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What is the difference between byte stream and character stream in java

王林

Release： 2020-11-25 15:46:47

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What is the difference between byte stream and character stream in java

##The difference analysis is as follows:

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Byte (Byte) is the basic data unit for io operations. When the program outputs byte data, you can use the OutputStream class to complete

Such definitions As follows:

public abstract class OutputStream
extends Object
implements Cloneable Flushable{}

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In the OutputStream class, two parent interfaces Closeable Flushable are implemented

The definitions of these two interfaces are as follows

public interface Cloneable
extends AutoCloseable{
	public void close() throws IOException;
}

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public interface Flushable{
	public void flush() throws IOException;
}

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OutputStream defines a common byte output Operation, since it is defined as an abstract class, you need to rely on subclasses for object instantiation. If you need to output the file content through a program, you can use the FileOutputStream subclass

Reading and writing functions of character streams

	/**
	 * 字符流写功能
	 * @throws IOException 
	 */
	public static void demo4() throws IOException {
	Writer writer = new FileWriter("J:/demo2.txt",true);
	writer.write(123);
	writer.write("一二三");
	writer.write(879);
	writer.flush();
	writer.close();
	}
	
	/**
	 * 字符流读功能
	 * @throws IOException 
	 */
	
	public static void demo5() throws IOException {
		Reader reader = new FileReader("J:/demo2.txt");
		System.out.println((char)reader.read());
		System.out.println((char)reader.read());
		
		int a = 0;
		while((a=reader.read()) != -1) {
			System.out.println((char)reader.read());
		}
		
		reader.close();
	}

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Create files and write content

/**
	 * 创建文件并写入内容
	 * 
	 * @throws IOException
	 */
	public static void demo1() throws IOException {
		File file = new File("J:/demo.txt"); // 创建这个文件
		OutputStream os = new FileOutputStream(file, true); // 创建流对象 最后加个true参数代表是续写不是重写,不写true的话下一次运行这个方法就是清空内容并且重写
		os.write(10);// 添加内容
		os.write(302);// 添加内容
		os.write(11);// 添加内容
		os.write("hello world".getBytes()); // 上面是添加数字类型, 这一行代表添加字符
		os.close(); // 关闭流
	}

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The biggest difference between the two types of operation streams is that the character stream uses a buffer (this is more suitable for Chinese data operations), while the byte stream uses bytes. Data processing operations.

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