Java 中的 PrintStream flush()方法,示例

原文:https://www . geesforgeks . org/print stream-flush-method-in-Java-with-examples/

Java 中 PrintStream 类的 flush() 方法用于冲洗该流。通过冲洗流,这意味着清除流中可能存在或可能不存在的任何元素。它既不接受任何参数,也不返回值。

语法:

public void flush()

参数:该方法不接受任何参数。

返回值:此方法不返回值。它只是冲向溪流。

下面的方法说明了 flush()方法的工作原理:

程序 1:

// Java program to demonstrate
// PrintStream flush() method

import java.io.*;

class GFG {
    public static void main(String[] args)
    {

        // The string to be written in the Stream
        String str = "GeeksForGeeks";

        try {

            // Create a PrintStream instance
            PrintStream stream
                = new PrintStream(System.out);

            // Write the above string to this stream
            // This will put the string in the stream
            // till it is printed on the console
            stream.print(str);

            // Now clear the stream
            // using flush() method
            stream.flush();
        }
        catch (Exception e) {
            System.out.println(e);
        }
    }
}

Output:

GeeksForGeeks

程序 2:

// Java program to demonstrate
// PrintStream flush() method

import java.io.*;

class GFG {
    public static void main(String[] args)
    {

        try {

            // Create a PrintStream instance
            PrintStream stream
                = new PrintStream(System.out);

            // Write the char to this stream
            // This will put the char in the stream
            // till it is printed on the console
            stream.write(65);

            // Now clear the stream
            // using flush() method
            stream.flush();
        }
        catch (Exception e) {
            System.out.println(e);
        }
    }
}

Output:

A