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Thread: Needed help in actionPerformed statements

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    Exclamation Needed help in actionPerformed statements

    Question:


    My program:

    import java.awt.*;
    import javax.swing.*;
    import java.awt.event.*;
     
    public class GUI extends JFrame implements ActionListener
    {
    	JButton btn1;
    	JButton btn2;
    	JButton btn3;
    	JTextArea area1;
     
    	GUI()
    	{
    		setLayout (new BorderLayout());
     
    		btn1 = new JButton ("Elephant");
    		btn2 = new JButton ("Mickey");
    		btn3 = new JButton ("Butterfly");
    		area1 = new JTextArea ("");
     
    		JPanel p1 = new JPanel();
    		JPanel p2 = new JPanel();
     
     
    		p1.add (btn1);
    		p1.add (btn2);
    		p1.add (btn3);
    		p2.add (area1);
     
    		add(p2, BorderLayout. CENTER);
    		add(p1, BorderLayout. SOUTH);
    	}
     
    		public static void main (String []args)
    		{
    			String [] photos = {"elephant.jpg", "mickey.jpg", "butterly.jpg"};
     
    			GUI t = new GUI();
     
    			t.setSize(500,150);
    			t.setVisible(true);
    			t.setDefaultCloseOperation (JFrame.EXIT_ON_CLOSE);
    			t.setTitle("Button and Icons");
    		}
    		public void actionPerformed(ActionEvent evt)
    		{
    			if(evt.getSource() == btn1)
    			{
    				area1.append();
    			}
    		}
     
    }

    What shall I write in public void actionPerformed(ActionEvent evt) to display the picture from the array?


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    Default Re: Needed help in actionPerformed statements

    Was your question not answered over at the the java forums? If not, I recommend you define the question more precisely so you can get a more informative response.

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    Default Re: Needed help in actionPerformed statements

    Quote Originally Posted by copeg View Post
    Was your question not answered over at the the java forums? If not, I recommend you define the question more precisely so you can get a more informative response.
    It was answered but I dont really get it clearly. So, Im trying some other places expecting I can understand any different answers than in Java Forums.

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    Default Re: Needed help in actionPerformed statements

    Quote Originally Posted by S-NESH View Post
    It was answered but I dont really get it clearly. So, Im trying some other places expecting I can understand any different answers than in Java Forums.
    With the solution provided, what exactly don't you get? Any other solution may leave you with the same fundamental question, so addressing this directly might be beneficial.

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    Default Re: Needed help in actionPerformed statements

    Quote Originally Posted by S-NESH View Post
    It was answered but I dont really get it clearly. So, Im trying some other places expecting I can understand any different answers than in Java Forums.
    what exactly did you don't get? I provided examples of where you can put your handlers in your code.

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    Default Re: Needed help in actionPerformed statements

    Chill guys.. Im a newbie in Java.. So, Im kinda blur when I get to know something new. Need some time to understand them )=

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    Smile Re: Needed help in actionPerformed statements

    Quote Originally Posted by S-NESH View Post
    Chill guys.. Im a newbie in Java.. So, Im kinda blur when I get to know something new. Need some time to understand them )=
    I've never heard of putting an image in a JTextArea.

    I do know that you can have just an image as a JLabel.

    There's a JLabel constructor that only takes an Icon as a parameter.

    Also, JTextArea won't have any size unless you set width and height anyway.

    And append only adds text, not images.

    JLabel(Icion image)

    However, put the files in your constructor. And don't make them String objects. Make them ImageIcon objects(Icon is an interface, an extreme example of an abstract class, so it can't be initialized).

    For your actionListener, use the JLabel class setIcon(Icon image) method to change it.

    However, you should probably have another image, a default one. Just a white background. Call it WhiteBackground.jpg or something.
    Last edited by javapenguin; January 7th, 2011 at 02:00 PM.

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    Default Re: Needed help in actionPerformed statements

    JTextArea cannot accept anything except for "plain text" (no images/movies, all text is formatted exactly the same).

    If you want, you can try using a JEditorPane (or JTextPane) as both of these components support formatted text (either RTF, HTML, or your own formatting) as well as images/movies/etc. However, from looking over your project specifications the easiest way to draw a picture is to use a JLabel and set it to contain an Icon.

    See: How to Use Labels (The Java™ Tutorials > Creating a GUI With JFC/Swing > Using Swing Components) and How to Use Icons (The Java™ Tutorials > Creating a GUI With JFC/Swing > Using Swing Components)

    Your actionPerformed method doesn't need to change the JLabel, simply create an ImageIcon for the three pictures and change the icon for the JLabel using the setIcon() method.

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