问题
This is my code below that have to be generated in GUI form(Using Swing awt) My code work is to read text files from a folder and get repeated words count and saving those selected files to a user specified folder.
if(tmp.isSelected()) {
String filepathNName = tf.getText() +"\\"+ tmp.getText();
//filepathNName = System.getProperty("path.separator");
String filename = tmp.getText();
System.out.println("filename = " + filename);
System.out.println("filepaname = " + filepathNName);
System.out.println("outputDir = " + outputDir);
boolean success = latestex1.exlCreator(filepathNName, outputDir, filename);
if(success) {
JOptionPane.showMessageDialog(null, "Successfully Completed. Pls refer to the path " + outputDir + " for output files");
} else {
JOptionPane.showMessageDialog(null, "OOPS. Some Error!!!");
}
In this code snippet The variable "success " does the file saving action by calling the properties from another program.
After saving saving several files say(100) My message dialog box should show the prompt only once. But for each and every save file action it prompts again and again.
If I save 100 Files the message box appears 100 times.*(IF and else).
I need to make appear it only once after all saving the files.!
Any suggestions welcomed! Thanks in advance.
full code below:
package latestprojectswing;
import java.awt.Dimension;
import java.awt.Font;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.File;
import java.util.ArrayList;
import java.util.Iterator;
import javax.swing.JButton;
import javax.swing.JCheckBox;
import javax.swing.JFileChooser;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JScrollBar;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.JTextField;
import javax.swing.ScrollPaneConstants;
public class latestswingpgm3 extends Thread implements ActionListener
{
JFrame frame;
JPanel panel;
JTextField tf,text,tf1;
JTextArea ta,text1;
JLabel lab1;
String str;
JScrollBar scrol;
JScrollPane scrollPane;
File fl;
private JCheckBox chckbxSelectAll;
private JCheckBox chckbxf1;
private JTextField textField;
private JLabel lblSourceFolderfiles;
private JButton btnChoosedirectoryfrom;
private JButton btnDisplay;
private JLabel lblListFilesBelow;
private JScrollPane jScrollPane1;
ArrayList<JCheckBox> aL = new ArrayList<JCheckBox>();
int selectedCounter = 0;
int y=100;
JPanel contentPane;
String outputDir;
latestswingpgm3()
{
frame = new JFrame( "Search box" );
frame.getContentPane().setLayout( null );
frame.setSize( 820, 700 );
panel = new JPanel();
panel.setBounds( 25, 90, 750, 400 );
//panel.setLayout(null);
//panel.setBounds( 25, 90, 750, 400 );
scrollPane = new JScrollPane( panel );
scrollPane.setHorizontalScrollBarPolicy(JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED);
scrollPane.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_ALWAYS);
//scrollPane.setBounds( 25, 90, 750, 300 );
scrollPane.setPreferredSize(new Dimension(500, 300));
//panel.setVisible(true);
scrollPane.setVisible(true);
frame.add(panel);
frame.add(scrollPane);
tf = new JTextField();
tf.setBounds( 25, 50, 750, 40 );
tf.setFont( new Font( "Latha", Font.BOLD, 20 ) );
tf.setHorizontalAlignment( JTextField.CENTER );
frame.getContentPane().add( tf );
chckbxSelectAll = new JCheckBox("Select All");
chckbxSelectAll.setBounds(25, 557, 97, 23);
frame.getContentPane().add(chckbxSelectAll);
chckbxSelectAll.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
Iterator<JCheckBox> i = aL.iterator();
while(i.hasNext()) {
JCheckBox tmp = i.next();
if(chckbxSelectAll.isSelected()) {
tmp.doClick();
} else {
tmp.setSelected(false);
selectedCounter -= 1;
if(selectedCounter < 0) {
selectedCounter = 0;
}
textField.setText(Integer.toString(selectedCounter));
}
}
}
});
JButton btnGenerate = new JButton("Generate");
btnGenerate.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
Iterator<JCheckBox> i = aL.iterator();
while(i.hasNext()) {
JCheckBox tmp = i.next();
//scroll adder
jScrollPane1 = new JScrollPane(frame);
jScrollPane1.add(tmp);
jScrollPane1.revalidate();
if(tmp.isSelected()) {
String filepathNName = tf.getText() +"\\"+ tmp.getText();
//filepathNName = System.getProperty("path.separator");
String filename = tmp.getText();
System.out.println("filename = " + filename);
System.out.println("filepaname = " + filepathNName);
System.out.println("outputDir = " + outputDir);
boolean success = latestex1.exlCreator(filepathNName, outputDir, filename);
if(success) {
JOptionPane.showMessageDialog(null, "Successfully Completed. Pls refer to the path " + outputDir + " for output files");
} else {
JOptionPane.showMessageDialog(null, "OOPS. Some Error!!!");
}
}
}
}
});
btnGenerate.setBounds(316, 604, 89, 23);
frame.getContentPane().add(btnGenerate);
textField = new JTextField();
textField.setBounds(268, 558, 86, 20);
frame.getContentPane().add(textField);
textField.setColumns(10);
JLabel lblNoOfFiles = new JLabel("NO of Files Selected");
lblNoOfFiles.setBounds(141, 561, 139, 14);
frame.getContentPane().add(lblNoOfFiles);
JLabel lblDestinationFolderTo = new JLabel("Destination PathTo Generate Files");
lblDestinationFolderTo.setBounds(553, 561, 226, 14);
frame.getContentPane().add(lblDestinationFolderTo);
JButton btnBrowse = new JButton("Browse");
btnBrowse.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent arg0) {
JFileChooser chooser = new JFileChooser();
chooser.setFileSelectionMode(JFileChooser.FILES_AND_DIRECTORIES);
int returnVal = chooser.showOpenDialog(frame);
if(returnVal == JFileChooser.APPROVE_OPTION) {
str = chooser.getSelectedFile().getAbsolutePath();
}
if ( str != null && !str.trim().equals( "" ) )
{
tf1.setText( str );
outputDir = str;
// Enable the search button
//btnDisplay.setEnabled( true );
}
else
{
//btnDisplay.setEnabled( false );
}
}
});
btnBrowse.setBounds(553, 583, 89, 23);
frame.getContentPane().add(btnBrowse);
tf1 = new JTextField();
tf1.setBounds( 553, 620, 400, 30 );
tf1.setFont( new Font( "Latha", Font.BOLD, 20 ) );
frame.getContentPane().add( tf1 );
lblSourceFolderfiles = new JLabel("Source Folder/ Files");
lblSourceFolderfiles.setBounds(6, 17, 138, 14);
frame.getContentPane().add(lblSourceFolderfiles);
btnChoosedirectoryfrom = new JButton("ChooseDirectory From");
btnChoosedirectoryfrom.addActionListener(this);
btnChoosedirectoryfrom.setBounds(141, 9, 170, 30);
frame.getContentPane().add(btnChoosedirectoryfrom);
btnDisplay = new JButton("Select To Display");
btnDisplay.setEnabled(false);
btnDisplay.setBounds(534, 9, 180, 30);
btnDisplay.addActionListener( this );
frame.getContentPane().add(btnDisplay);
lblListFilesBelow = new JLabel("List files Below to choose ");
lblListFilesBelow.setBounds(344, 17, 180, 14);
frame.getContentPane().add(lblListFilesBelow);
frame.setVisible( true );
frame.setDefaultCloseOperation( JFrame.EXIT_ON_CLOSE );
}
public void actionPerformed( ActionEvent ae )
{
if ( ae.getActionCommand().equals( "ChooseDirectory From" ) )
{
JFileChooser chooser = new JFileChooser();
chooser.setFileSelectionMode(JFileChooser.FILES_AND_DIRECTORIES);
int returnVal = chooser.showOpenDialog(frame);
if(returnVal == JFileChooser.APPROVE_OPTION) {
str = chooser.getSelectedFile().getAbsolutePath();
}
if ( str != null && !str.trim().equals( "" ) )
{
tf.setText( str );
// Enable the search button
btnDisplay.setEnabled( true );
}
else
{
btnDisplay.setEnabled( false );
}
}
if ( ae.getActionCommand().equals( "Select To Display" ) )
{
if(aL!=null) {
Iterator<JCheckBox> i = aL.iterator();
while(i.hasNext()) {
panel.remove(i.next());
}
selectedCounter = 0;
textField.setText(Integer.toString(selectedCounter));
}
fl = new File( str );
File[] flist = fl.listFiles();
for ( int i = 0; i < flist.length; i++ )
{
if ( flist[i].isFile() )
{
final JCheckBox cb1 = new JCheckBox(flist[i].getName());
scrollPane.add(cb1);
panel.add(cb1);
cb1.setBounds(25, y, 200, 25);
cb1.setFont(new Font( "Latha", Font.BOLD, 20 ));
cb1.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e){
if(cb1.isSelected()) {
selectedCounter += 1;
} else {
selectedCounter -= 1;
if(selectedCounter < 0) {
selectedCounter = 0;
}
}
textField.setText(Integer.toString(selectedCounter));
}
});
aL.add(cb1);
panel.add(cb1);
y+=30;
}
}
}
}
public static void main( String args[] )
{
new latestswingpgm3();
}
}
回答1:
Change this
if(success) { JOptionPane.showMessageDialog(null, "Successfully Completed. Pls refer to the path " + outputDir + " for output files"); }else { JOptionPane.showMessageDialog(null, "OOPS. Some Error!!!"); }
To
if(success&&!once) { JOptionPane.showMessageDialog(null, "Successfully Completed. Pls refer to the path " + outputDir + " for output files");once=true; }else if(once! =true) { JOptionPane.showMessageDialog(null, "OOPS. Some Error!!!"); }
Declare once as boolean once=false outside if..
Edit
Since you posted the full source code.. Now it's clear.. You have to declare once variable outside the while loop..
来源：https://stackoverflow.com/questions/35424596/how-to-restrict-joptionpane-message-dialog-box-prompting-once-for-the-condition