Avatar for Username

ค้นหาฝ่ายสนับสนุน

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

หัวข้อนี้ถูกเก็บถาวรแล้ว โปรดถามคำถามใหม่หากคุณต้องการความช่วยเหลือ

Java – Applet doesn’t work on Firefox when usign ForkJoinPool (while in Eclipse works)

  • 3 การตอบกลับ
  • 2 คนมีปัญหานี้
  • 1 ครั้งที่ดู
  • ตอบกลับล่าสุดโดย Farco

Farco
Farco
more options

when I run the following code on Eclipse (Luna, java vers=8), the code runs and pops-up the two errors messages. On the other hand, when I embed the code in a html page the code shows only the first error message. It seems that calling the ForkJoinPool class crushes the applet on firefox. Do you know why? Here is the code.

import java.awt.BorderLayout; import java.awt.Container; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.util.concurrent.ForkJoinPool;

import javax.swing.JApplet; import javax.swing.JButton; import javax.swing.JFrame; import javax.swing.JLabel; import javax.swing.JOptionPane; import javax.swing.JPanel; import javax.swing.SwingUtilities;

public class ProvaVera extends JApplet { 

   public void start() 
   {

       SwingUtilities.invokeLater(new Runnable(){
       public void run() 
           {
               MainPanel panel = new MainPanel();      
               // Add Swing components to content pane
               Container c = getContentPane();
               c.add(panel, BorderLayout.CENTER);
           }
       });

   }

} class MainPanel extends JPanel { 

   public MainPanel()
   {
       JLabel label1 = new JLabel("label1");
       this.add(label1);
       JButton btn1 = new JButton("button1");
       this.add(btn1);

       btn1.addActionListener  (
               new ActionListener() 
               {
                   public void actionPerformed(ActionEvent e)
                   {
                       metodo();
                   }
               }

               );
   }



   public void metodo()
   {
       JOptionPane.showMessageDialog(new JFrame(), "test1", "Dialog", JOptionPane.ERROR_MESSAGE);
       ForkJoinPool pool = new ForkJoinPool();
       JOptionPane.showMessageDialog(new JFrame(), "test2", "Dialog", JOptionPane.ERROR_MESSAGE);
   }

}


and here there is the index.html file that embeds the java applet

<applet code="ProvaVera.class" width="800" height="680" <param name="permissions" value="all-permissions" />> </applet>


Thank you in advance

when I run the following code on Eclipse (Luna, java vers=8), the code runs and pops-up the two errors messages. On the other hand, when I embed the code in a html page the code shows only the first error message. It seems that calling the ForkJoinPool class crushes the applet on firefox. Do you know why? Here is the code. import java.awt.BorderLayout; import java.awt.Container; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.util.concurrent.ForkJoinPool; import javax.swing.JApplet; import javax.swing.JButton; import javax.swing.JFrame; import javax.swing.JLabel; import javax.swing.JOptionPane; import javax.swing.JPanel; import javax.swing.SwingUtilities; public class ProvaVera extends JApplet { public void start() { SwingUtilities.invokeLater(new Runnable(){ public void run() { MainPanel panel = new MainPanel(); // Add Swing components to content pane Container c = getContentPane(); c.add(panel, BorderLayout.CENTER); } }); } } class MainPanel extends JPanel { public MainPanel() { JLabel label1 = new JLabel("label1"); this.add(label1); JButton btn1 = new JButton("button1"); this.add(btn1); btn1.addActionListener ( new ActionListener() { public void actionPerformed(ActionEvent e) { metodo(); } } ); } public void metodo() { JOptionPane.showMessageDialog(new JFrame(), "test1", "Dialog", JOptionPane.ERROR_MESSAGE); ForkJoinPool pool = new ForkJoinPool(); JOptionPane.showMessageDialog(new JFrame(), "test2", "Dialog", JOptionPane.ERROR_MESSAGE); } } and here there is the index.html file that embeds the java applet <html> <body> <applet code="ProvaVera.class" width="800" height="680" <param name="permissions" value="all-permissions" />> </applet> </body> </html> Thank you in advance

การตอบกลับทั้งหมด (3)

Oxylatium
Oxylatium
more options

Please, could provide a self-contained minimal testcase working on a public page., so we could test on our side.

Farco
Farco เจ้าของคำถาม
more options

Hello Oxylatium thank you for your answer,

as you said I put the example on a public page: 

     http://latastiera.altervista.org/

but it seems that it does NOT work.

เปลี่ยนแปลงโดย Farco เมื่อ

Farco
Farco เจ้าของคำถาม
more options

I have enabled the Java console from the java control panel. And the error was: java.security.AccessControlException: access denied ("java.lang.RuntimePermission" "modifyThread")

So I went to my java.policy file located in java.home/lib/security/ and I wrote the following

grant codeBase "url or file where the applet is" { permission java.lang.RuntimePermission "modifyThread"; };

And now the applet is working.

Again, thank you for your support.