I/O Fundamentals

Java Input and Outputnew SequenceInputStream(new FileInputStream("input2.bin"),newFileInputStream("input3.bin"))));You can also create an Enumeration of the files. First, create a reusableArrayEnumerator class:public class ArrayEnumerator implements Enumeration {private int n = 0;private Object[] objects;public ArrayEnumerator(Object[] objects) {this.objects = objects;}}public boolean hasMoreElements() {return n < objects.length;}public Object nextElement() {return objects[n++];}Then you can use it in the SequenceInputStream as follows:BufferedInputStream in = new BufferedInputStream(new SequenceInputStream(new ArrayEnumerator(new Object[] {newFileInputStream("input1.bin"),newFileInputStream("input2.bin"),newFileInputStream("input3.bin"),})));Creating Your Own FiltersIf you want to create your own filter, you can subclass one of the followingclasses:• FilterInputStream• FilterOutputStream• FilterReader• FilterWriterThese classes provide some nice default support, such as handling the close()cascading.Java Input and Output -36© 1996-2003 jGuru.com. All Rights Reserved.