FileInputStream类close()方法 (FileInputStream 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 FileInputStream and free all system resources linked with this stream.

  close()方法用于关闭此FileInputStream并释放与此流链接的所有系统资源。

• 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 while getting any input/output error or when this stream is closed by close() method.

  IOException ：在获取任何输入/输出错误时或通过close()方法关闭此流时，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 FileInputStream
import java.io.*;
public class CloseOfFIS {
public static void main(String[] args) throws Exception {
FileInputStream fis_stm = null;
int count = 0;
try {
// Instantiates FileInputStream
fis_stm = new FileInputStream("D:\\includehelp.txt");
// By using read() method is to read
// a byte from fis_stm
count = fis_stm.read();
// Display corresponding bytes value
byte b = (byte) count;
// Display value of b
System.out.println("fis_stm.read(): " + b);
// By using close() method is to close
// close the stream     
fis_stm.close();
// when we call read() method after
// closing the stream will result an exception
count = fis_stm.read();
} catch (Exception ex) {
System.out.println(ex.toString());
} finally {
// with the help of this block is to
// free all necessary resources linked
// with the stream
if (fis_stm != null) {
fis_stm.close();
}
}
}
}

Output

输出量

fis_stm.read(): 0
java.io.IOException: Stream Closed

翻译自: https://www.includehelp.com/java/fileinputstream-close-method-with-example.aspx