Import javax.swing problems

hey
I am new to java and have recently downloaded j2sdk1.4.2_04. I am trying to create a simple graphical application. However, It doesnt seem to import the javax.swing.* libraries. I understand that there is the src.zip in the directory, so I unzipped it but it still doesn't read the package. I read elsewhere on this forum that you should set the path to src.zip. I have tried that and it also doesnt work. My current path is:
PATH=C:\j2sdk1.4.2_04\lib\src.zip;C:\j2sdk1.4.2_04\bin
Is there an error in this, or what else should I try? All suggestions greatly appreciated.

There's no need to set your classpath when importing any of the standard packages that are provided by the JDK. Perhaps you could post a (small) code sample and the compiler error you are getting.

Similar Messages

Import javax.swing.*;

I start my programm with:
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import rechenwerk.Rechenwerk; import rechenwerk.RechenwerkFassade;
import zahl.Zahl; import zahl.ZahlFassade;
import oberflaeche.Oberflaeche;
At "import javax.swing.*" i get the failure message from the compiler:
Oktalrechner.java:8: Package javax.swing not found in import.
import javax.swing.*;
What is wrong? I don't know-please help me.
I'm using JDK1.2BETA4

Tell me when you execute java -version, what you are getting?
Looks like you are suing old JDK.
Download the latest public release JDK1.4 from http://java.sun.com
/Sreenivasa Kumar Majji.
Did somebody help you? I have a similar problem with
javax.resource... :(
I start my programm with:
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import rechenwerk.Rechenwerk; import
rechenwerk.RechenwerkFassade;
import zahl.Zahl; import zahl.ZahlFassade;
import oberflaeche.Oberflaeche;
At "import javax.swing.*" i get the failure message
from the compiler:
Oktalrechner.java:8: Package javax.swing not foundin
import.
import javax.swing.*;
What is wrong? I don't know-please help me.
I'm using JDK1.2BETA4

Import javax.swing.JOptionPane

hello
i just installed j2sdk1.3.1 into my redhat linux7.3, during installation, everything's fine...
but when i start to compile a program with some import classes...i face the problem :
cannot find type "javax/swing/JOptionPane
this is my program :
import javax.swing.JOptionPane;
public class Welcome{
public static void main(String args[])
JOptionPane.showMessageDialog(null,"Hello");
System.exit(0);
can anybody help me with this problem......?...thanks

type
java -versionto see which version of the JVM you are running
you could also try
which javato see the actuall executable that you are running.

Cannot Import javax.swing.JOptionPane Please HELP!!!

import javax.swing.JOptionPane;
this line of code returns the error:
C:\Java Files\BankAccount\BankAccount_Test.java:1: Class javax.swing.JOptionPane not found in import.
import javax.swing.JOptionPane;
^
1 error
Process completed.
Please help, I don't know what the problem could be....

Swing was not part of any JDK's earlier than 1.2. Swing (or anything with a J in front of it, ie. JFrame, JOptionPane, etc...) was probably the most dramatic (if not largest) modification/addition to the Java language, that's why versions later than, and including, 1.2 are known as "Java 2".

Importing javax.swing

Im getting error while running script..
The message :
$ javac tablePane.java
tablePane.java:3: Package javax.swing not found in import.
import javax.swing.*;
^
1 error
$
Can i have solution for this?
Pani.G

I am using metrowerks and i get the same problem with
similiar code. I have J2sdk 1.4
what do you think is wrong?I don't have worked with Metrowerks before, so are you sure that the compiler doesn't have an own
JDK embedded (like JBuilder) ?
If this is the case, I don't know if you can select in Metrowerks an other installed JDK.
With kind regards
F.-M. Jaeschke

Import javax.swing.* error

Heya. I decided to learn java and i've been doing the tutorials, recently i started the swing tutorials and the learn by example page. However, whenever I try to import javax.swing.* it gives me an error. SO you know, i am using the J2SDK 1.4.2 and netbeans IDE 5.0. Here's the error text and what i type.
import javax.swing.* ;
the error is:
illegal start of expression and then sometimes i get <identifier> expected.
can anyone help me?

To update. I figured out how to do this with a blank start file in netbeans, however it's awful to have to delete main and then make a new class file. So, is there anyway to get a blank template project or to import javax.swing.* without having to delete main and start with a blank file? SO, i guess my question has changed, but it's still about an import javax.swing.* error.
thanks.

Can't use import javax.swing.RowFilter; in javafx

Dear all,
I'm a question for you.
I developed a javafx application in which I use also swing dialog and swingx libraries.
The question is I can't use jtable filter of java jdf 1.6
That is when I try to add in my netbeans javafx project
import javax.swing.RowFilter;
it says me it's not correct library
If I create a java swing application I can add this include.
Why it?
I edited netbeans conf to set javafx sdk to javafx lib I downloaded (whole sdk), not that one with netbeans, but nothing.
It seems like I can't use this import in javafx application.
Is it posbbile?
Please help me

The reason you cannot use it is because javax.swing.RowFilter was introduced in Java 1.6 . Netbeans compiles JavaFX to work with Java 1.5, which does not have the class in question.
I have gotten around this by going to the properties->Libraries->Add JAR/Folder menu and included the jre/lib/rt.jar file from the jre directly into my project.
Someone else posted a similar solution and more detailed explanation here: http://steveonjava.com/hacking-javafx-10-to-use-java-16-features/

Importing javax.swing.plaf.basic.BasicListUI.MouseInputHandler

Hi!!
I have totally no idea why I cannot import javax.swing.plaf.basic.BasicListUI.MouseInputHandler. The compiler says BasicListUI interface is expected.

Agreed (maybe even so for 1.4.1 that I've just wiped out so I can't cehck my old rt.jar :o).
For the moment I use my old translation of the basic.properties (and windods.properties) packed in a jar-file placed in
jreXX/lib/ext/myLanguage.jar
So far it works for the dialogs in my applications ...
However, I don't find this a clean solution. I now find basic.class in rt.jar. Juged from all the other basic_xx.class files in rt.jar I guess this is where basic.properties went ... My next move will be to get hands on the source code of JAVA and check out how basic.java looks like ... perhaps this is a class filled with static fields and a simple method that sets properties in memeory or ? or ? ... In particular I need find out if some 'fields' have been added or removed compared to the old basic.properties. If so, the old translation would only be parial and my apps would be a mix of danish and english.
I'm not really that much of a JAVA programmer and this is just to share some thoughts. Does anyone out there know a central reference on how those of us that speak minority languges easily get translations of core JAVA stuff (meaning Yes, No, Cancel and the like) take effect the easy way? Are there national boards that take care of such business?
Maybe I haven't searched enough for information - my apologies if you found it waste of time reading this reply.
With kind regards and thanks in advance, MJTJ

Java Performance. Importing javax.swing.*

Hi everyone,
I have heard several times that importing entire packages into an application (class) that only requires 1-2 classes from that package is a bad idea, most notably for performance reasons (as well as code engineering quality).
I'm wondering if someone can provide a concise and insightful reasons as to why this is the case. I'm currently moving a C++ application to Java (don't ask why!) and am looking at performance aspects.
Thanks

import statements tell the compiler where to look for the classes
so it is not a performance issue when the program is executing.
Also at compile time, the difference is insignificant compared to the
rest of the compilation.
As for code maintenance, I find that if I am using something from the
java.util package, then I specifically import it, like import
java.util.Vector. However, I genenerally import java.awt.event.*; and
javax.swing.* because it is easier.
I would worry about the architecture of your code more than import
statements!!

Importing javax.ejb problems

Hi,
I have started learning EJB using netbeans 6.5 running on a mac os X 10.5.6. When i am trying to import javax.ejb and error stating that package javax.ejb does not exist.
From a search on the net i have learned that on windows os it is a problem of class paths. I don't know how to solve this problem on mac.
Thanks
Ray

Here is what I have done recently:
I tried it in Eclipse, which also isn't able to find javax.ejb and java.ejb
What is going wrong? It seems like j2ee.jar doesn't provide these libraries.
Thank you.

Javax.swing problem

Hi, I'm trying to use arrays with JTextField. First I tried
Object textField[] = new JTextField[6];
so that I could do operations like
for(int i=0;i<6;i++){
((JTextField)posTextField).setText("0.0000");
((JTextField)velTextField[i]).setText("0.0000");
((JTextField)acclTextField[i]).setText("0.0000");
Next I tried with
JTextFieldtextField[] = new JTextField[6];
All gave a java.lang.NullPointerException when I tried to run the program. Any ideas?
Thanks

This doesn't work:
JTextField textField[] = new JTextField[6];
textField[0] = new JTextField(); //compiler
expects ']' or an identifierPost more code. In [code] and [/code] tags, ur using the code button, so it's readable.
Copy and paste the exact error message and tell us which line it's complaining about.

Package javax.swing.event not found in import.

I'm receiving the above error message when compiling a Java application which begins with the following import statements:
* 1.1+Swing version.
import javax.swing.*;
import javax.swing.event.*;
import java.awt.*;
import java.awt.event.*;
import java.util.*;
My Classpath System variables are as follows:
C:\IBMCON~1\CICS\Classes\CTGCLI~1.JAR;.;C:\PROGRA~1\MQSeries\java\lib\COMIBM~2.JAR;C:\PROGRA~1\MQSeries\java\lib\COMIBM~1.JAR;C:\PROGRA~1\MQSeries\java\lib\COMIBM~3.JAR;C:\PROGRA~1\MQSeries\tools\javaclnt\samples\en_us;C:\Program Files\SQLLIB\java\db2java.zip;C:\Program Files\SQLLIB\java\runtime.zip;C:\Program Files\SQLLIB\bin;C:\Program Files\SQLLIB\java\SQLj.zip
I have Java(TM) 2 SDK, Standard Edition, Version 1.4.0 installed and am running Windows 2000.
I'd appreciate any ideas as to why this compiler error occurs. Thanks very much.

What error message?
As stated, looks like something's not where it's supposed to be.
Here's the search order of your classpath:
C:\IBMCON~1\CICS\Classes\CTGCLI~1.JAR
C:\PROGRA~1\MQSeries\java\lib\COMIBM~2.JAR
C:\PROGRA~1\MQSeries\java\lib\COMIBM~1.JAR
C:\PROGRA~1\MQSeries\java\lib\COMIBM~3.JAR
C:\PROGRA~1\MQSeries\tools\javaclnt\samples\en_us
C:\Program Files\SQLLIB\java\db2java.zip
C:\Program Files\SQLLIB\java\runtime.zip
C:\Program Files\SQLLIB\bin
C:\Program Files\SQLLIB\java\SQLj.zip

1.4.2 Java Swing problems

I have a swing application with 2 JComboBox 's, 1 JPanel (for pictures), 1 JButton and a scroll pane. Basicall the JComboBoxes have an action listener that changes the pictures when I cahnge the names. However, I would like the Jbutton when pressed to display the name chosen (from the JComboBox) and display it in the textArea. See code below.
import javax.swing.*;
import javax.swing.Action;
import java.awt.event.ActionEvent;
import java.awt.event.ItemListener;
import java.awt.*;
import java.awt.event.*;
* @author Administrator
* TODO To change the template for this generated type comment go to
* Window - Preferences - Java - Code Style - Code Templates
public class choice_in2 extends JPanel implements ActionListener{
     private JLabel contender1FieldLabel;
     private JLabel contender2FieldLabel;
     private JButton runButton;
     JLabel picture1;
     JLabel picture2;
     //Text area which shows the result
     private JTextArea textArea;
     private JLabel textAreaLabel;
     public choice_in2(){
          //          Create a ChoiceField for the input of first contender
          contender1FieldLabel = new JLabel("Contender1 ",4);
          String[] contender1Strings = { "Bill", "Bob", "Don", "Michael", "John" };
          JComboBox contender1List = new JComboBox(contender1Strings);
          contender1List.setSelectedIndex(1);
          contender1List.addActionListener(new Eavesdropper1(picture1));
          //          Create a ChoiceField for the input of second contender
          contender2FieldLabel = new JLabel("Contender2 ",4);
          String[] contender2Strings = { "Philip", "Timothy", "Tom", "Kenneth", "Stone" };
          JComboBox contender2List = new JComboBox(contender2Strings);
          contender2List.setSelectedIndex(2);
          contender2List.addActionListener(new Eavesdropper2(picture2));
        //Set up the first picture.
        picture1 = new JLabel();
        picture1.setFont(picture1.getFont().deriveFont(Font.ITALIC));
        picture1.setHorizontalAlignment(JLabel.CENTER);
        updateLabel1(contender1Strings[contender1List.getSelectedIndex()]);
        picture1.setBorder(BorderFactory.createEmptyBorder(10,0,0,0));
        //Set up the second picture.
        picture2 = new JLabel();
        picture2.setFont(picture1.getFont().deriveFont(Font.ITALIC));
        picture2.setHorizontalAlignment(JLabel.CENTER);
        updateLabel2(contender2Strings[contender2List.getSelectedIndex()]);
        picture2.setBorder(BorderFactory.createEmptyBorder(10,0,0,0));
        //The preferred size is hard-coded to be the width of the
        //widest image and the height of the tallest image + the border.
        //A real program would compute this.
        picture1.setPreferredSize(new Dimension(200, 220+10));
        picture2.setPreferredSize(new Dimension(200, 220+10));
          // Create a JButton that will compute
          runButton = new JButton("Compute");
          runButton.addActionListener(new Eavesdropper3(textArea));
          // Create a JTextArea that will display the results
          textAreaLabel = new JLabel("Results");
          textArea = new JTextArea(10,70);
          textArea.setFont(new Font("Courier",Font.PLAIN,12));
          JScrollPane scrollPane = new JScrollPane(textArea, JScrollPane.VERTICAL_SCROLLBAR_ALWAYS, JScrollPane.HORIZONTAL_SCROLLBAR_ALWAYS);
          textArea.setEditable(false);
        //Lay out the demo.
        add(contender1List, BorderLayout.WEST);
        add(picture1, BorderLayout.WEST);
        add(contender2List, BorderLayout.EAST);
        add(picture2, BorderLayout.EAST);
        add(runButton, BorderLayout.EAST);
        add(textAreaLabel, BorderLayout.SOUTH);
        add(scrollPane, BorderLayout.SOUTH);
        setBorder(BorderFactory.createEmptyBorder(20,20,20,20));
    /** Listens to the combo box. */
    public void actionPerformed(ActionEvent e) {
    public void updateLabel1(String name1) {
        ImageIcon icon1 = createImageIcon( name1 + ".jpg");
        picture1.setIcon(icon1);
        picture1.setToolTipText("A drawing of a " + name1.toLowerCase());
        if (icon1 != null) {
            picture1.setText(null);
        } else {
            picture1.setText("Image not found");
    public void updateLabel2(String name2) {
         ImageIcon icon2 = createImageIcon( name2 + ".jpg");
        picture2.setIcon(icon2);
        picture2.setToolTipText("A drawing of a " + name2.toLowerCase());
        if (icon2 != null) {
           picture2.setText(null);
        } else {
            picture2.setText("Image not found");
    /** Returns an ImageIcon, or null if the path was invalid. */
    public ImageIcon createImageIcon(String path) {
        java.net.URL imgURL = choice_in2.class.getResource(path);
        if (imgURL != null) {
            return new ImageIcon(imgURL);
        } else {
            System.err.println("Couldn't find file: " + path);
            return null;
    class Eavesdropper2 implements ActionListener {
        JLabel myTextArea;
        public Eavesdropper2(JLabel ta) {
             myTextArea = ta;
        public void actionPerformed(ActionEvent e) {
            JComboBox contender2List = (JComboBox)e.getSource();
            String contender2ListName = (String)contender2List.getSelectedItem();
            updateLabel2(contender2ListName);
            Eavesdropper3 code;
            code = new Eavesdropper3(contender2ListName);
    class Eavesdropper1 implements ActionListener {
        JLabel myTextArea;
        public Eavesdropper1(JLabel tt) {
             myTextArea = tt;
        public void actionPerformed(ActionEvent e) {
            JComboBox contender1List = (JComboBox)e.getSource();
            String contender1ListName = (String)contender1List.getSelectedItem();
            updateLabel1(contender1ListName);
    class Eavesdropper3 implements ActionListener {
         String contender22;
        JTextArea myTextArea;
        public Eavesdropper3(JTextArea bb) {
             myTextArea = bb;
        public Eavesdropper3(String contender2ListName){
             contender22 = contender2ListName;
           * @return Returns the contender22.
          public String getContender22() {
               return contender22;
        public void actionPerformed(ActionEvent e) {
             textArea.setText("Wild Test");
             textArea.append("\n      OUTCOME    \n\n " +getContender22());
}

weebib
We are using Windows XP , Nvidia graphics card, with Multiview. I hope the problem is not specific to the platform.
It is reproducible with 1.4.2 and absent in 1.4.1
camickr
I am new to this forum. didn't know about code blocks.

Urgent help need on swing problem

Dear friends,
I met a problem and need urgent help from guru here, I am Swing newbie,
I have following code and hope to draw lines between any two components at RUN-TIME, not at design time
Please throw some skeleton code, Thanks so much!!
code:
package com.swing.test;
import java.awt.*;
import java.awt.event.*;
import java.awt.geom.*;
import javax.swing.*;
import javax.swing.event.*;
public class LongguConnectLineCommponent
    public static void main(String[] args)
        JFrame f = new JFrame("Connecting Lines");
        f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        f.getContentPane().add(new ConnectionPanel());
        f.setSize(400,300);
        f.setLocation(200,200);
        f.setVisible(true);
class ConnectionPanel extends JPanel
    JLabel label1, label2, label3, label4;
    JLabel[] labels;
    JLabel selectedLabel;
    int cx, cy;
    public ConnectionPanel()
        setLayout(null);
        addLabels();
        label1.setBounds( 25, 50, 125, 25);
        label2.setBounds(225, 50, 125, 25);
        label3.setBounds( 25, 175, 125, 25);
        label4.setBounds(225, 175, 125, 25);
        determineCenterOfComponents();
        ComponentMover mover = new ComponentMover();
        addMouseListener(mover);
        addMouseMotionListener(mover);
    public void paintComponent(Graphics g)
        super.paintComponent(g);
        Graphics2D g2 = (Graphics2D)g;
        g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
                            RenderingHints.VALUE_ANTIALIAS_ON);
        Point[] p;
        for(int i = 0; i < labels.length; i++)
            for(int j = i + 1; j < labels.length; j++)
                p = getEndPoints(labels, labels[j]);
//g2.draw(new Line2D.Double(p[0], p[1]));
private Point[] getEndPoints(Component c1, Component c2)
Point
p1 = new Point(),
p2 = new Point();
Rectangle
r1 = c1.getBounds(),
r2 = c2.getBounds();
int direction = r1.outcode(r2.x, r2.y);
switch(direction) // r2 located < direction > of r1
case (Rectangle.OUT_LEFT): // West
p1.x = r1.x;
p1.y = r1.y;
p2.x = r2.x + r2.width;
p2.y = r2.y;
if(r1.y > cy)
p1.y = r1.y + r1.height;
p2.y = r2.y + r2.height;
break;
case (Rectangle.OUT_TOP): // North
p1.x = r1.x;
p1.y = r1.y;
p2.x = r2.x;
p2.y = r2.y + r2.height;
if(r1.x > cx && r2.x > cx)
p1.x = r1.x + r1.width;
p2.x = r2.x + r2.width;
break;
case (Rectangle.OUT_LEFT + Rectangle.OUT_TOP): // NW
p1.x = r1.x;
p1.y = r1.y;
p2.x = r2.x + r2.width;
p2.y = r2.y;
if(r1.y > r2.y + r2.height)
p2.y = r2.y + r2.height;
break;
case (Rectangle.OUT_RIGHT): // East
p1.x = r1.x + r1.width;
p1.y = r1.y;
p2.x = r2.x;
p2.y = r2.y;
if(r1.y > cy)
p1.y = r1.y + r1.height;
p2.y = r2.y + r2.height;
break;
case (Rectangle.OUT_TOP + Rectangle.OUT_RIGHT): // NE
p1.x = r1.x + r1.width;
p1.y = r1.y;
p2.x = r2.x;
p2.y = r2.y;
if(r1.y > cy)
p1.y = r1.y + r1.height;
p2.y = r2.y + r2.height;
if(r1.y > r2.y + r2.height)
p1.y = r1.y;
else
if(r1.y > r2.y + r2.height)
p2.y = r2.y + r2.height;
break;
case (Rectangle.OUT_BOTTOM): // South
p1.x = r1.x;
p1.y = r1.y + r1.height;
p2.x = r2.x;
p2.y = r2.y;
if(r1.x > cx && r2.x > cx)
p1.x = r1.x + r1.width;
p2.x = r2.x + r2.width;
break;
case (Rectangle.OUT_RIGHT + Rectangle.OUT_BOTTOM): // SE
p1.x = r1.x + r1.width;
p1.y = r1.y + r1.height;
p2.x = r2.x;
p2.y = r2.y;
break;
case (Rectangle.OUT_BOTTOM + Rectangle.OUT_LEFT): // SW
p1.x = r1.x;
p1.y = r1.y + r1.height;
p2.x = r2.x;
p2.y = r2.y;
if(r1.x > r2.x + r2.width)
p2.x = r2.x + r2.width;
if(r1.x > cx && r2.x > cx)
p1.x = r1.x + r1.width;
p2.x = r2.x + r2.width;
return new Point[] {p1, p2};
private void determineCenterOfComponents()
int
xMin = Integer.MAX_VALUE,
yMin = Integer.MAX_VALUE,
xMax = 0,
yMax = 0;
for(int i = 0; i < labels.length; i++)
Rectangle r = labels[i].getBounds();
if(r.x < xMin)
xMin = r.x;
if(r.y < yMin)
yMin = r.y;
if(r.x + r.width > xMax)
xMax = r.x + r.width;
if(r.y + r.height > yMax)
yMax = r.y + r.height;
cx = xMin + (xMax - xMin)/2;
cy = yMin + (yMax - yMin)/2;
private class ComponentMover extends MouseInputAdapter
Point offsetP = new Point();
boolean dragging;
public void mousePressed(MouseEvent e)
Point p = e.getPoint();
for(int i = 0; i < labels.length; i++)
Rectangle r = labels[i].getBounds();
if(r.contains(p))
selectedLabel = labels[i];
offsetP.x = p.x - r.x;
offsetP.y = p.y - r.y;
dragging = true;
break;
public void mouseReleased(MouseEvent e)
dragging = false;
public void mouseDragged(MouseEvent e)
if(dragging)
Rectangle r = selectedLabel.getBounds();
r.x = e.getX() - offsetP.x;
r.y = e.getY() - offsetP.y;
selectedLabel.setBounds(r.x, r.y, r.width, r.height);
determineCenterOfComponents();
repaint();
private void addLabels()
label1 = new JLabel("Label 1");
label2 = new JLabel("Label 2");
label3 = new JLabel("Label 3");
label4 = new JLabel("Label 4");
labels = new JLabel[] {
label1, label2, label3, label4
for(int i = 0; i < labels.length; i++)
labels[i].setHorizontalAlignment(SwingConstants.CENTER);
labels[i].setBorder(BorderFactory.createEtchedBorder());
add(labels[i]);

If you need some help, be respectful of the forum rules and people will help. By using "urgent" in the title and bumping your message every 2 hours you're just asking to be ignored (which is what you ended up with).

Getting started with import javax

I'm working my way through tutorials re java 1.2, on linux.
I have had no problem (so far) with code using import java.text.*; import java.util.*; etc But at import javax.swing.*; trying to work with JFrame, I get error - Package javax.swing not found in import.
I'm a bit lost as none of the text seems to anticipate such a problem. Can anyone help.
Thanks Richard

it sounds like you are using an older version of java that does not yet support swing swing is new to to java since the java 2 platform. maybe you don't have that version on your computer of you are compiling with an older version try checking your verseion ( sorry i keep forgetting the numbers in wich the released swing)..

Import javax.swing problems

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