JDK 11 java.base.jmod - Base Module
JDK 11 java.base.jmod is the JMOD file for JDK 11 Base module.
JDK 11 Base module compiled class files are stored in \fyicenter\jdk-11.0.1\jmods\java.base.jmod.
JDK 11 Base module compiled class files are also linked and stored in the \fyicenter\jdk-11.0.1\lib\modules JImage file.
JDK 11 Base module source code files are stored in \fyicenter\jdk-11.0.1\lib\src.zip\java.base.
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⏎ java/io/ByteArrayOutputStream.java
/*
* Copyright (c) 1994, 2018, Oracle and/or its affiliates. All rights reserved.
* ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
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package java.io;
import java.nio.charset.Charset;
import java.util.Arrays;
import java.util.Objects;
/**
* This class implements an output stream in which the data is
* written into a byte array. The buffer automatically grows as data
* is written to it.
* The data can be retrieved using {@code toByteArray()} and
* {@code toString()}.
* <p>
* Closing a {@code ByteArrayOutputStream} has no effect. The methods in
* this class can be called after the stream has been closed without
* generating an {@code IOException}.
*
* @author Arthur van Hoff
* @since 1.0
*/
public class ByteArrayOutputStream extends OutputStream {
/**
* The buffer where data is stored.
*/
protected byte buf[];
/**
* The number of valid bytes in the buffer.
*/
protected int count;
/**
* Creates a new {@code ByteArrayOutputStream}. The buffer capacity is
* initially 32 bytes, though its size increases if necessary.
*/
public ByteArrayOutputStream() {
this(32);
}
/**
* Creates a new {@code ByteArrayOutputStream}, with a buffer capacity of
* the specified size, in bytes.
*
* @param size the initial size.
* @throws IllegalArgumentException if size is negative.
*/
public ByteArrayOutputStream(int size) {
if (size < 0) {
throw new IllegalArgumentException("Negative initial size: "
+ size);
}
buf = new byte[size];
}
/**
* Increases the capacity if necessary to ensure that it can hold
* at least the number of elements specified by the minimum
* capacity argument.
*
* @param minCapacity the desired minimum capacity
* @throws OutOfMemoryError if {@code minCapacity < 0}. This is
* interpreted as a request for the unsatisfiably large capacity
* {@code (long) Integer.MAX_VALUE + (minCapacity - Integer.MAX_VALUE)}.
*/
private void ensureCapacity(int minCapacity) {
// overflow-conscious code
if (minCapacity - buf.length > 0)
grow(minCapacity);
}
/**
* The maximum size of array to allocate.
* Some VMs reserve some header words in an array.
* Attempts to allocate larger arrays may result in
* OutOfMemoryError: Requested array size exceeds VM limit
*/
private static final int MAX_ARRAY_SIZE = Integer.MAX_VALUE - 8;
/**
* Increases the capacity to ensure that it can hold at least the
* number of elements specified by the minimum capacity argument.
*
* @param minCapacity the desired minimum capacity
*/
private void grow(int minCapacity) {
// overflow-conscious code
int oldCapacity = buf.length;
int newCapacity = oldCapacity << 1;
if (newCapacity - minCapacity < 0)
newCapacity = minCapacity;
if (newCapacity - MAX_ARRAY_SIZE > 0)
newCapacity = hugeCapacity(minCapacity);
buf = Arrays.copyOf(buf, newCapacity);
}
private static int hugeCapacity(int minCapacity) {
if (minCapacity < 0) // overflow
throw new OutOfMemoryError();
return (minCapacity > MAX_ARRAY_SIZE) ?
Integer.MAX_VALUE :
MAX_ARRAY_SIZE;
}
/**
* Writes the specified byte to this {@code ByteArrayOutputStream}.
*
* @param b the byte to be written.
*/
public synchronized void write(int b) {
ensureCapacity(count + 1);
buf[count] = (byte) b;
count += 1;
}
/**
* Writes {@code len} bytes from the specified byte array
* starting at offset {@code off} to this {@code ByteArrayOutputStream}.
*
* @param b the data.
* @param off the start offset in the data.
* @param len the number of bytes to write.
* @throws NullPointerException if {@code b} is {@code null}.
* @throws IndexOutOfBoundsException if {@code off} is negative,
* {@code len} is negative, or {@code len} is greater than
* {@code b.length - off}
*/
public synchronized void write(byte b[], int off, int len) {
Objects.checkFromIndexSize(off, len, b.length);
ensureCapacity(count + len);
System.arraycopy(b, off, buf, count, len);
count += len;
}
/**
* Writes the complete contents of the specified byte array
* to this {@code ByteArrayOutputStream}.
*
* @apiNote
* This method is equivalent to {@link #write(byte[],int,int)
* write(b, 0, b.length)}.
*
* @param b the data.
* @throws NullPointerException if {@code b} is {@code null}.
* @since 11
*/
public void writeBytes(byte b[]) {
write(b, 0, b.length);
}
/**
* Writes the complete contents of this {@code ByteArrayOutputStream} to
* the specified output stream argument, as if by calling the output
* stream's write method using {@code out.write(buf, 0, count)}.
*
* @param out the output stream to which to write the data.
* @throws NullPointerException if {@code out} is {@code null}.
* @throws IOException if an I/O error occurs.
*/
public synchronized void writeTo(OutputStream out) throws IOException {
out.write(buf, 0, count);
}
/**
* Resets the {@code count} field of this {@code ByteArrayOutputStream}
* 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
*/
public synchronized void reset() {
count = 0;
}
/**
* 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()
*/
public synchronized byte[] toByteArray() {
return Arrays.copyOf(buf, count);
}
/**
* Returns the current size of the buffer.
*
* @return the value of the {@code count} field, which is the number
* of valid bytes in this output stream.
* @see java.io.ByteArrayOutputStream#count
*/
public synchronized int size() {
return count;
}
/**
* Converts the buffer's contents into a string decoding bytes using the
* platform's default character set. The length of the new {@code String}
* is a function of the character set, and hence may not be equal to the
* size of the buffer.
*
* <p> This method always replaces malformed-input and unmappable-character
* sequences with the default replacement string for the platform's
* default character set. The {@linkplain java.nio.charset.CharsetDecoder}
* class should be used when more control over the decoding process is
* required.
*
* @return String decoded from the buffer's contents.
* @since 1.1
*/
public synchronized String toString() {
return new String(buf, 0, count);
}
/**
* Converts the buffer's contents into a string by decoding the bytes using
* the named {@link java.nio.charset.Charset charset}.
*
* <p> This method is equivalent to {@code #toString(charset)} that takes a
* {@link java.nio.charset.Charset charset}.
*
* <p> An invocation of this method of the form
*
* <pre> {@code
* ByteArrayOutputStream b = ...
* b.toString("UTF-8")
* }
* </pre>
*
* behaves in exactly the same way as the expression
*
* <pre> {@code
* ByteArrayOutputStream b = ...
* b.toString(StandardCharsets.UTF_8)
* }
* </pre>
*
*
* @param charsetName the name of a supported
* {@link java.nio.charset.Charset charset}
* @return String decoded from the buffer's contents.
* @throws UnsupportedEncodingException
* If the named charset is not supported
* @since 1.1
*/
public synchronized String toString(String charsetName)
throws UnsupportedEncodingException
{
return new String(buf, 0, count, charsetName);
}
/**
* Converts the buffer's contents into a string by decoding the bytes using
* the specified {@link java.nio.charset.Charset charset}. The length of the new
* {@code String} is a function of the charset, and hence may not be equal
* to the length of the byte array.
*
* <p> This method always replaces malformed-input and unmappable-character
* sequences with the charset's default replacement string. The {@link
* java.nio.charset.CharsetDecoder} class should be used when more control
* over the decoding process is required.
*
* @param charset the {@linkplain java.nio.charset.Charset charset}
* to be used to decode the {@code bytes}
* @return String decoded from the buffer's contents.
* @since 10
*/
public synchronized String toString(Charset charset) {
return new String(buf, 0, count, charset);
}
/**
* Creates a newly allocated string. Its size is the current size of
* the output stream and the valid contents of the buffer have been
* copied into it. Each character <i>c</i> in the resulting string is
* constructed from the corresponding element <i>b</i> in the byte
* array such that:
* <blockquote><pre>{@code
* c == (char)(((hibyte & 0xff) << 8) | (b & 0xff))
* }</pre></blockquote>
*
* @deprecated This method does not properly convert bytes into characters.
* As of JDK 1.1, the preferred way to do this is via the
* {@link #toString(String charsetName)} or {@link #toString(Charset charset)}
* method, which takes an encoding-name or charset argument,
* or the {@code toString()} method, which uses the platform's default
* character encoding.
*
* @param hibyte the high byte of each resulting Unicode character.
* @return the current contents of the output stream, as a string.
* @see java.io.ByteArrayOutputStream#size()
* @see java.io.ByteArrayOutputStream#toString(String)
* @see java.io.ByteArrayOutputStream#toString()
*/
@Deprecated
public synchronized String toString(int hibyte) {
return new String(buf, hibyte, 0, count);
}
/**
* Closing a {@code ByteArrayOutputStream} has no effect. The methods in
* this class can be called after the stream has been closed without
* generating an {@code IOException}.
*/
public void close() throws IOException {
}
}
⏎ java/io/ByteArrayOutputStream.java
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