DataOutputStream类writeChar()方法 (DataOutputStream 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 the given value as 2 bytes of character value to the basic data output stream and the variable counter is plus by 2 on successful execution.

  writeChar()方法用于将给定值(字符值的2个字节)写入基本数据输出流，并且变量计数器在成功执行时加2。

• 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 while getting any input/output error.

  IOException ：在获取任何输入/输出错误时，可能引发此异常。

Syntax:

句法：

public final void writeChar(int val);

Parameter(s):

参数：

• int val – represents the integer value to be written as a character to the basic data output stream.

  int val –表示要作为字符写入基本数据输出流的整数值。

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 val) method // of DataOutputStreamimport java.io.*;public class WriteCharOfDOS {
    public static void main(String[] args) throws IOException {
     InputStream is_stm = null;  DataInputStream dis_stm = null;  FileOutputStream fos_stm = null;  DataOutputStream dos_stm = null;  byte[] b_arr = {
      65,   68,   97,   98,   99  };  try {
      // Instantiate FileInputStream,    // DataInputStream, FileOutputStream   // and DataOutputStream    fos_stm = new FileOutputStream("C:\\Users\\Preeti Jain\\Desktop\\programs\\includehelp.txt");   dos_stm = new DataOutputStream(fos_stm);   is_stm = new FileInputStream("C:\\Users\\Preeti Jain\\Desktop\\programs\\includehelp.txt");   dis_stm = new DataInputStream(is_stm);   // Loop to write each byte till end   for (byte val: b_arr) {
       // By using writeChar() method isto    // write a char value to the    // DataOutputStream dos_stm    dos_stm.writeChar(val);   }   // By using flush() method isto   // flush the bytes to the basic    // output stream            dos_stm.flush();   // Loop To Read Available Data till end   while (dis_stm.available() > 0) {
       // By using readChar() method isto read     // byte from dis_stm    char ch = dis_stm.readChar();    System.out.println("dis_stm.writeChar(): " + ch);   }  } catch (Exception ex) {
      System.out.println(ex.toString());  } finally {
      // To free system resources linked   // with these streams   if (is_stm != null)    is_stm.close();   if (dis_stm != null)    dis_stm.close();   if (dos_stm != null)    dos_stm.close();   if (fos_stm != null)    fos_stm.close();  } }}

Output

输出量

dis_stm.writeChar(): Adis_stm.writeChar(): Ddis_stm.writeChar(): adis_stm.writeChar(): bdis_stm.writeChar(): c

翻译自: