算

Question

I've started taking a class about Java and just have learned about JOptionPane and we did some arithmetic operations with the inputs given by the user in an input dialog window but different dialog boxes for each input and then do the operations and show to the user the output in a message box. 我已经开始学习有关Java的课程，并且刚刚学习了JOptionPane，我们对用户在输入对话框窗口中提供的输入进行了一些算术运算，但每个输入都使用了不同的对话框，然后进行操作并显示给用户在消息框中的输出。

What I'd like to know is, how to get all the inputs from a user in just one box and show the output to the user in a message box? 我想知道的是，如何仅在一个框中获得用户的所有输入，并在消息框中将输出显示给用户？

Here is the code of the example we've worked on. 这是我们正在处理的示例的代码。

    double ap = 0.3;
    double op = 0.2;
    double fp = 0.5;


    String a = JOptionPane.showInputDialog(null,"Input A:");
    String b = JOptionPane.showInputDialog(null,"Input B:");
    String c = JOptionPane.showInputDialog(null,"Input C:");
    String d = JOptionPane.showInputDialog(null,"Input D:");

    double aValue =  (Double.parseDouble(a)*ap);
    double bcValue = (((Double.parseDouble(b)/2(Double.parseDouble(c)/2))*op);
    double fValue = (Double.parseDouble(d)*fp);

    double res = aValue+bcValue+fValue;


    JOptionPane.showMessageDialog(null,"Result : " +res);

Answer 1

Well...if you want to have several inputs in one dialog then you can use the JOptionPane.showConfirmDialog() method and supply it with a custom JPanel (some examples here). 好吧...如果您希望在一个对话框中有多个输入，则可以使用JOptionPane.showConfirmDialog（）方法并为其提供自定义JPanel（此处提供一些示例）。 In other words, you create a custom dialog. 换句话说，您将创建一个自定义对话框。

In your case here is one way you can do it: 就您而言，这是一种实现方法：

String dialogMessage = "Please suppliy digits to the following<br>input boxes:";
int btns = JOptionPane.OK_CANCEL_OPTION;
BorderLayout layout = new BorderLayout();
JPanel panel = new JPanel(layout);
JLabel label = new JLabel("<html>" + dialogMessage + "<br><br><br></html>");
panel.add(label, BorderLayout.NORTH);

JPanel p = new JPanel(new BorderLayout(5, 5));
JPanel labels = new JPanel(new GridLayout(0, 1, 2, 2));
labels.add(new JLabel("Input A", SwingConstants.RIGHT));
labels.add(new JLabel("Input B", SwingConstants.RIGHT));
labels.add(new JLabel("Input C", SwingConstants.RIGHT));
labels.add(new JLabel("Input D", SwingConstants.RIGHT));
p.add(labels, BorderLayout.WEST);

JPanel controls = new JPanel(new GridLayout(0, 1, 2, 2));
JTextField inputA = new JTextField();
controls.add(inputA);
JTextField inputB = new JTextField();
controls.add(inputB);
JTextField inputC = new JTextField();
controls.add(inputC);
JTextField inputD = new JTextField();
controls.add(inputD);
p.add(controls, BorderLayout.CENTER);
panel.add(p);

// Get Input from User...
int res = JOptionPane.showConfirmDialog(null, panel, "My Dialog Title", btns);
if (res == JOptionPane.OK_OPTION) {
    System.out.println("Input A is: " + inputA.getText());
    System.out.println("Input B is: " + inputB.getText());
    System.out.println("Input C is: " + inputC.getText());
    System.out.println("Input D is: " + inputD.getText());
}

You can modify this concept to suit your needs. 您可以修改此概念以适合您的需求。

Java JOptionPane单个输入中的多个输入和算术运算

问题描述

1 个解决方案

解决方案1
0 已采纳 2017-11-02 06:43:37

Java JOptionPane单个输入中的多个输入和算术运算

问题描述

1 个解决方案

解决方案1 0 已采纳 2017-11-02 06:43:37

解决方案1
0 已采纳 2017-11-02 06:43:37