Java 中的 PrintStream println(布尔)方法,示例

原文:https://www . geeksforgeeks . org/print stream-println boolean-in-Java-method-with-examples/

Java 中 【打印流】 类的 println(布尔)方法用于打印流上指定的布尔值,然后换行。这个布尔值被作为一个参数。

语法:

public void println(boolean booleanValue)

参数:该方法接受一个强制参数布尔值,它是要写入流中的布尔值。

返回值:此方法不返回值。

下面的方法说明了 println(布尔)方法的工作原理:

程序 1:

// Java program to demonstrate
// PrintStream println(boolean) method

import java.io.*;

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

        try {

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

            // Print the boolean value 'true'
            // to this stream using println() method
            // This will put the booleanValue in the
            // stream till it is printed on the console
            stream.println(true);

            stream.flush();
        }
        catch (Exception e) {
            System.out.println(e);
        }
    }
}

Output:

true

程序 2:

// Java program to demonstrate
// PrintStream println(boolean) method

import java.io.*;

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

        try {

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

            // Print the boolean value 'false'
            // to this stream using println() method
            // This will put the booleanValue in the
            // stream till it is printed on the console
            stream.println(false);

            stream.flush();
        }
        catch (Exception e) {
            System.out.println(e);
        }
    }
}

Output:

false