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📜  Java中的 PrintWriter println(boolean) 方法及示例

📅  最后修改于: 2022-05-13 01:54:39.304000             🧑  作者: Mango

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