filenameemptyexception.java

1．文件和目录管理

/**
 * FileNameEmptyException extends Exception throws when a file name is empty
 * and show a message dialog 
 */

package file;
import java.io.*;
import javax.swing.*;
public class FileNameEmptyException extends IOException {
	
	public FileNameEmptyException() {
		
		super();
		JOptionPane.showMessageDialog(null,"File name is empty");
	}
}