Java FileOutputStream close()用法及代碼示例

FileOutputStream類close()方法

• close() 方法可在java.io包。
• close() 方法用於關閉此 FileOutputStream 並釋放與此流鏈接的所有係統資源。
• close() 方法是一個非靜態方法，它隻能通過類對象訪問，如果我們嘗試使用類名訪問方法，那麽我們將得到一個錯誤。
• close() 方法在關閉流時不會拋出異常。

用法:

    public void close();

參數：

• 它不接受任何參數。

返回值：

該方法的返回類型是void，它什麽都不返回。

例：

// Java program to demonstrate the example 
// of void close() method of FileOutputStream

import java.io.*;

public class CloseOfFOS {
 public static void main(String[] args) throws Exception {
  FileOutputStream fos_stm = null;

  try {
   // Instantiates FileOutputStream
   fos_stm = new FileOutputStream("D:\\includehelp.txt");

   // By using close() method is to close
   // close the stream     
   fos_stm.close();

   // when we call write() method after
   // closing the stream will result an exception
   fos_stm.write(100);
   fos_stm.flush();
   fos_stm.close();
  } catch (Exception ex) {
   System.out.println("Stream Closed Before...!!!!");
  } finally {
   // with the help of this block is to
   // free all necessary resources linked
   // with the stream
   if (fos_stm != null) {
    fos_stm.close();
   }
  }
 }
}

輸出

Stream Closed Before...!!!!