meter和progress

`meter` 和 `progress` 都是 HTML 元素，用于显示进度条。它们的区别在于：

- `meter` 元素是 HTML5 中新增的元素，用于表示已知范围内的数值。它有以下属性：
- `value`：表示当前值，必需属性。
- `min`：表示最小值，默认为 0。
- `max`：表示最大值，默认为 1。
- `low`：表示低阈值，如果当前值小于低阈值，显示颜色会改变，默认为最小值。
- `high`：表示高阈值，如果当前值大于高阈值，显示颜色会改变，默认为最大值。
- `optimum`：表示最佳值，如果当前值等于最佳值，显示颜色会改变，默认为中间值。
- `progress` 元素是 HTML5 中也新增的元素，用于表示进度。它只有一个属性：
- `value`：表示当前进度，必需属性。

使用时可以根据实际需求选择使用哪一个元素。

相关问题

Use java to write a program to display a progress meter . The meter consists of a window with a column of 11 labels. The first 10 labels indicate progress steps of 10% and are initially red. The bottom label shows the amount of activity remaining as a textual percentage, and is initially set to “0%”.

Certainly! Here's a Java program that creates a progress meter as described:

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

public class ProgressMeter extends JFrame {
    private JLabel[] progressSteps;
    private JLabel remainingLabel;

    public ProgressMeter() {
        super("Progress Meter");
        setSize(200, 400);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        // create the progress step labels
        progressSteps = new JLabel[10];
        for (int i = 0; i < progressSteps.length; i++) {
            progressSteps[i] = new JLabel();
            progressSteps[i].setPreferredSize(new Dimension(100, 20));
            progressSteps[i].setOpaque(true);
            progressSteps[i].setBackground(Color.RED);
            add(progressSteps[i]);
        }

        // create the remaining activity label
        remainingLabel = new JLabel("0%");
        remainingLabel.setPreferredSize(new Dimension(100, 20));
        add(remainingLabel, BorderLayout.SOUTH);

        setVisible(true);
    }

    public void updateProgress(int percentComplete) {
        // update the progress step labels
        int numProgressSteps = progressSteps.length;
        int numCompletedSteps = (int) Math.ceil(percentComplete * numProgressSteps / 100.0);
        for (int i = 0; i < numCompletedSteps; i++) {
            progressSteps[i].setBackground(Color.GREEN);
        }

        // update the remaining activity label
        remainingLabel.setText(percentComplete + "%");
    }

    public static void main(String[] args) throws InterruptedException {
        ProgressMeter progressMeter = new ProgressMeter();

        // simulate progress
        int percentComplete = 0;
        while (percentComplete <= 100) {
            progressMeter.updateProgress(percentComplete);
            Thread.sleep(1000);
            percentComplete += 10;
        }
    }
}

This program creates a `JFrame` with a column of 10 `JLabel`s representing the progress steps, and a bottom `JLabel` showing the remaining activity as a percentage. The `updateProgress` method updates the progress step labels and remaining activity label based on the given percentage. The `main` method simulates progress by updating the progress meter every second for 10 iterations, with each iteration representing 10% progress.

Use java to write a program to display a progress meter as follows. The meter consists of a window with a column of 11 labels. The first 10 labels indicate progress steps of 10% and are initially red. The bottom label shows the amount of activity remaining as a textual percentage, and is initially set to “0%”.

Sure, here's a Java program that displays a progress meter as described:

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

public class ProgressMeter extends JFrame {
    private JLabel[] steps;
    private JLabel remaining;

    public ProgressMeter() {
        setTitle("Progress Meter");
        setSize(200, 400);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        // create the labels for the progress steps
        steps = new JLabel[10];
        for (int i = 0; i < 10; i++) {
            steps[i] = new JLabel(" ");
            steps[i].setPreferredSize(new Dimension(100, 20));
            steps[i].setOpaque(true);
            steps[i].setBackground(Color.RED);
            add(steps[i]);
        }

        // create the label for remaining activity
        remaining = new JLabel("0%");
        remaining.setPreferredSize(new Dimension(100, 20));
        add(remaining, BorderLayout.SOUTH);

        setVisible(true);
    }

    public void updateProgress(int percent) {
        // update the progress steps
        int stepsCompleted = percent / 10;
        for (int i = 0; i < stepsCompleted; i++) {
            steps[i].setBackground(Color.GREEN);
        }

        // update the remaining activity label
        remaining.setText(percent + "%");
    }

    public static void main(String[] args) {
        ProgressMeter meter = new ProgressMeter();

        // simulate progress by updating the meter every second
        for (int i = 0; i <= 100; i++) {
            try {
                Thread.sleep(1000);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
            meter.updateProgress(i);
        }
    }
}

This program creates a `JFrame` with a column of 10 `JLabel`s representing the progress steps, and a bottom `JLabel` showing the remaining activity as a percentage. The `updateProgress` method updates the progress steps and remaining activity label based on the given percentage. To simulate progress, the `main` method updates the meter every second for 100 seconds.