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Thread: My Programme Not working .. as i used VECTOR and SWING.

  1. #1
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    Post My Programme Not working .. as i used VECTOR and SWING.

    import java.awt.Container;
    import java.awt.FlowLayout;
    import java.awt.event.ActionEvent;
    import java.awt.event.ActionListener;
    import java.awt.event.WindowAdapter;
    import java.awt.event.WindowEvent;
    import java.util.Vector;
    import java.util.Enumeration;
    import java.util.NoSuchElementException;
    import javax.swing.JButton;
    import javax.swing.JFrame;
    import javax.swing.JLabel;
    import javax.swing.JOptionPane;
    import javax.swing.JTextField;

    public class vector1 extends JFrame {
    /**
    *
    */
    private static final long serialVersionUID = 1L;
    private JLabel jlbString = new JLabel("Enter a String");
    public vector1(){
    super("Vector Class Program");
    //Made final as it can be accessed by the inner classes
    final JLabel jlbStatus = new JLabel();
    Container contentPane = getContentPane();

    final Vector<String> vector = new Vector<String>(1);
    contentPane.setLayout(new FlowLayout());
    contentPane.add(jlbString);

    final JTextField jtfInput = new JTextField();
    contentPane.add(jtfInput);
    JButton jbnAdd = new JButton("Add");

    jbnAdd.addActionListener( new ActionListener(){
    public void actionPerformed(ActionEvent e){
    vector.addElement(jtfInput.getText().trim()) ;
    jlbStatus.setText("Append to end: " + jtfInput.getText().trim());
    jtfInput.setText(" ");
    }
    });
    contentPane.add(jbnAdd);

    JButton jbnRemove = new JButton("Remove");
    jbnRemove.addActionListener(new ActionListener(){
    public void actionPerformed(ActionEvent e){
    //Returns true if element is in vector
    if(vector.removeElement(jtfInput.getText().trim()) )
    jlbStatus.setText("removed: " + jtfInput.getText().trim() + " not in vector");
    }
    });
    contentPane.add(jbnRemove);

    JButton jbnFirst = new JButton();
    jbnFirst.addActionListener(new ActionListener() {
    public void actionPerformed(ActionEvent e){
    try{
    jlbStatus.setText("First elemnt: " + vector.firstElement());
    }catch(NoSuchElementException exception){
    jlbStatus.setText(exception.toString());
    }
    }
    });
    contentPane.add(jbnFirst);

    JButton jbnLast = new JButton("Last");
    jbnLast.addActionListener(new ActionListener(){
    public void actionPerformed(ActionEvent e){
    try{
    jlbStatus.setText("Last Element" + vector.lastElement());
    }catch(NoSuchElementException exception){
    jlbStatus.setText(exception.toString());
    }

    }
    });
    contentPane.add(jbnLast);

    JButton jbnEmpty = new JButton("Empty Check");
    jbnEmpty.addActionListener(new ActionListener(){
    public void actionPerformed(ActionEvent e){
    jlbStatus.setText(vector.isEmpty() ? "Vector is Empty" : "Vector is not Empty");
    }
    });
    contentPane.add(jbnEmpty);

    JButton jbnContains = new JButton();
    jbnContains.addActionListener(new ActionListener(){
    public void actionPerformed(ActionEvent e){
    String searchKey = jtfInput.getText().trim();
    if(vector.contains(searchKey)){
    jlbStatus.setText("Vector contains" + searchKey);
    }else{
    jlbStatus.setText("vector Does not contain " + searchKey);
    }
    }
    });
    contentPane.add(jbnContains);

    JButton jbnFindElement = new JButton("Find");
    jbnFindElement.addActionListener(new ActionListener(){
    public void actionPerformed(ActionEvent e){
    jlbStatus.setText("Element found at location " + vector.indexOf(jtfInput.getText().trim()));

    }
    });
    contentPane.add(jbnFindElement);

    JButton jbnTrim = new JButton("Trim");
    jbnTrim.addActionListener(new ActionListener(){
    public void actionPerformed(ActionEvent e){
    vector.trimToSize();
    jlbStatus.setText("vector trimmmed to size");
    }
    });
    contentPane.add(jbnTrim);

    JButton jbnSize = new JButton("Size/Capacity");
    jbnSize.addActionListener(new ActionListener(){
    public void actionPerformed(ActionEvent e){
    jlbStatus.setText("Size = " + vector.size() + " ; Capacity = " + vector.capacity());
    }
    });
    contentPane.add(jbnSize);

    JButton jbnDisplay = new JButton("Dispaly");
    jbnDisplay.addActionListener(new ActionListener() {
    public void actionPerformed(ActionEvent e){
    Enumeration<String> enum1 = vector.elements();
    StringBuffer buff = new StringBuffer();

    while(enum1.hasMoreElements())
    buff.append(enum1.nextElement()).append(" ");
    JOptionPane.showMessageDialog(null, buff.toString(), "Contents of vector" , JOptionPane.PLAIN_MESSAGE);
    }
    });
    contentPane.add(jbnDisplay);
    contentPane.add(jlbStatus);
    }

    public static void main(String [] args){
    vector1 vector1 = new vector1();
    vector1.addWindowListener(new WindowAdapter(){
    public void windowClosing(WindowEvent e){
    System.exit(0);
    }
    });

    }




    }


    It gives error....

    vector1.java uses unsafe and unchecked operations.
    recompile with -Xlint:unchecked for details.

    wat does that mean... why my prgrammes is not running as it dosen;t have any errors or warnings.

    I tried to run it through eclipse. still the program gets terminated before running.

    please help me guyz....
    Last edited by sanctity4u; June 24th, 2012 at 04:51 PM.


  2. #2
    Super Moderator Norm's Avatar
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    Default Re: My Programme Not working .. as i used VECTOR and SWING.

    Did you try compiling the program with the javac option: -Xlint to find the statements that the compiler is concerned about?
    The warning message is because you are not using the generics syntax to define a class like Vector.

    If you only get warnings when you compile the program, there should be a class file created that you can execute. Check that a .class file was created.
    How are you executing the program?

    Please Edit your post and wrap your code with
    [code=java]
    <YOUR CODE HERE>
    [/code]
    to get highlighting and preserve formatting.
    If you don't understand my answer, don't ignore it, ask a question.

  3. #3
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    Default Re: My Programme Not working .. as i used VECTOR and SWING.

    [Code = java]
    import java.awt.Container;
    import java.awt.FlowLayout;
    import java.awt.event.ActionEvent;
    import java.awt.event.ActionListener;
    import java.awt.event.WindowAdapter;
    import java.awt.event.WindowEvent;
    import java.util.Vector;
    import java.util.Enumeration;
    import java.util.NoSuchElementException;
    import javax.swing.JButton;
    import javax.swing.JFrame;
    import javax.swing.JLabel;
    import javax.swing.JOptionPane;
    import javax.swing.JTextField;

    public class vector1 extends JFrame {
    /**
    *
    */
    private static final long serialVersionUID = 1L;
    private JLabel jlbString = new JLabel("Enter a String");
    public vector1(){
    super("Vector Class Program");
    //Made final as it can be accessed by the inner classes
    final JLabel jlbStatus = new JLabel();
    Container contentPane = getContentPane();

    final Vector<String> vector = new Vector<String>(1);
    contentPane.setLayout(new FlowLayout());
    contentPane.add(jlbString);

    final JTextField jtfInput = new JTextField();
    contentPane.add(jtfInput);
    JButton jbnAdd = new JButton("Add");

    jbnAdd.addActionListener( new ActionListener(){
    public void actionPerformed(ActionEvent e){
    vector.addElement(jtfInput.getText().trim()) ;
    jlbStatus.setText("Append to end: " + jtfInput.getText().trim());
    jtfInput.setText(" ");
    }
    });
    contentPane.add(jbnAdd);

    JButton jbnRemove = new JButton("Remove");
    jbnRemove.addActionListener(new ActionListener(){
    public void actionPerformed(ActionEvent e){
    //Returns true if element is in vector
    if(vector.removeElement(jtfInput.getText().trim()) )
    jlbStatus.setText("removed: " + jtfInput.getText().trim() + " not in vector");
    }
    });
    contentPane.add(jbnRemove);

    JButton jbnFirst = new JButton();
    jbnFirst.addActionListener(new ActionListener() {
    public void actionPerformed(ActionEvent e){
    try{
    jlbStatus.setText("First elemnt: " + vector.firstElement());
    }catch(NoSuchElementException exception){
    jlbStatus.setText(exception.toString());
    }
    }
    });
    contentPane.add(jbnFirst);

    JButton jbnLast = new JButton("Last");
    jbnLast.addActionListener(new ActionListener(){
    public void actionPerformed(ActionEvent e){
    try{
    jlbStatus.setText("Last Element" + vector.lastElement());
    }catch(NoSuchElementException exception){
    jlbStatus.setText(exception.toString());
    }

    }
    });
    contentPane.add(jbnLast);

    JButton jbnEmpty = new JButton("Empty Check");
    jbnEmpty.addActionListener(new ActionListener(){
    public void actionPerformed(ActionEvent e){
    jlbStatus.setText(vector.isEmpty() ? "Vector is Empty" : "Vector is not Empty");
    }
    });
    contentPane.add(jbnEmpty);

    JButton jbnContains = new JButton();
    jbnContains.addActionListener(new ActionListener(){
    public void actionPerformed(ActionEvent e){
    String searchKey = jtfInput.getText().trim();
    if(vector.contains(searchKey)){
    jlbStatus.setText("Vector contains" + searchKey);
    }else{
    jlbStatus.setText("vector Does not contain " + searchKey);
    }
    }
    });
    contentPane.add(jbnContains);

    JButton jbnFindElement = new JButton("Find");
    jbnFindElement.addActionListener(new ActionListener(){
    public void actionPerformed(ActionEvent e){
    jlbStatus.setText("Element found at location " + vector.indexOf(jtfInput.getText().trim()));

    }
    });
    contentPane.add(jbnFindElement);

    JButton jbnTrim = new JButton("Trim");
    jbnTrim.addActionListener(new ActionListener(){
    public void actionPerformed(ActionEvent e){
    vector.trimToSize();
    jlbStatus.setText("vector trimmmed to size");
    }
    });
    contentPane.add(jbnTrim);

    JButton jbnSize = new JButton("Size/Capacity");
    jbnSize.addActionListener(new ActionListener(){
    public void actionPerformed(ActionEvent e){
    jlbStatus.setText("Size = " + vector.size() + " ; Capacity = " + vector.capacity());
    }
    });
    contentPane.add(jbnSize);

    JButton jbnDisplay = new JButton("Dispaly");
    jbnDisplay.addActionListener(new ActionListener() {
    public void actionPerformed(ActionEvent e){
    Enumeration<String> enum1 = vector.elements();
    StringBuffer buff = new StringBuffer();

    while(enum1.hasMoreElements())
    buff.append(enum1.nextElement()).append(" ");
    JOptionPane.showMessageDialog(null, buff.toString(), "Contents of vector" , JOptionPane.PLAIN_MESSAGE);
    }
    });
    contentPane.add(jbnDisplay);
    contentPane.add(jlbStatus);
    }

    public static void main(String [] args){
    vector1 vector1 = new vector1();
    vector1.addWindowListener(new WindowAdapter(){
    public void windowClosing(WindowEvent e){
    System.exit(0);
    }
    });

    }




    }
    [/code]


    i tried to compile with javac ....
    i don't know how to compile using CXint option.

    yeah the class file is created ..but more than 1 class file is created. one is vector1.class and rest are vector1$1 .......to .....vector1$11.. i don;t know y..

  4. #4
    Super Moderator Norm's Avatar
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    Default Re: My Programme Not working .. as i used VECTOR and SWING.

    The classnames with the $ in them are for inner classes.
    What warnings did the compiler output when you used the -Xlint option?

    Please Edit your post and wrap your code with
    [code=java]
    <YOUR CODE HERE>
    [/code]
    to get highlighting and preserve formatting.
    If you don't understand my answer, don't ignore it, ask a question.

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