Java中的 PrintWriter println(char[]) 方法及示例

Java中PrintWriter类的println(char[])方法用于在流上打印指定的字符数组，然后换行。这个字符数组被作为一个参数。

句法：

public void println(char[] charArray)

参数：此方法接受一个强制参数charArray ，它是要在 Stream 中打印的字符数组。

返回值：此方法不返回任何值。

异常：如果指定的 charArray() 为 null，则此方法返回NullPointerException 。

下面的方法说明了 println(char[]) 方法的工作：

方案一：

// Java program to demonstrate
// PrintWriter println(char[]) method
  
import java.io.*;
  
class GFG {
    public static void main(String[] args)
    {
  
        try {
  
            // Create a PrintWriter instance
            PrintWriter writer
                = new PrintWriter(System.out);
  
            // Get the character array
            // to be printed in the stream
            char[] charArray = { 'G', 'e', 'e', 'k', 's',
                                 'F', 'o', 'r',
                                 'G', 'e', 'e', 'k', 's' };
  
            // print the charArray
            // to this writer using println() method
            // This will put the charArray in the stream
            // till it is printed on the console
            writer.println(charArray);
  
            writer.flush();
        }
        catch (Exception e) {
            System.out.println(e);
        }
    }
}

输出：

GeeksForGeeks

方案二：

// Java program to demonstrate
// PrintWriter println(char[]) method
  
import java.io.*;
  
class GFG {
    public static void main(String[] args)
    {
  
        try {
  
            // Create a PrintWriter instance
            PrintWriter writer
                = new PrintWriter(System.out);
  
            // Get the character array
            // to be printed in the stream
            char[] charArray = { 'G', 'F', 'G' };
  
            // print the charArray
            // to this writer using println() method
            // This will put the charArray in the stream
            // till it is printed on the console
            writer.println(charArray);
  
            writer.flush();
        }
        catch (Exception e) {
            System.out.println(e);
        }
    }
}

输出：

GFG