java reader_Java Reader close（）方法与示例

落日映苍穹つ 2023-03-05 12:49 21阅读 0赞

java reader

## Reader类的close()方法 **(**Reader 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 Reader stream and free all system resources linked with the stream when we call any of its methods after closing the stream will result an exception.
    
    **close()方法**用于关闭此Reader流，并在关闭流后调用其任何方法时释放与该流链接的所有系统资源，这将导致异常。
 *  **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.
    
    **IOException** ：遇到任何输入/输出错误时，可能引发此异常。

**Syntax:**

**句法：**

public abstract 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 Reader
    
    import java.io.*;
    
    public class CloseOfR {
        
        public static void main(String[] args) throws Exception {
        
            Reader r_stm = null;
    
            try {
        
                // Instantiates Reader
                r_stm = new StringReader("Java World!!!!");
    
                // By using close() method is to
                // close this r_stm stream
                r_stm.close();
    
                // when we call read() method
                // after closing the stream will
                // result an exception
                r_stm.read();
            } 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 (r_stm != null) {
        
                    r_stm.close();
                }
            }
        }
    }

**Output**

**输出量**

Stream Closed Before!!!

> 翻译自: [https://www.includehelp.com/java/reader-close-method-with-example.aspx][https_www.includehelp.com_java_reader-close-method-with-example.aspx]

java reader

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