How to set the default icon in a JFrame?

Question

So I was making Java, and made a nice little program. Here's the code:

import java.awt.BorderLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JTextField;

public class aa extends JFrame{
    private JButton jb;
    private JTextField jt0;
    private JTextField jt1;
    private JTextField jt2;
    int jti1;
    int jti2;

    public aa(){
        jb = new JButton(">> FIGHT <<");
        jt0 = new JTextField("", 25);
        jt1 = new JTextField("", 25);
        jt2 = new JTextField("<< BATTLE VICTOR >>", 35);    
        jt0.setText("");
        jt2.setEditable(false);

        jb.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                if(jt0.getText().length() > jt1.getText().length())
                    jt2.setText((jt0.getText() + " << IS VICTORIUS OVER >> " + jt1.getText()));
                else if(jt1.getText().length() > jt0.getText().length())
                    jt2.setText((jt1.getText() + " << IS VICTORIUS OVER >> " + jt0.getText()));
                else if(jt1.getText().length() == jt0.getText().length())
                    jt2.setText((jt1.getText() + " << TIED >> " + jt0.getText()));
            };
        }
        );

        add(jt0, BorderLayout.NORTH);
        add(jt1, BorderLayout.NORTH);
        add(jt2, BorderLayout.NORTH);
        add(jb, BorderLayout.CENTER);
    }
}

And here is the running script:

import java.awt.FlowLayout;
import java.awt.Image;
import javax.swing.ImageIcon;
import javax.swing.JFrame;

public class a{
    public static void main(String[] args){
        aa b = new aa();

        b.setLayout(new FlowLayout());
        b.setTitle("BattleWords");
        b.setSize(420, 150);
        b.setVisible(true);
        b.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    }
}

}

I have so far tried the whole setIconImage() crap and it did not work. I want to add in a png or gif or ico image. Where should I place it? Where does the code go and how can it look like?

That "setIconImage crap" is what you need to do. Perhaps you were doing it wrong? Show us some sample code with the non-working code. Also, where was the image file in your folder hierarchy? — TheZ, Oct 22 '12 at 22:16
import javax.swing.JFrame; import javax.swing.JTextField; public class b extends JFrame{ private JTextField jt; public b(){ jt = new JTextField(); jt.setText("Hello World!"); //'Set icon crap' } } — , Oct 22 '12 at 22:53

score 3 · Accepted Answer · edited Oct 22 '12 at 23:58

3

You do in fact use JFrame.setIconImage(). Here is an example of code which could appear in the constructor of your JFrame or even better in an initComponents method:

try {
    Image image = ImageIO.read(aa.class.getResource("/TestImage.png"));
    setIconImage(image);
} (IOException e) {
   // handle exception
}

The image TestImage.png would be located in the root folder where your class files are located. This

edited Oct 22 '12 at 23:58

MadProgrammer

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answered Oct 22 '12 at 22:24

Reimeus

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It says "Unhandled exception type IOException" – Oct 22 '12 at 22:35
That error doesnt tell much. Did you copy the image into the class root folder? – Reimeus Oct 22 '12 at 22:47
I added it to src. all of the .java's are in there. – Oct 22 '12 at 22:51
No, it (the image) would be in the `bin` folder – Reimeus Oct 22 '12 at 22:53
Don't know that you can. It scales everything down to fit. – Reimeus Oct 22 '12 at 22:57

score 0 · Answer 2 · answered Aug 27 '13 at 16:09

Try making a folder outside your sources then put the icon image in there. Then, use this code to load your icon.

b.setIconImage(ImageIO.read(new File("res/icon.png")));

I use this and it works every time.

How to set the default icon in a JFrame?

2 Answers2