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我有一個問題。我的飛濺程序沒有運行。請原諒我，我是新和不能把代碼properly.i想想我的計時器代碼是錯誤的。任何幫助將不勝感激。我與數據庫的連接工作得很好。進度不開始定時器在Java中
我潑代碼
package Splash_package;
import DataConnection.connection;
import Mainframe.main_frame;
import java.awt.Color;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.sql.DriverManager;
import java.sql.ResultSet;
import javax.swing.JOptionPane;
import javax.swing.Timer;
/**
*
* @author Aaqib Jan
*/
public class Splash extends javax.swing.JFrame {
/**
* Creates new form splash
*/
public Splash() {
initComponents();
}
connection cn=new connection();
Timer tm = new Timer(500, new ActionListener() {
@Override
public void actionPerformed(ActionEvent ae) {
count+=5;
if(count==10)
{
jLabel2.setText("Initializing");
jProgressBar1.setStringPainted(true);
jProgressBar1.setValue(10);
}
if (count == 20) {
try {
Class.forName(cn.classname);
jLabel2.setText("Loading ...");
jProgressBar1.setValue(20);
} catch (Exception ex) {
JOptionPane.showMessageDialog(null, ex.getStackTrace());
System.exit(0);
}
}
if (count == 30) {
try {
cn.con = DriverManager.getConnection(cn.url);
jLabel2.setText("Checking database ...");
jProgressBar1.setValue(30);
} catch (Exception ex) {
JOptionPane.showMessageDialog(null, ex.getStackTrace());
System.exit(0);
}
}
if (count == 40) {
try {
cn.st = cn.con.createStatement(ResultSet.TYPE_SCROLL_INSENSITIVE, ResultSet.CONCUR_READ_ONLY);
jLabel2.setText("Finding resources ...");
jProgressBar1.setValue(40);
} catch (Exception ex) {
JOptionPane.showMessageDialog(null, ex.getStackTrace());
System.exit(0);
}
}
if (count == 50) {
try {
cn.rs = cn.st.executeQuery("select * from usertable");
jLabel2.setText("Checking Errors ...");
jProgressBar1.setValue(50);
} catch (Exception ex) {
JOptionPane.showMessageDialog(null, ex.getStackTrace());
System.exit(0);
}
}
if (count == 60) {
try {
cn.rs = cn.st.executeQuery("select * from labourinfo");
jLabel2.setText("No Error Getting ...");
jProgressBar1.setValue(60);
} catch (Exception ex) {
JOptionPane.showMessageDialog(null, ex.getStackTrace());
System.exit(0);
}
}
if (count == 70) {
try {
cn.rs = cn.st.executeQuery("select * from salarygrade");
jLabel2.setText("Checking Modules ...");
jProgressBar1.setValue(70);
} catch (Exception ex) {
JOptionPane.showMessageDialog(null, ex.getStackTrace());
System.exit(0);
}
}
if (count == 80) {
try {
cn.rs = cn.st.executeQuery("select * from labourattendence");
jLabel2.setText("Almost Finish ...");
jProgressBar1.setValue(80);
} catch (Exception ex) {
JOptionPane.showMessageDialog(null, ex.getStackTrace());
System.exit(0);
}
}
if (count == 90) {
try {
cn.rs = cn.st.executeQuery("select * from labourattendence");
jLabel2.setText("Starting ...");
jProgressBar1.setValue(90);
} catch (Exception ex) {
JOptionPane.showMessageDialog(null, ex.getStackTrace());
}
}
if(count==95){
jProgressBar1.setValue(100);
}
if (count == 100) {
main_frame main = new main_frame();
main.show();
dispose();
}
}
});
@SuppressWarnings("unchecked")
// <editor-fold defaultstate="collapsed" desc="Generated Code">
private void initComponents() {
jProgressBar1 = new javax.swing.JProgressBar();
jLabel1 = new javax.swing.JLabel();
jLabel2 = new javax.swing.JLabel();
setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
jLabel1.setText("jLabel1");
jLabel2.setText("jLabel2");
javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
getContentPane().setLayout(layout);
layout.setHorizontalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addGap(207, 207, 207)
.addComponent(jProgressBar1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
.addGroup(layout.createSequentialGroup()
.addGap(89, 89, 89)
.addComponent(jLabel1)))
.addContainerGap(307, Short.MAX_VALUE))
.addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()
.addGap(0, 0, Short.MAX_VALUE)
.addComponent(jLabel2)
.addGap(217, 217, 217))
);
layout.setVerticalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addGap(57, 57, 57)
.addComponent(jLabel2)
.addGap(37, 37, 37)
.addComponent(jLabel1)
.addGap(59, 59, 59)
.addComponent(jProgressBar1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addContainerGap(230, Short.MAX_VALUE))
);
pack();
}// </editor-fold>
private void formWindowOpened(java.awt.event.WindowEvent evt) {
this.setLocationRelativeTo(null);
this.setBackground(new Color(0, 255, 0, 0));
tm.start();
}
/**
* @param args the command line arguments
*/
public static void main(String args[]) {
/* Set the Nimbus look and feel */
//<editor-fold defaultstate="collapsed" desc=" Look and feel setting code (optional) ">
/* If Nimbus (introduced in Java SE 6) is not available, stay with the default look and feel.
* For details see http://download.oracle.com/javase/tutorial/uiswing/lookandfeel/plaf.html
*/
try {
for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) {
if ("Nimbus".equals(info.getName())) {
javax.swing.UIManager.setLookAndFeel(info.getClassName());
break;
}
}
} catch (ClassNotFoundException ex) {
java.util.logging.Logger.getLogger(Splash.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (InstantiationException ex) {
java.util.logging.Logger.getLogger(Splash.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (IllegalAccessException ex) {
java.util.logging.Logger.getLogger(Splash.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (javax.swing.UnsupportedLookAndFeelException ex) {
java.util.logging.Logger.getLogger(Splash.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
}
//</editor-fold>
/* Create and display the form */
java.awt.EventQueue.invokeLater(new Runnable() {
@Override
public void run() {
new Splash().setVisible(true);
}
});
}
// Variables declaration - do not modify
private javax.swing.JLabel jLabel1;
private javax.swing.JLabel jLabel2;
private javax.swing.JProgressBar jProgressBar1;
// End of variables declaration
int count=0;
}
我的主類
import Splash_package.Splash;
/*
* To change this license header, choose License Headers in Project Properties.
* To change this template file, choose Tools | Templates
* and open the template in the editor.
*/
public class Main_Class {
public static void main(String[] args) {
new Splash().setVisible(true);
}
}
您可能希望有[併發在Swing（http://docs.oracle.com/javase/tutorial/uiswing/concurrency/）和[工作線程和SwingWorker類（HTTP的讀取：//文檔。 oracle.com/javase/tutorial/uiswing/concurrency/worker.html）。擺動'Timer'是不會做你想做的 – MadProgrammer