FileCopy.java

import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;

public class FileCopy {
                                                  // geprüfte exceptions
    public static void main(String[] args) throws FileNotFoundException, IOException {
        FileInputStream fis = null;
        FileOutputStream fos = null;
      
        // Exception-Handler für ungeprüfte exceptions
        try {
          
          fis = new FileInputStream(args[0]);
          fos = new FileOutputStream(args[1]);   
          
        } catch (ArrayIndexOutOfBoundsException e) {
          
          System.out.println("Die Parameterliste beim Programmaufruf sollte sein:");
          System.out.println("java FileCopy quelldatei zieldatei");
          
          return;
        } catch (Exception e) {
          
          if ( !"0".equals(e.getMessage()) ) {
          
            System.out.println(e.getMessage() + "\n\nStack-trace:"); 
            for (StackTraceElement element : e.getStackTrace() ) {
              System.out.println(element);
            }
          
          } else {
            System.out.println("Ein unerwarteter Fehler trat auf!");            
          }
          
          return;
        }
      
        int c;

        c = fis.read();

        while ( c != -1 ) {
          fos.write(c);
          c = fis.read();
        }

        fis.close();
        fos.close();
    }
}