1. Stream Zoo 的基础:四个抽象类,InputStream, OutputStream, Reader, Writer
其中后面两个使用于Unicode文本。
2. 四个接口
interface Closeable {void close() throws IOException}
interface Flushable {void flush() throws IOException}
这两个比较简单
interface Readable {int read(CharBuffer cb)}
其中CharBuffer提供了支持连续/随机读写操作的方法
Appendable接口有两个方法,用于追加单个字符或一列字符
Appendable append(char c)
Appendalbe append(CharSequence s)
CharSequence是另一个接口。
java.lang.CharSequence 1.4
char charAt(int index)
int length()
CharSequence subSequence(int startIndex, int endIndex)
String toString()
3. FileInputStream和FileOutputStream
构造方法:
FileInputStream fin = new FileInputStream("employee.dat");
File f = new File("employee.dat");
FileInputStream fin = new FileInputStream(f);
注意输入Windows文件路径的时候使用双\\,如"C:\\Windows\\a.ini",不过也可以是"c:/Windows/a.ini",不过这并不被提倡。
读入一个字节:byte b = (byte) fin.read();
3. System.getProperty 方法
public static String getProperty(String key)
返回key值对应的属性
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2.21 Java notes - Streams and Files

Posted on 2007-04-22 20:24 ZelluX 阅读(333) 评论(0)  编辑  收藏 所属分类: OOP
2007-02-21 20:18:22
Key Description of Associated Value
java.version Java Runtime Environment version
java.vendor Java Runtime Environment vendor
java.vendor.url Java vendor URL
java.home Java installation directory
java.vm.specification.version Java Virtual Machine specification version
java.vm.specification.vendor Java Virtual Machine specification vendor
java.vm.specification.name Java Virtual Machine specification name
java.vm.version Java Virtual Machine implementation version
java.vm.vendor Java Virtual Machine implementation vendor
java.vm.name Java Virtual Machine implementation name
java.specification.version Java Runtime Environment specification version
java.specification.vendor Java Runtime Environment specification vendor
java.specification.name Java Runtime Environment specification name
java.class.version Java class format version number
java.class.path Java class path
java.library.path List of paths to search when loading libraries
java.io.tmpdir Default temp file path
java.compiler Name of JIT compiler to use
java.ext.dirs Path of extension directory or directories
os.name Operating system name
os.arch Operating system architecture
os.version Operating system version
file.separator File separator ("/" on UNIX)
path.separator Path separator (":" on UNIX)
line.separator Line separator ("\n" on UNIX)
user.name User's account name
user.home User's home directory
user.dir User's current working directory

如要得到当前目录,使用String dir = System.getProperty("user.dir");

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