java - 将 J 框架转换为 JApplet

Question

我已经创建了一个java代码(jframe)，但我正在尝试将其转换为小程序，以便它可以出现在html网页上。由于我不太熟悉 java 编码，因此转换遇到困难。

这是到目前为止的代码:

 /**
  * Implements a program with a pie chart
 * that shows interactive polling results for three candidates
 */

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

  public class Poll extends JApplet {

         public void init() {
 public Poll()
   {

 super("Vote for Pat, Ismail, or Clair");
Container c = getContentPane();
c.setBackground(Color.WHITE);
PollDisplayPanel chart = new PollDisplayPanel("Pat", "Ismail", "Clair");
PollControlPanel controls = new PollControlPanel(chart);
c.add(chart, BorderLayout.CENTER);
c.add(controls, BorderLayout.SOUTH);

Poll w = new Poll();
}



        }
        }

这是原始的 Jframe 代码

/**
* Implements a program with a pie chart
* that shows interactive polling results for three candidates
*/

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

  public class Poll extends JFrame
 {
 public Poll()
  {
    super("Vote for Pat, Ismail, or Clair");

Container c = getContentPane();
c.setBackground(Color.WHITE);
PollDisplayPanel chart = new PollDisplayPanel("Pat", "Ismail", "Clair");
PollControlPanel controls = new PollControlPanel(chart);
c.add(chart, BorderLayout.CENTER);
c.add(controls, BorderLayout.SOUTH);
  }

   public static void main(String[] args)
  {
Poll w = new Poll();}
   w.setBounds(300, 300, 400, 400);
w.setDefaultCloseOperation(EXIT_ON_CLOSE);
w.setVisible(true);
  }
  }

Answer 1

您不能直接在另一个方法中定义方法。在这里，您已对小程序执行了相同的操作。里面init()您正在添加构造函数 Poll() .

 public void init() {

<罢工>

<罢工>

    public Poll() {
    super("Vote for Pat, Ismail, or Clair");

<罢工>

    Container c = getContentPane();
    c.setBackground(Color.WHITE);
    PollDisplayPanel chart = new PollDisplayPanel("Pat", "Ismail", "Clair");
    PollControlPanel controls = new PollControlPanel(chart);
    c.add(chart, BorderLayout.CENTER);
    c.add(controls, BorderLayout.SOUTH);

<罢工>

<罢工>

      Poll w = new Poll();
    }

<罢工>

 }