driver.java

来自「Java程序设计(美) David D. Riley著 机械工业出版社 书籍配套」· Java 代码 · 共 40 行

import java.io.*;
import javax.swing.JFileChooser;

/** Program opening a file via FileChooser  (Figure 13.29)
 *  Author: David Riley
 *  Date: January, 2005
 */
public class Driver  {

	public Driver()   {
		try {	
			JFileChooser chooser = new JFileChooser();
			int tmp = chooser.showOpenDialog( null );
			File file = chooser.getSelectedFile();
			if (file != null)   {
				FileInputStream inStream;
				InputStreamReader reader; 
				int inInt;
				inStream = new FileInputStream(file);

				reader = new InputStreamReader( inStream );
				inInt = reader.read();
				while (inInt != -1)   {
					System.out.print( (char)inInt ); 
					inInt = reader.read();
				}
				reader.close();
			} else {
				System.out.println("No file name selected.");
            }
		}
		catch (FileNotFoundException e)  {
			System.out.println("ERROR opening input stream." );
		}
		catch (IOException e)  {
			System.out.println("ERROR reading." );
		}
	}
}