0
我试图在用户单击我的swing应用程序中的某些按钮时显示不确定的进度栏。我为进度条编写了一个泛型类，每次点击这些按钮时都会调用它。进度条窗口显示在任务栏中，但不显示在屏幕上。为什么会发生这种情况，我该如何解决？未显示java swing进度条
感谢您的任何帮助。
编辑：
SSCE我的应用程序：进度条类
package mainform;
public class ProgressBarIndeterminate extends javax.swing.JFrame {
public ProgressBarIndeterminate() {
initComponents();
}
private void initComponents() {
jProgressBar1 = new javax.swing.JProgressBar();
setDefaultCloseOperation(javax.swing.WindowConstants.DISPOSE_ON_CLOSE);
setAlwaysOnTop(true);
setBackground(new java.awt.Color(255, 255, 255));
setUndecorated(true);
setResizable(false);
jProgressBar1.setBackground(new java.awt.Color(255, 255, 255));
jProgressBar1.setForeground(new java.awt.Color(153, 255, 0));
jProgressBar1.setCursor(new java.awt.Cursor(java.awt.Cursor.WAIT_CURSOR));
jProgressBar1.setFocusable(false);
jProgressBar1.setIndeterminate(true);
javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
getContentPane().setLayout(layout);
layout.setHorizontalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(jProgressBar1, javax.swing.GroupLayout.PREFERRED_SIZE, 171, javax.swing.GroupLayout.PREFERRED_SIZE)
);
layout.setVerticalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(jProgressBar1, javax.swing.GroupLayout.PREFERRED_SIZE, 24, javax.swing.GroupLayout.PREFERRED_SIZE)
);
pack();
}
public static void main(String args[]) {
java.awt.EventQueue.invokeLater(new Runnable() {
public void run() {
new ProgressBarIndeterminate().setVisible(true);
}
});
}
private javax.swing.JProgressBar jProgressBar1;
}
类ViewRec：
package mainform;
public class ViewRec extends javax.swing.JFrame {
public ViewRec() {
initComponents();
try{
Thread.sleep(10000);
}
catch(Exception e){}
}
private void initComponents() {
jScrollPane1 = new javax.swing.JScrollPane();
jTable1 = new javax.swing.JTable();
setDefaultCloseOperation(javax.swing.WindowConstants.DISPOSE_ON_CLOSE);
setBackground(new java.awt.Color(255, 255, 255));
setResizable(false);
jTable1.setModel(new javax.swing.table.DefaultTableModel(
new Object [][] {
},
new String [] {
"E-Mail ID", "Customer Name", "City", "State", "Industry", "Priority"
}
) {
Class[] types = new Class [] {
java.lang.String.class, java.lang.String.class, java.lang.String.class, java.lang.String.class, java.lang.String.class, java.lang.String.class
};
boolean[] canEdit = new boolean [] {
false, false, false, false, false, false
};
public Class getColumnClass(int columnIndex) {
return types [columnIndex];
}
public boolean isCellEditable(int rowIndex, int columnIndex) {
return canEdit [columnIndex];
}
});
jScrollPane1.setViewportView(jTable1);
javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
getContentPane().setLayout(layout);
layout.setHorizontalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(jScrollPane1, javax.swing.GroupLayout.DEFAULT_SIZE, 912, Short.MAX_VALUE)
);
layout.setVerticalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(jScrollPane1, javax.swing.GroupLayout.DEFAULT_SIZE, 300, Short.MAX_VALUE)
);
pack();
}
private javax.swing.JScrollPane jScrollPane1;
private javax.swing.JTable jTable1;
}
类ComposeMail：
package mainform;
public class ComposeMail extends javax.swing.JFrame {
ProgressBarIndeterminate pbi=new ProgressBarIndeterminate();
public ComposeMail() {
initComponents();
}
private void initComponents() {
jButton4 = new javax.swing.JButton();
setDefaultCloseOperation(javax.swing.WindowConstants.DISPOSE_ON_CLOSE);
jButton4.setText("View Recipients");
jButton4.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jButton4ActionPerformed(evt);
}
});
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()
.addContainerGap()
.addComponent(jButton4, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
.addGroup(layout.createSequentialGroup()
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addGap(10, 10, 10)
))))));
layout.setVerticalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addGap(11, 11, 11)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addGap(3, 3, 3)
.addComponent(jButton4))
)));
pack();
}
private void jButton4ActionPerformed(java.awt.event.ActionEvent evt) {
pbi.setVisible(true);
new ViewRec().setVisible(true);
pbi.dispose();
}
public static void main(String[] args){
java.awt.EventQueue.invokeLater(new Runnable() {
@Override
public void run() {
new ComposeMail().setVisible(true);
}
});
}
private javax.swing.JButton jButton4;
}
编译并运行ComposeMail以重新创建我的问题。
您正在使用哪个操作系统？ – Mubin
我刚刚用Windows 7和Java 6（不得不删除'setType（）'和多个异常的catch子句），它的工作。 需要多少时间'/ * DO SOME WORK * /'？ – stuXnet
我也观察到了相同的行为 – Mubin