獲取資源文件

package swing;

import java.awt.EventQueue;
import java.awt.Image;
import java.awt.Toolkit;
import java.io.InputStream;
import java.net.URL;
import java.util.Scanner;

import javax.swing.JFrame;
import javax.swing.JTextArea;

public class ResourceTest {
 public static void main(String[] args) {
  EventQueue.invokeLater(new Runnable() {
   @Override
   public void run() {
    ResourceTestFrame frame = new ResourceTestFrame();
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    frame.setVisible(true);
   }
  });
 }
}

class ResourceTestFrame extends JFrame {
 public ResourceTestFrame() {
  this.setTitle("Resource Test");
  this.setSize(DEFAULT_WIDTH, DEFAULT_HEIGHT);
  
  URL aboutURL = this.getClass().getResource("ball.gif");
  Image img = Toolkit.getDefaultToolkit().getImage(aboutURL);
  this.setIconImage(img);
  
  JTextArea textArea = new JTextArea();
  InputStream in = this.getClass().getResourceAsStream("about.txt");
  Scanner scanner = new Scanner(in);
  while(scanner.hasNext()) {
   textArea.append(scanner.nextLine() + "\n");
  }
  
  this.add(textArea);
 }
 
 public static final int DEFAULT_WIDTH = 300;
 public static final int DEFAULT_HEIGHT = 300;
}