Java中的 PrintWriter println(boolean) 方法及示例

Java中PrintWriter类的println(boolean)方法用于在流上打印指定的布尔值，然后换行。这个布尔值被当作一个参数。

句法：

public void println(boolean booleanValue)

参数：此方法接受一个强制参数booleanValue ，它是要写入流的布尔值。

返回值：此方法不返回任何值。

下面的方法说明了 println(boolean) 方法的工作：

方案一：

// Java program to demonstrate
// PrintWriter println(boolean) method
  
import java.io.*;
  
class GFG {
    public static void main(String[] args)
    {
  
        try {
  
            // Create a PrintWriter instance
            PrintWriter printr
                = new PrintWriter(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
            printr.println(true);
  
            printr.flush();
        }
        catch (Exception e) {
            System.out.println(e);
        }
    }
}

输出：

true

方案二：

// Java program to demonstrate
// PrintWriter println(boolean) method
  
import java.io.*;
  
class GFG {
    public static void main(String[] args)
    {
  
        try {
  
            // Create a PrintWriter instance
            PrintWriter printr
                = new PrintWriter(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
            printr.println(false);
  
            printr.flush();
        }
        catch (Exception e) {
            System.out.println(e);
        }
    }
}

输出：

false