The vertically scrolling `ScrollView` should not contain another vertically scrolling widget (`ListView`)

这个警告提示你不应该将一个`ListView`放在一个`ScrollView`中，因为它们都是垂直滚动的控件，这样可能会导致滚动冲突，出现意想不到的错误。

如果你需要在一个可滚动的视图中显示一个列表，推荐使用`ListView`本身的滚动能力，而不是将它放入一个`ScrollView`中。如果你需要在`ListView`之上或之下放置其他的控件，你可以使用`ListView`的`header`和`footer`属性来实现。如果你需要在`ListView`中间插入其他类型的视图，你可以使用`ListView`的`builder`属性，将其作为一个特殊的列表项来显示。

相关问题

A random number of Rabbit images ranging from 1 to 10 are displayed for each operand and the user is expected to enter the values of the two operands and the result of adding the two operands, in the given text fields. When the user clicks on the button ‘Check!’, one of two things can happen: Case 1: all three input values are correct i) the text changes to ‘"Correct! Have another go?"’. ii) the number of Rabbit images displayed for each of the two operands changes. See Figure 2 for an example. iii) the three text fields are reset (i.e. they are made empty). 2/5 Case 2: at least one of the input values entered is incorrect i) the text changes to ‘Wrong! Try again!’. ii) the number of Rabbit images displayed does NOT change. iii) the text fields do NOT change.Implement SumItUp as a Java application. You application must satisfy ALL the specific requirements given below: a) The title of the top-level container must be ‘Welcome to SumItUp!’. b) The initial text should be ‘Enter two operands, result and click on 'Check!'’. See Figure 1. c) There should be no more than 4 Rabbit images per row. See Hint 1. d) The text fields should be wide enough to display at least TWO characters. e) The button ‘Check!’ must not resize when the GUI is resized. See Hint 2 and Figure 3. f) The ‘plus sign’ icon should appear vertically centered between the two sets of Rabbit images and must not resize when the GUI is resized. See Hint 2 and Figure 3. g) When first launched and whenever a correct answer is given, the number of displayed Rabbit images for each operand should change to any number between 1 and 10 (inclusive). See Hint 3 and Hint 4. Note: It is possible for the next number(s) to be the same as the current number(s). h) Nothing should happen if the user clicks the ‘Check!’ button while at least one of the text fields are empty, i.e. no errors should be thrown in this case. Note: You can assume that only a numeric value will be entered into the text fields.

Sure, I can help you with that. Here's the Java code for the SumItUp application:

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

public class SumItUp extends JFrame implements ActionListener {
    private JPanel topPanel, centerPanel, bottomPanel;
    private JLabel rabbitLabel1, rabbitLabel2, plusLabel, equalsLabel, resultLabel;
    private JTextField operand1Field, operand2Field, resultField;
    private JButton checkButton;
    private int rabbitCount1, rabbitCount2;

    public SumItUp() {
        setTitle("Welcome to SumItUp!");
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setSize(500, 300);

        // Create top panel
        topPanel = new JPanel();
        topPanel.add(new JLabel("Enter two operands, result and click on 'Check!'"));
        add(topPanel, BorderLayout.NORTH);

        // Create center panel
        centerPanel = new JPanel(new GridLayout(1, 5, 10, 10));
        rabbitCount1 = (int) (Math.random() * 10) + 1;
        rabbitCount2 = (int) (Math.random() * 10) + 1;
        for (int i = 0; i < rabbitCount1; i++) {
            centerPanel.add(new JLabel(new ImageIcon("rabbit.png")));
        }
        plusLabel = new JLabel(new ImageIcon("plus.png"));
        plusLabel.setVerticalAlignment(JLabel.CENTER);
        centerPanel.add(plusLabel);
        for (int i = 0; i < rabbitCount2; i++) {
            centerPanel.add(new JLabel(new ImageIcon("rabbit.png")));
        }
        equalsLabel = new JLabel(new ImageIcon("equals.png"));
        equalsLabel.setVerticalAlignment(JLabel.CENTER);
        centerPanel.add(equalsLabel);
        resultField = new JTextField(2);
        centerPanel.add(resultField);
        add(centerPanel, BorderLayout.CENTER);

        // Create bottom panel
        bottomPanel = new JPanel(new GridLayout(1, 4, 10, 10));
        rabbitLabel1 = new JLabel(rabbitCount1 + " rabbits");
        bottomPanel.add(rabbitLabel1);
        operand1Field = new JTextField(2);
        bottomPanel.add(operand1Field);
        bottomPanel.add(new JLabel("+"));
        operand2Field = new JTextField(2);
        bottomPanel.add(operand2Field);
        rabbitLabel2 = new JLabel(rabbitCount2 + " rabbits");
        bottomPanel.add(rabbitLabel2);
        resultLabel = new JLabel("");
        bottomPanel.add(resultLabel);
        checkButton = new JButton("Check!");
        checkButton.addActionListener(this);
        bottomPanel.add(checkButton);
        add(bottomPanel, BorderLayout.SOUTH);

        setVisible(true);
    }

    public void actionPerformed(ActionEvent e) {
        if (e.getSource() == checkButton) {
            if (!operand1Field.getText().equals("") && !operand2Field.getText().equals("")
                    && !resultField.getText().equals("")) {
                int operand1 = Integer.parseInt(operand1Field.getText());
                int operand2 = Integer.parseInt(operand2Field.getText());
                int result = Integer.parseInt(resultField.getText());
                if (operand1 + operand2 == result) {
                    rabbitCount1 = (int) (Math.random() * 10) + 1;
                    rabbitCount2 = (int) (Math.random() * 10) + 1;
                    centerPanel.removeAll();
                    for (int i = 0; i < rabbitCount1; i++) {
                        centerPanel.add(new JLabel(new ImageIcon("rabbit.png")));
                    }
                    plusLabel = new JLabel(new ImageIcon("plus.png"));
                    plusLabel.setVerticalAlignment(JLabel.CENTER);
                    centerPanel.add(plusLabel);
                    for (int i = 0; i < rabbitCount2; i++) {
                        centerPanel.add(new JLabel(new ImageIcon("rabbit.png")));
                    }
                    equalsLabel = new JLabel(new ImageIcon("equals.png"));
                    equalsLabel.setVerticalAlignment(JLabel.CENTER);
                    centerPanel.add(equalsLabel);
                    resultField.setText("");
                    operand1Field.setText("");
                    operand2Field.setText("");
                    rabbitLabel1.setText(rabbitCount1 + " rabbits");
                    rabbitLabel2.setText(rabbitCount2 + " rabbits");
                    resultLabel.setText("Correct! Have another go?");
                } else {
                    resultLabel.setText("Wrong! Try again!");
                }
            }
        }
    }

    public static void main(String[] args) {
        SumItUp app = new SumItUp();
    }
}

Note: This code assumes that you have images named "rabbit.png", "plus.png", and "equals.png" in the same directory as your Java source file. If you want to use different images, you'll need to modify the code accordingly.

Generate a semantic HTML and Tailwind CSS "Contact Support" form consisting of the user's name, email, issue type, and message. The form elements should be stacked vertically and placed inside a card.

Sure, here's an example of a semantic HTML and Tailwind CSS "Contact Support" form:

<div class="bg-white shadow-md rounded-md p-6">
  <h2 class="text-lg font-medium mb-4">Contact Support</h2>
  <form class="grid gap-4">
    <div>
      <label for="name" class="block text-sm font-medium text-gray-700 mb-2">Name</label>
      <input id="name" type="text" name="name" class="w-full border-gray-300 rounded-md shadow-sm focus:border-indigo-500 focus:ring focus:ring-indigo-500 focus:ring-opacity-50" required>
    </div>
    <div>
      <label for="email" class="block text-sm font-medium text-gray-700 mb-2">Email</label>
      <input id="email" type="email" name="email" class="w-full border-gray-300 rounded-md shadow-sm focus:border-indigo-500 focus:ring focus:ring-indigo-500 focus:ring-opacity-50" required>
    </div>
    <div>
      <label for="issue-type" class="block text-sm font-medium text-gray-700 mb-2">Issue Type</label>
      <select id="issue-type" name="issue-type" class="w-full border-gray-300 rounded-md shadow-sm focus:border-indigo-500 focus:ring focus:ring-indigo-500 focus:ring-opacity-50" required>
        <option value="">Select an issue type</option>
        <option value="billing">Billing</option>
        <option value="technical">Technical</option>
        <option value="other">Other</option>
      </select>
    </div>
    <div>
      <label for="message" class="block text-sm font-medium text-gray-700 mb-2">Message</label>
      <textarea id="message" name="message" rows="4" class="w-full border-gray-300 rounded-md shadow-sm focus:border-indigo-500 focus:ring focus:ring-indigo-500 focus:ring-opacity-50" required></textarea>
    </div>
    <div>
      <button type="submit" class="inline-flex items-center px-4 py-2 border border-transparent text-base font-medium rounded-md text-white bg-indigo-600 hover:bg-indigo-700 focus:outline-none focus:ring-2 focus:ring-offset-2 focus:ring-indigo-500">
        Submit
      </button>
    </div>
  </form>
</div>

In this example, the form is contained within a `div` with a white background, a shadow, and rounded corners. The form includes a heading, a grid of form elements, and a submit button. Each form element has a label and input or select element, and all elements have appropriate Tailwind CSS classes to style them. The form is responsive and will adjust to different screen sizes.