Paint image loaded from disk - Java 2D Graphics

Java examples for 2D Graphics:Image Load

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Description

Paint image loaded from disk

Demo Code

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 java.io.File;

import javax.swing.JButton;
import javax.swing.JFileChooser;
import javax.swing.JFrame;
import javax.swing.JPanel;

public class PictureFrame extends JFrame implements ActionListener {
  Image img;/* ww  w  .  j ava2 s . co  m*/
  JButton getPictureButton;

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

  public PictureFrame() {
    this.setSize(300, 300);
    this.setTitle("Picture Frame Application");
    this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

    JPanel picPanel = new PicturePanel();
    this.add(picPanel, BorderLayout.CENTER);

    JPanel buttonPanel = new JPanel();
    getPictureButton = new JButton("Get Picture");
    getPictureButton.addActionListener(this);
    buttonPanel.add(getPictureButton);
    this.add(buttonPanel, BorderLayout.SOUTH);

    this.setVisible(true);
  }

  public void actionPerformed(ActionEvent e) {
    String file = getImageFile();
    if (file != null) {
      Toolkit kit = Toolkit.getDefaultToolkit();
      img = kit.getImage(file);
      img = img.getScaledInstance(300, -1, Image.SCALE_SMOOTH);
      this.repaint();
    }
  }

  private String getImageFile() {
    JFileChooser fc = new JFileChooser();
    fc.setFileFilter(new ImageFilter());
    int result = fc.showOpenDialog(null);
    File file = null;
    if (result == JFileChooser.APPROVE_OPTION) {
      file = fc.getSelectedFile();
      return file.getPath();
    } else
      return null;
  }
  class PicturePanel extends JPanel {
    public void paint(Graphics g) {
      g.drawImage(img, 0, 0, this);
    }
  }
}


class ImageFilter extends javax.swing.filechooser.FileFilter {
  public boolean accept(File f) {
    if (f.isDirectory())
      return true;
    String name = f.getName();
    if (name.matches(".*((.jpg)|(.gif)|(.png))"))
      return true;
    else
      return false;
  }

  public String getDescription() {
    return "Image files (*.jpg, *.gif, *.png)";
  }
}

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