The java.io package provides classes that allow you to convert between Unicode character streams and byte streams of non-Unicode text. With the InputStreamReader class, you can convert byte streams to character streams. You use the OutputStreamWriter class to translate character streams into byte ...
1、字节流(Byte Stream) 在计算机中,byte是相当于机器语言中的单词,他在Java中统一由InputStream和OutputStream作处理。 2、字符流(Character Stream) 而在编码体系中,一般采用Char(2 bytes),他在Java中统一由Reader和Writer作处理。 InputStream, OutputStream, Reader和Writer,作为在java.io.*包的顶级父类,定义...
1packagecom.zyjhandsome.io;23importjava.io.*;45publicclassFileInputStreamTest {67publicstaticvoidmain(String[] args){8//用于 保存呢实际读取的字节数9inthasRead = 0;10//创建字节输入流11FileInputStream fis =null;12try{13fis =newFileInputStream("D:\\zhaoyingjun\\eclipse-workspace\\CollectionTes...
InputStream 类 /** This abstract class is the superclass of all classes representing an input stream of bytes. 这个抽象类是所有字节输入流的超类 Applications that need to define a subclass of InputStream must always provide a method that returns the next byte of input. 应用程序需要定义一个Inpu...
private static final int DEFAULT_BYTE_BUFFER_SIZE = 8192; private Charset cs; private CharsetDecoder decoder; private ByteBuffer bb; // 由上述的 forInputStreamReader方法的参数可知用的是下面这个方法 public static StreamDecoder forInputStreamReader(InputStream in,Object lock,String charsetName) throws Un...
Abstract superclass Reader and Writer 除了操作和字符集转换(这非常复杂)之外,基于字符的I / O几乎与基于字节的I / O相同。 而不是InputStream和OutputStream,我们使用Reader和Writer来进行基于字符的I / O。 抽象超类Reader操作char,它声明一个抽象方法read()从输入源读取一个字符。
int i = 128; byte b = (byte)i; System.out.println(b); //输出 -128【原因:127+1=-128】 float a=1.01; int b = a; System.out.println(b); //输出 1 Object a="hello"; String b =(String) a; //此时必须强转,因为提供的是Object而要求接收到的是String 数据类型自动提升 在参与运算...
Portions of this page are modifications based on work created and shared by theAndroid Open Source Projectand used according to terms described in theCreative Commons 2.5 Attribution License. Constructors ByteArrayInputStream(Byte[], Int32, Int32) ...
setBinaryStream(SQLServerCallableStatement) setBoolean 方法 (SQLServerCallableStatement) setByte 方法 (SQLServerCallableStatement) setBytes 方法 (SQLServerCallableStatement) setCharacterStream 方法(SQLServerCallableStatement) setCharacterStream 方法(SQLServerCallableStatement) setCharacterStream 方法 (java....
public final void setCharacterStream(int n, java.io.Reader reader, int length) 參數 n int ,指出參數編號。 reader Reader 物件。 length 字元數。 例外 SQLServerException 備註 這個setCharacterStream 方法是由 java.sql.PreparedStatement 介面中的 setCharacterStream 方法所指定。 如果此資料流的長度與 le...