Java Writer flush()方法及示例

Java中Writer类的flush()方法是用来冲刷写程序的。通过冲刷写入器，它意味着清除写入器中的任何元素，这些元素可能在或不在写入器中。它既不接受任何参数，也不返回任何值。

语法。

public void flush()

参数。此方法不接受任何参数。

返回值。这个方法不返回任何值。它只是刷新了写入器。

下面的方法说明了flush()方法的工作。

程序 1:

// Java program to demonstrate
// Writer flush() method
  
import java.io.*;
  
class GFG {
    public static void main(String[] args)
    {
  
        // The string to be written in the writer
        String str = "GeeksForGeeks";
  
        try {
  
            // Create a Writer instance
            Writer writer
                = new PrintWriter(System.out);
  
            // Write the above string to this writer
            // This will put the string in the writer
            // till it is printed on the console
            writer.write(str);
  
            // Now clear the writer
            // using flush() method
            writer.flush();
        }
        catch (Exception e) {
            System.out.println(e);
        }
    }
}

输出:

GeeksForGeeks

程序2。

// Java program to demonstrate
// Writer flush() method
  
import java.io.*;
  
class GFG {
    public static void main(String[] args)
    {
  
        try {
  
            // Create a Writer instance
            Writer writer
                = new PrintWriter(System.out);
  
            // Write the char to this writer
            // This will put the char in the writer
            // till it is printed on the console
            writer.write(65);
  
            // Now clear the writer
            // using flush() method
            writer.flush();
        }
        catch (Exception e) {
            System.out.println(e);
        }
    }
}

输出:

A