Java.io.BufferedWriter.flush() 方法
描述
java.io.BufferedWriter.flush() 方法将字符从写入缓冲区刷新到作为预期目标的字符或字节流。
声明
以下是 java.io.BufferedWriter.flush() 方法的声明。
public Writer flush()
参数
NA
返回值
此方法不返回任何值。
异常
IOException − 如果发生 I/O 错误。
示例
下面的例子展示了 java.io.BufferedWriter.flush() 方法的使用。
package com.tutorialspoint;
import java.io.BufferedWriter;
import java.io.IOException;
import java.io.StringWriter;
public class BufferedWriterDemo {
public static void main(String[] args) throws IOException {
StringWriter sw = null;
BufferedWriter bw = null;
String letters = "ABCDEFGHIJK";
try {
// create string writer
sw = new StringWriter();
//create buffered writer
bw = new BufferedWriter(sw);
// for each character in the string
for (char c: letters.toCharArray()) {
// append character to the writer
bw.append(c);
// flush the characters to the intended stream
bw.flush();
// print string buffer from string writer
System.out.println(sw.getBuffer());
}
} catch(IOException e) {
// if I/O error occurs
e.printStackTrace();
} finally {
// releases any system resources associated with the stream
if(sw!=null)
sw.close();
if(bw!=null)
bw.close();
}
}
}
让我们编译并运行上面的程序,这将产生下面的结果 −
A AB ABC ABCD ABCDE ABCDEF ABCDEFG ABCDEFGH ABCDEFGHI ABCDEFGHIJ ABCDEFGHIJK

