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SurveySystem | 基于Java Web的在线问卷调查系统

 by   SingleX Java Version: Current License: No License

 by   SingleX Java Version: Current License: No License

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kandi X-RAY | SurveySystem Summary

SurveySystem is a Java library. SurveySystem has no bugs, it has no vulnerabilities and it has low support. However SurveySystem build file is not available. You can download it from GitHub.
基于Java Web的在线问卷调查系统
Support
Support
Quality
Quality
Security
Security
License
License
Reuse
Reuse

kandi-support Support

  • SurveySystem has a low active ecosystem.
  • It has 22 star(s) with 31 fork(s). There are 5 watchers for this library.
  • It had no major release in the last 12 months.
  • There are 3 open issues and 0 have been closed. On average issues are closed in 742 days. There are no pull requests.
  • It has a neutral sentiment in the developer community.
  • The latest version of SurveySystem is current.
SurveySystem Support
Best in #Java
Average in #Java
SurveySystem Support
Best in #Java
Average in #Java

quality kandi Quality

  • SurveySystem has 0 bugs and 0 code smells.
SurveySystem Quality
Best in #Java
Average in #Java
SurveySystem Quality
Best in #Java
Average in #Java

securitySecurity

  • SurveySystem has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.
  • SurveySystem code analysis shows 0 unresolved vulnerabilities.
  • There are 0 security hotspots that need review.
SurveySystem Security
Best in #Java
Average in #Java
SurveySystem Security
Best in #Java
Average in #Java

license License

  • SurveySystem does not have a standard license declared.
  • Check the repository for any license declaration and review the terms closely.
  • Without a license, all rights are reserved, and you cannot use the library in your applications.
SurveySystem License
Best in #Java
Average in #Java
SurveySystem License
Best in #Java
Average in #Java

buildReuse

  • SurveySystem releases are not available. You will need to build from source code and install.
  • SurveySystem has no build file. You will be need to create the build yourself to build the component from source.
SurveySystem Reuse
Best in #Java
Average in #Java
SurveySystem Reuse
Best in #Java
Average in #Java
Top functions reviewed by kandi - BETA

kandi has reviewed SurveySystem and discovered the below as its top functions. This is intended to give you an instant insight into SurveySystem implemented functionality, and help decide if they suit your requirements.

  • Gets users .
    • Init database .
      • Finds a Paper by PaperId
        • Select questions by a given paper .
          • Finds a user by name .
            • Find questions by question ID
              • Handle a POST request .
                • Return the login info for the specified user
                  • Delete a Paper by user id
                    • Find all users .

                      Get all kandi verified functions for this library.

                      Get all kandi verified functions for this library.

                      SurveySystem Key Features

                      基于Java Web的在线问卷调查系统

                      JProgressbar doesn't display when invoked from an ActionListener

                      copy iconCopydownload iconDownload
                      private void Process() {
                          jpcProgressIndicator pi = new jpcProgressIndicator();
                          pi.setTitle("Progress of Growth & Persistency");
                          pi.Update(0); // initialize
                          pi.Show(true);
                      
                          Thread t = new Thread(new Runnable(){
                              public void run() {
                      
                                  int nCounter = 0;
                                  // for (int i = 0; i <= MAX; i++) {
                                  while (nCounter < 100 ) {
                                      // final int currentValue = i;
                                      final int currentValue = nCounter;
                      
                                      try {
                                          SwingUtilities.invokeLater(new Runnable() {
                                              public void run() {
                                                  pi.Update(currentValue);
                                              }
                                          });
                                          java.lang.Thread.sleep(100);
                                      } catch (InterruptedException e) {
                                          System.out.println("Error: " + e.getMessage());
                                      }
                                      nCounter++;
                                  }
                                  pi.Close();     
                              }
                          });
                          t.start();
                      
                      }
                      

                      Community Discussions

                      Trending Discussions on SurveySystem
                      • JProgressbar doesn't display when invoked from an ActionListener
                      Trending Discussions on SurveySystem

                      QUESTION

                      JProgressbar doesn't display when invoked from an ActionListener

                      Asked 2021-Apr-01 at 16:24

                      I have a generic Java class for a simple progress indicator. It works fine if invoked directly (e.g. from main() or from a class constructor). But I can't get it to work when I create a simple menu and invoke it from an ActionListener associated with a menu item.

                      Here's the generic progress indicator class:

                      import java.awt.FlowLayout;
                      
                      import javax.swing.JFrame;
                      import javax.swing.JProgressBar;
                      import javax.swing.JTextField;
                      
                      public class jpcProgressIndicator {
                          final int MAX = 100;
                          private JFrame frame = new JFrame("Progress Indicator");
                      
                          // creates progress bar
                          final JProgressBar pb = new JProgressBar();
                          final JTextField tf = new JTextField();
                          
                          public jpcProgressIndicator() {
                              pb.setMinimum(0);
                              pb.setMaximum(MAX);
                              pb.setStringPainted(true);
                      
                              // add progress bar
                              frame.setLayout(new FlowLayout());
                              frame.getContentPane().add(pb);
                              // frame.getContentPane().add(tf);
                      
                              frame.setDefaultCloseOperation(JFrame.DO_NOTHING_ON_CLOSE);
                              frame.setSize(300, 70);
                              frame.setLocationRelativeTo(null);      
                          }
                          
                          public void Update( int nValue) {
                              pb.setValue(nValue);
                          }
                          
                          public void Show( boolean flag) {
                              if(flag == true) {
                                  this.frame.setVisible(true);
                                  this.pb.setVisible(true);
                              } else {
                                  this.pb.setVisible(false);
                              }
                          }
                          public int getValue() {
                              return this.pb.getValue();
                          }
                      
                          public void setTitle(String strTitle) {
                              this.frame.setTitle(strTitle);
                          }
                          
                          public void Close() {
                              frame.dispose(); 
                          }
                      }
                      

                      The test program from which I'm invoking this is:

                      import java.awt.event.ActionEvent;
                      import java.awt.event.ActionListener;
                      import javax.swing.*;
                      import SurveySystem.Data.jpcProgressIndicator;
                       
                      public class Main2 implements ActionListener {
                          final int MAX = 100;
                          jpcProgressIndicator pi;    
                          JFrame frame;    
                          JMenuBar mb;
                          JMenuItem myMenuItem;
                          
                          Main2() {
                              // Process();
                              
                              // create the basic frame window for a menu
                              frame=new JFrame("Survey System");
                              // Create a menu item
                              myMenuItem = new JMenuItem("Process");
                              // add an actionlistener for this menu item
                              myMenuItem.addActionListener(this);
                              // create a menu bar
                              mb=new JMenuBar();
                              // add menu item to menu bar
                              mb.add(myMenuItem);             
                              // add the menu bar to the frame
                              frame.add(mb);
                              
                              frame.setJMenuBar(mb);
                              // set frame size
                              frame.setSize(800,400);     
                              // center the frame on the screen
                              frame.setLocationRelativeTo(null);
                              // make the frame visible
                              frame.setVisible(true);
                          }
                       
                          public static void main(String[] args) {
                              new Main2();
                          }
                          
                          private void Process() {
                              pi = new jpcProgressIndicator();
                              pi.setTitle("Progress of Growth & Persistency");
                              pi.Update(0); // initialize
                              pi.Show(true);
                      
                              int nCounter = 0;
                              // for (int i = 0; i <= MAX; i++) {
                              while (nCounter < 100 ) {
                                  // final int currentValue = i;
                                  final int currentValue = nCounter;
                      
                                  try {
                                      SwingUtilities.invokeLater(new Runnable() {
                                          public void run() {
                                              pi.Update(currentValue);
                                          }
                                      });
                                      java.lang.Thread.sleep(100);
                                  } catch (InterruptedException e) {
                                      System.out.println("Error: " + e.getMessage());
                                  }
                                  nCounter++;
                              }
                              pi.Close();     
                          }
                      
                          @Override
                          public void actionPerformed(ActionEvent e) {        
                              if(e.getSource() == myMenuItem)         
                                  Process();      
                          }
                      }
                      

                      The test method Process loops and updates the progress bar. I have commented out an invocation that, if uncommented, shows that all the code is working. But if I invoke it from the menu item, the frame appears but not the progress bar.

                      Anyone know what I'm doing wrong?

                      ANSWER

                      Answered 2021-Apr-01 at 16:24

                      actionPerformed is actually executed by EDT, so all invokeLater calls are queued and called after the pi.Close so that you can't see the progressbar update.

                      Here is how I modified your Process method to "take the counter out of EDT":

                      private void Process() {
                          jpcProgressIndicator pi = new jpcProgressIndicator();
                          pi.setTitle("Progress of Growth & Persistency");
                          pi.Update(0); // initialize
                          pi.Show(true);
                      
                          Thread t = new Thread(new Runnable(){
                              public void run() {
                      
                                  int nCounter = 0;
                                  // for (int i = 0; i <= MAX; i++) {
                                  while (nCounter < 100 ) {
                                      // final int currentValue = i;
                                      final int currentValue = nCounter;
                      
                                      try {
                                          SwingUtilities.invokeLater(new Runnable() {
                                              public void run() {
                                                  pi.Update(currentValue);
                                              }
                                          });
                                          java.lang.Thread.sleep(100);
                                      } catch (InterruptedException e) {
                                          System.out.println("Error: " + e.getMessage());
                                      }
                                      nCounter++;
                                  }
                                  pi.Close();     
                              }
                          });
                          t.start();
                      
                      }
                      

                      Source https://stackoverflow.com/questions/66907603

                      Community Discussions, Code Snippets contain sources that include Stack Exchange Network

                      Vulnerabilities

                      No vulnerabilities reported

                      Install SurveySystem

                      You can download it from GitHub.
                      You can use SurveySystem like any standard Java library. Please include the the jar files in your classpath. You can also use any IDE and you can run and debug the SurveySystem component as you would do with any other Java program. Best practice is to use a build tool that supports dependency management such as Maven or Gradle. For Maven installation, please refer maven.apache.org. For Gradle installation, please refer gradle.org .

                      Support

                      For any new features, suggestions and bugs create an issue on GitHub. If you have any questions check and ask questions on community page Stack Overflow .

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