File	Doc	Category	Size	Date	Package
ByteArrayOutputStream.java	API Doc	J2ME CLDC 1.1	5227	Wed Feb 05 15:55:58 GMT 2003	java.io

ByteArrayOutputStream

• java.lang.Object
  • java.io.OutputStream

Fields Summary
protected byte[]	buf The buffer where data is stored.
protected int	count The number of valid bytes in the buffer.
private boolean	isClosed Flag indicating whether the stream has been closed.

Constructors Summary
public ByteArrayOutputStream() Creates a new byte array output stream. The buffer capacity is initially 32 bytes, though its size increases if necessary. this(32);
public ByteArrayOutputStream(int size) Creates a new byte array output stream, with a buffer capacity of the specified size, in bytes. param size the initial size. exception IllegalArgumentException if size is negative. if (size < 0) { throw new IllegalArgumentException("Negative initial size: " + size); } buf = new byte[size];

Methods Summary
public synchronized void	close() Closes this output stream and releases any system resources associated with this stream. A closed stream cannot perform output operations and cannot be reopened. isClosed = true;
private void	ensureOpen() Check to make sure that the stream has not been closed if (isClosed) { throw new RuntimeException("Writing to closed ByteArrayOutputStream"); }
public synchronized void	reset() Resets the count field of this byte array output stream to zero, so that all currently accumulated output in the output stream is discarded. The output stream can be used again, reusing the already allocated buffer space. see java.io.ByteArrayInputStream#count ensureOpen(); count = 0;
public int	size() Returns the current size of the buffer. return the value of the count field, which is the number of valid bytes in this output stream. see java.io.ByteArrayOutputStream#count return count;
public synchronized byte[]	toByteArray() Creates a newly allocated byte array. Its size is the current size of this output stream and the valid contents of the buffer have been copied into it. return the current contents of this output stream, as a byte array. see java.io.ByteArrayOutputStream#size() if (isClosed && buf.length == count) { return buf; } else { byte newbuf[] = new byte[count]; System.arraycopy(buf, 0, newbuf, 0, count); return newbuf; }
public java.lang.String	toString() Converts the buffer's contents into a string, translating bytes into characters according to the platform's default character encoding. return String translated from the buffer's contents. since JDK1.1 return new String(buf, 0, count);
public synchronized void	write(int b) Writes the specified byte to this byte array output stream. param b the byte to be written. ensureOpen(); int newcount = count + 1; if (newcount > buf.length) { byte newbuf[] = new byte[Math.max(buf.length << 1, newcount)]; System.arraycopy(buf, 0, newbuf, 0, count); buf = newbuf; } buf[count] = (byte)b; count = newcount;
public synchronized void	write(byte[] b, int off, int len) Writes len bytes from the specified byte array starting at offset off to this byte array output stream. param b the data. param off the start offset in the data. param len the number of bytes to write. ensureOpen(); if ((off < 0) || (off > b.length) || (len < 0) || ((off + len) > b.length) || ((off + len) < 0)) { throw new IndexOutOfBoundsException(); } else if (len == 0) { return; } int newcount = count + len; if (newcount > buf.length) { byte newbuf[] = new byte[Math.max(buf.length << 1, newcount)]; System.arraycopy(buf, 0, newbuf, 0, count); buf = newbuf; } System.arraycopy(b, off, buf, count, len); count = newcount;