OutputStream类close()方法 (OutputStream Class close() method)

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

  close()方法在java.io包中可用。

• close() method is used to close this OutputStream stream and free all system resources linked with this stream and it cannot be re-opened and perform any output operation once it is closed.

  close()方法用于关闭此OutputStream流并释放与此流链接的所有系统资源，并且一旦关闭它就无法重新打开并执行任何输出操作。

• close() 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.

  close()方法是一个非静态方法，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。

• close() method may throw an exception at the time of closing the stream.

  close()方法在关闭流时可能会引发异常。

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

  IOException ：在执行过程中遇到任何输入/输出错误时，可能引发此异常。

Syntax:

句法：

public void close();

Parameter(s):

参数：

• It does not accept any parameter.

  它不接受任何参数。

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 close() method // of OutputStreamimport java.io.*;public class CloseOfOS {
    public static void main(String[] args) throws Exception {
     OutputStream os_stm = null;  InputStream is_stm = null;  int val = 65;  try {
      // Instantiates FileOutputStream and    // FileInputStream    os_stm = new FileOutputStream("D:\\includehelp.txt");   is_stm = new FileInputStream("D:\\includehelp.txt");   // By using close() method is to close   // the stream and when we call write, read   // after closing the stream will result an    // exception   os_stm.close();   // Loop to write byte to the stream   for (int i = 0; i < 3; ++i) {
       os_stm.write(val);    val++;   }   // Loop to read byte from the stream   for (int i = 0; i < 3; ++i) {
       char ch = (char) is_stm.read();    System.out.println("ch: " + ch);   }  } 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 (is_stm != null) {
       is_stm.close();    if (os_stm != null) {
        os_stm.close();    }   }  } }}

Output

输出量

Stream Closed Before...

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