ObjectInputStream類readChar()方法 (ObjectInputStream Class readChar() method)

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

  readChar()方法在java.io包中可用。

• readChar() method is used to read 2 byte (i.e. 16 bit) of character from this ObjectInputStream.

  readChar()方法用于從此ObjectInputStream讀取2個字節(即16位)的字符。

• readChar() 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.

  readChar()方法是一種非靜態方法，只能通過類對象訪問，如果嘗試使用類名稱訪問該方法，則會收到錯誤消息。

• readChar() method may throw an exception at the time of reading character.

  readChar()方法在讀取字符時可能會引發異常。

  • IOException: This exception may throw when getting any input/output error while performing.IOException ：在執行過程中遇到任何輸入/輸出錯誤時，可能引發此異常。
  • EOFException: This exception may throw when the end of the file is reached.EOFException ：到達文件末尾時，可能會引發此異常。

Syntax:

句法：

public char readChar();

Parameter(s):

參數：

• It does not accept any parameter.

  它不接受任何參數。

Return value:

返回值：

The return type of the method is char, it returns the two bytes character value read.

該方法的返回類型為char ，它返回讀取的兩個字節的字符值。

Example:

例：

// Java program to demonstrate the example // of char readChar() method of // ObjectInputStreamimport java.io.*;public class ReadCharOfOIS {public static void main(String[] args) throws Exception {// Instantiates ObjectOutputStream , ObjectInputStream // FileInputStream and FileOutputStreamFileOutputStream file_out_stm = new FileOutputStream("D:\\includehelp.txt");ObjectOutputStream obj_out_stm = new ObjectOutputStream(file_out_stm);FileInputStream file_in_stm = new FileInputStream("D:\\includehelp.txt");ObjectInputStream obj_in_stm = new ObjectInputStream(file_in_stm);// By using writeChar() method is to write// char to the obj_out_stm streamobj_out_stm.writeChar('J');obj_out_stm.writeChar('A');obj_out_stm.writeChar('V');obj_out_stm.writeChar('A');obj_out_stm.flush();while (obj_in_stm.available() > 0) {// By using readChar() method is to read// string characters one by one as a charchar val = (char) obj_in_stm.readChar();System.out.println("obj_in_stm.readChar(): " + val);}// By using close() method is to // close all the streams file_in_stm.close();file_out_stm.close();obj_in_stm.close();obj_out_stm.close();} }

Output

輸出量

obj_in_stm.readChar(): J obj_in_stm.readChar(): A obj_in_stm.readChar(): V obj_in_stm.readChar(): A

翻譯自: https://www.includehelp.com/java/objectinputstream-readdouble-method-with-example.aspx

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