filterwriter

FilterWriter类flush()方法 (FilterWriter Class flush() method)

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

  flush()方法在java.io包中可用。

• flush() method is used to flush out the string from this FilterWriter stream.

  flush()方法用于从此FilterWriter流中清除字符串。

• flush() 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.

  flush()方法是一种非静态方法，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。

• flush() method may throw an exception at the time of flushing the stream.

  flush()方法在刷新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 void flush();

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 flush() method of FilterWriter
import java.io.*;
public class FlushOfFW {
public static void main(String[] args) throws Exception {
Writer w_stm = null;
FilterWriter fw_stm = null;
String str = "Java World!!!";
try {
// Instantiates StringReader and 
// FilterReader
w_stm = new StringWriter();
fw_stm = new FilterWriter(w_stm) {};
// By using write() method is to
// write the given string to the
// stream fw_stm
fw_stm.write(str);
// By using flush() method is to
// flush the stream fw_stm
fw_stm.flush();
System.out.println("w_stm.toString(): " + w_stm.toString());
} 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 (fw_stm != null) {
fw_stm.close();
}
}
}
}

Output

输出量

w_stm.toString(): Java World!!!

翻译自: https://www.includehelp.com/java/filterwriter-flush-method-with-example.aspx

filterwriter