DataOutputStream類writeInt()方法 (DataOutputStream Class writeInt() method)

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

  writeInt()方法在java.io包中可用。

• writeInt() method is used to write the given integer value to the basic DataOutputStream as 4 bytes (i.e. 32 bit) and the variable counter is plus by 4 on successful execution.

  writeInt()方法用于將給定的整數值作為4個字節(即32位)寫入基本DataOutputStream，并且成功執行時變量計數器加4。

• writeInt() 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.

  writeInt()方法是一個非靜態方法，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。

• writeInt() method may throw an exception at the time of writing an integer.

  writeInt()方法在寫入整數時可能會引發異常。

  IOException: This exception may throw while getting any input/output error.

  IOException ：在獲取任何輸入/輸出錯誤時，可能引發此異常。

Syntax:

句法：

public final void writeInt(int val);

Parameter(s):

參數：

• int val – represents the integer value to be written to the data output stream.

  int val –表示要寫入數據輸出流的整數值。

Return value:

返回值：

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

該方法的返回類型為void ，不返回任何內容。

Example:

例：

// Java program to demonstrate the example // of void writeInt(int val) method // of DataOutputStreamimport java.io.*;public class WriteIntOfDOS {public static void main(String[] args) throws Exception {InputStream is_stm = null;DataInputStream dis_stm = null;FileOutputStream fos_stm = null;DataOutputStream dos_stm = null;int[] in = {10,20,30,40,50};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);for (int val: in ) {// By using writeInt() method isto// write int value to the// DataOutputStream dos_stmdos_stm.writeInt(val);}// By using flush() method isto// flush the bytes to the basic // output stream dos_stm.flush();// Loop To Read Available Data till endwhile (dis_stm.available() > 0) {// By using readInt() method isto read // int from dis_stmint val = dis_stm.readInt();System.out.println("dos_stm.writeInt(val): " + val);}} catch (Exception ex) {System.out.println(ex.toString());} finally {// To free system resources linked// with these streamsif (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

輸出量

dos_stm.writeInt(val): 10 dos_stm.writeInt(val): 20 dos_stm.writeInt(val): 30 dos_stm.writeInt(val): 40 dos_stm.writeInt(val): 50

翻譯自: https://www.includehelp.com/java/dataoutputstream-writeint-method-with-example.aspx

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