ObjectOutputStream类writeChar()方法 (ObjectOutputStream Class writeChar() method)

• writeChar() method is available in java.io package.

  writeChar()方法在java.io包中可用。

• writeChar() method is used to write 2 bytes of a character value.

  writeChar()方法用于写入2个字节的字符值。

• writeChar() method is a non-static method, it is accessible with the class object only and if we try to access the method with the class name then we will get an error.

  writeChar()方法是一种非静态方法，只能通过类对象访问，如果尝试使用类名称访问该方法，则会收到错误消息。

• writeChar() method may throw an exception at the time of writing the character.

  writeChar()方法在编写字符时可能会引发异常。

  IOException: This exception may throw when getting any input/output error while writing to the output stream.

  IOException ：在写入输出流时遇到任何输入/输出错误时，可能引发此异常。

Syntax:

句法：

    public void writeChar(int value);

Parameter(s):

参数：

• int value – represents an integer that denotes a character to be written.

  int value –表示要写入的字符的整数。

Return value:

返回值：

The return type of the method is void, it returns nothing.

该方法的返回类型为void ，不返回任何内容。

Example:

例：

// Java program to demonstrate the example 
// of void writeChar(int value) method of
// ObjectOutputStream
import java.io.*;
public class WriteCharOfOOS {
public static void main(String[] args) throws Exception {
// Instantiates ObjectOutputStream , ObjectInputStream 
// FileInputStream and FileOutputStream
FileOutputStream file_out_stm = new FileOutputStream("D:\\includehelp.txt");
ObjectOutputStream obj_out_stm = new ObjectOutputStream(file_out_stm);
FileInputStream file_in_stm = new FileInputStream("C:\\includehelp.txt");
ObjectInputStream obj_in_stm = new ObjectInputStream(file_in_stm);
// By using writeChar() method is to
// write the char to the stream		
obj_out_stm.writeChar('a');
obj_out_stm.writeChar('d');
obj_out_stm.writeChar('e');
obj_out_stm.writeChar('b');
obj_out_stm.flush();
// By using readChar() method is to 
// read the char 
for (int i = 0; i < 4; ++i) {
char ch = obj_in_stm.readChar();
System.out.println("obj_in_stm.readChar(): " + ch);
}
// By using close() method is to 
// close all the streams 
System.out.println("Stream Shutdown... ");
file_in_stm.close();
file_out_stm.close();
obj_in_stm.close();
obj_out_stm.close();
}
}

Output

输出量

obj_in_stm.readChar(): a
obj_in_stm.readChar(): d
obj_in_stm.readChar(): e
obj_in_stm.readChar(): b
Stream Shutdown...

翻译自: https://www.includehelp.com/java/objectoutputstream-writechar-method-with-example.aspx