java中io流图解

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io流

• 字节流
  • InputStream
    • FileInputStream
      • 概要
        • 构造器
          • public FileInputStream(String name){}
          • public FileInputStream(File file){}
    • FilterInputStream
      • BufferedInputStream
        • 概要
          • 构造器
            • public BufferedInputStream(InputStream in){}
            • public BufferedInputStream(InputStream in, int size){}
          • 成员变量
            • protected volatile byte buf[];
      • DataInputStream
        • 概要
          • 构造器
            • public DataInputStream(InputStream in){}
          • 方法
            • readInt()、readShort().....
    • ByteArrayInputStream
      • 概要
        • 构造器
          • public ByteArrayInputStream(byte buf[]){}
          • public ByteArrayInputStream(byte buf[], int offset, int length){}
        • 成员变量
          • protected byte buf[];
    • SequenceInputStream
      • 概要
        • 构造器
          • public SequenceInputStream(Enumeration<? extends InputStream> e){}
          • public SequenceInputStream(InputStream s1, InputStream s2){}
        • 成员变量
          • Enumeration<? extends InputStream> e;
          • InputStream in;
    • ObjectInputStream
      • 概要
        • 构造器
          • public ObjectInputStream(InputStream in){}
        • 方法
          • public final Object readObject(){}
  • OutputStream
    • FileOutputStream
      • 概要
        • 构造器
          • public FileOutputStream(String name){}
          • public FileOutputStream(String name, boolean append){}
          • public FileOutputStream(File file){}
          • public FileOutputStream(File file, boolean append){}
    • FilterOutputStream
      • BufferedOutputStream
        • 概要
          • 构造器
            • public BufferedOutputStream(OutputStream out){}
            • public BufferedOutputStream(OutputStream out, int size){}
          • 成员变量
            • protected byte buf[];
      • DataOutputStream
        • 概要
          • 构造器
            • public DataOutputStream(OutputStream out){}
          • 方法
            • writeInt().....
      • PrintStream
        • 字节打印流，标准输出流的对象
        • 概要
          • 构造器
            • public PrintStream(OutputStream out){}
            • public PrintStream(OutputStream out, boolean autoFlush){}
            • public PrintStream(OutputStream out, boolean autoFlush, String encoding){}
            • public PrintStream(String fileName){this(false, new FileOutputStream(fileName));}
            • public PrintStream(File file){}
            • public PrintStream(File file, String csn){}
          • 成员变量
            • private OutputStreamWriter charOut;
            • private BufferedWriter text
          • 方法
            • print()
            • println()
    • ByteArrayOutputStream
      • 概要
        • 构造器
          • public ByteArrayOutputStream(){}
          • public ByteArrayOutputStream(int size){}
        • 成员变量
          • protected byte buf[];
        • 方法
          • public synchronized byte toByteArray()[] {return Arrays.copyOf(buf, count);}
    • ObjectOutputStream
      • 概要
        • 构造器
          • public ObjectOutputStream(OutputStream out) {}
        • 方法
          • public final void writeObject(Object obj){}
• 字符流
  • Reader
    • InputStreamReader
      • 概要
        • 构造器
          • public InputStreamReader(InputStream in){}
          • public InputStreamReader(InputStream in, String charsetName){}
          • public InputStreamReader(InputStream in, Charset cs) {}
        • 方法
          • public String getEncoding(){}
        • 子类
          • FileReader
            • 概要
              • 构造器
                • super(new FileInputStream(...));
                • public FileReader(String fileName){}
                • public FileReader(File file){}
    • BufferedReader
      • 概要
        • 构造器
          • public BufferedReader(Reader in, int sz) {}
          • public BufferedReader(Reader in){}
        • 方法
          • public String readLine(){}
        • 成员变量
          • private Reader in;
          • private char cb[];
    • CharArrayReader
      • 概要
        • 构造器
          • public CharArrayReader(char buf[]){}
          • public CharArrayReader(char buf[], int offset, int length){}
        • 成员变量
          • protected char buf[];
    • StringReader
      • 概要
        • 构造器
          • public StringReader(String s){}
        • 成员变量
          • private String str;
  • Writer
    • OutputStreamWriter
      • 概要
        • 构造器
          • public OutputStreamWriter(OutputStream out, String charsetName){}
          • public OutputStreamWriter(OutputStream out) {}
          • public OutputStreamWriter(OutputStream out, Charset cs) {}
          • public FileOutputStream(File file, boolean append){}
        • 方法
          • public String getEncoding(){}
        • 子类
          • FileWriter
            • 概要
              • 构造器
                • super(new FileOutputStream(...))
                • public FileWriter(String fileName){}
                • public FileWriter(String fileName, boolean append){}
                • public FileWriter(File file) {}
                • public FileWriter(File file, boolean append){}
    • BufferedWriter
      • 概要
        • 构造器
          • public BufferedWriter(Writer out){}
          • public BufferedWriter(Writer out, int sz){}
          • 子主题
        • 方法
          • public void newLine(){}
        • 成员变量
          • private Writer out;
          • private char cb[];
    • CharArrayWriter
      • 概要
        • 构造器
          • public CharArrayWriter(){}
          • public CharArrayWriter(int initialSize){}
        • 成员变量
          • protected char buf[];
        • 方法
          • public char toCharArray()[] {synchronized (lock) {return Arrays.copyOf(buf, count);}}
    • StringWriter
      • 概要
        • 构造器
          • public StringWriter() {buf = new StringBuffer();lock = buf;}
          • public StringWriter(int initialSize){}
        • 成员变量
          • private StringBuffer buf;
        • 方法
          • public StringBuffer getBuffer(){}
    • PrintWriter
      • 字符打印流
      • 概要
        • 构造器
          • public PrintWriter (Writer out){}
          • public PrintWriter(OutputStream out){}
          • public PrintWriter(String fileName){}
          • public PrintWriter(File file){}
        • 成员变量
          • protected Writer out;
        • 方法
          • print()
          • println()
• 标准输入输出流
  • System.in
    • 通常作为Scanner的对象
  • System.out
    • 实则调用的是PrintStream的功能。为什么在控制台输出呢？是因为PrintStream printStream = new PrintStream(new FileOutputStream(FileDescriptor.out));