CODEWITHSUNDEEP
javaimageswingjlabelembedded-resource
Pineapple
Pineapple

Reputation: 91

JLabel picture display issue

I am currently trying to simply display an image within a JFrame. I have tried using the below code but it doesn't seem to work. I can't work out where I am going wrong - any ideas?

This is the error message displayed in the console:

Exception in thread "main" java.lang.NullPointerException
    at javax.swing.ImageIcon.<init>(Unknown Source)
    at Day1.PictureTester.<init>(PictureTester.java:22)
    at Day1.PictureTester.main(PictureTester.java:14)

Here is the code:

import java.awt.GridLayout;
import javax.swing.ImageIcon;
import javax.swing.JFrame;
import javax.swing.JLabel;

public class PictureTester extends JFrame{

    private static final long serialVersionUID = 1L;

    public static void main(String[] args) {
        new PictureTester().setVisible(true);
    }

    public PictureTester(){
        super();
        setSize(600, 600);
        setLayout(new GridLayout());
        java.net.URL imgUrl = PictureTester.class.getResource("C:\\Users\\Harry\\Desktop\\LearnJava\\pug-image3.jpg");
        ImageIcon image = new ImageIcon(imgUrl);    
        JLabel display = new JLabel(image);

        add (display);
    }
}

Upvotes: 2

Views: 83

Answers (4)

A.K.
A.K.

Reputation: 2322

        Icon i=new ImageIcon("src//pics//scope.jpg");
        JLabel l1=new JLabel(i);

Use simply like this use JLabel or ImageIcon

Upvotes: 0

xhulio
xhulio

Reputation: 1103

You can do it like the following example, by using just an image and a label. also you can remove all the extra code if you intend to use this image only once.

import java.awt.GridLayout;
import javax.swing.ImageIcon;
import javax.swing.JFrame;
import javax.swing.JLabel;

public class PictureTester extends JFrame{

    private static final long serialVersionUID = 1L;

    public static void main(String[] args) {
        new PictureTester().setVisible(true);
    }

    public PictureTester(){
        super();
        setSize(600, 600);
        setLayout(new GridLayout());
        add(new JLabel(new ImageIcon("Path/To/Your/Image.png")));
    }
}

Upvotes: 1

Pineapple
Pineapple

Reputation: 91

This code solved it, it helped my thinking to create it within a new project:

package NewAppIdea;

import java.awt.BorderLayout;
import java.awt.FlowLayout;

import javax.swing.ImageIcon;
import javax.swing.JFrame;
import javax.swing.JLabel;


    public class PictureSplash extends JFrame {

        private static final long serialVersionUID = 1L;
        JLabel l1;

        PictureSplash(){
        setTitle("Pic");
        setSize(400,400);
        setLocationRelativeTo(null);
        setDefaultCloseOperation(EXIT_ON_CLOSE);
        setVisible(true);
        setLayout(new BorderLayout());
        setContentPane(new JLabel(new ImageIcon("C:\\Users\\Harry\\Desktop\\LearnJava\\pug-image3.jpg")));
        setLayout(new FlowLayout());
        setSize(399,399);
        setSize(400,400);
        }

        public static void main(String args[]) {
            new PictureSplash();
        }   
    }

Upvotes: 1

JB Nizet
JB Nizet

Reputation: 691635

Of course that won't work. Read the javadoc of Class.getResource(). It uses the ClassLoader to load a resource from the classpath, using a slash separated path.

Put your image in the same package as the PictureTester class, and just use

PictureTester.class.getResource("pug-image3.jpg");

Or put it in some random package of your source folder (like com.foo.bar), and load it using

PictureTester.class.getResource("/com/foo/bar/pug-image3.jpg");

Upvotes: 4

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