PROGRAMMING

m9/ JAVA
REMEMBERS




Last update:   26-07-2021

Image

Put images/ on project root, on the same level with build/ and src/.
 
import java.awt.*;
import java.awt.image.BufferedImage;
import java.io.File;
import javax.imageio.ImageIO;
import javax.swing.*;

public class App extends JFrame {

    public static void main(String[] args) {

        App frame = new App();
        frame.setBounds(200, 200, 300, 300);
        frame.setDefaultCloseOperation(EXIT_ON_CLOSE);
        frame.setLayout(new FlowLayout()); // not BorderLayout !
        frame.setVisible(true);
    }
    
    public App() { // Look Here
        
        try {
            String imageFile = "images/elephant.png";
            BufferedImage image = ImageIO.read(new File(imageFile));
            JLabel imageLabel = new JLabel(new ImageIcon(image));
            add(imageLabel);
        } catch (Exception e) {}
    }
}
... 16 lines
 

Image Button

Use setIcon() to add an image to a button. Also you can change the cursor using setCursor().
 
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.*;

public class App extends JFrame {

    public static void main(String[] args) {
        App frame = new App();
        frame.setBounds(200, 200, 300, 300);
        frame.setDefaultCloseOperation(EXIT_ON_CLOSE);
        frame.setLayout(new FlowLayout());
        frame.setVisible(true);
    }
    
    public App() { 
        
        add(new JButton() {{ // Look Here
            
            setIcon(new ImageIcon("images/elephant.png"));
            setBorderPainted(false);
            setContentAreaFilled(false);
            setFocusPainted(false);
            
            setCursor(new Cursor(Cursor.HAND_CURSOR));
            
            addActionListener(new ActionListener() {
                @Override public void actionPerformed(ActionEvent e) {
                    System.out.println("button clicked");
                }
            });
        }});
    }
}
... 21 lines
 

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