Java Image.getScaledInstance(int width, int height, int hints)
Syntax
Image.getScaledInstance(int width, int height, int hints) has the following syntax.
public Image getScaledInstance(int width, int height, int hints)
Example
In the following code shows how to use Image.getScaledInstance(int width, int height, int hints) method.
//w w w . j a v a2 s . com
import java.awt.BorderLayout;
import java.awt.Graphics;
import java.awt.Image;
import java.awt.Toolkit;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
public class Main extends JFrame implements ActionListener {
Image img;
JButton getPictureButton = new JButton("Get Picture");
public static void main(String[] args) {
new Main();
}
public Main() {
this.setSize(300, 300);
this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
JPanel picPanel = new PicturePanel();
this.add(picPanel, BorderLayout.CENTER);
JPanel buttonPanel = new JPanel();
getPictureButton.addActionListener(this);
buttonPanel.add(getPictureButton);
this.add(buttonPanel, BorderLayout.SOUTH);
this.setVisible(true);
}
public void actionPerformed(ActionEvent e) {
String file = "a.png";
if (file != null) {
Toolkit kit = Toolkit.getDefaultToolkit();
img = kit.getImage(file);
img = img.getScaledInstance(300, -1, Image.SCALE_SMOOTH);
this.repaint();
}
}
class PicturePanel extends JPanel {
public void paint(Graphics g) {
g.drawImage(img, 0, 0, this);
}
}
}
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