Java 中 PrintWriter println(char[])方法,示例

原文:https://www . geesforgeks . org/print writer-printlnchar-method-in-Java-with-examples-2/

Java 中 PrintWriter 类的 println(char[]) 方法用于打印流上指定的字符数组,然后换行。这个字符数组作为一个参数。

语法:

public void println(char[] charArray)

参数:该方法接受一个强制参数字符数组,它是要在流中打印的字符数组。

返回值:此方法不返回值。

异常:如果指定的 charArray()为空,此方法返回空指针异常

下面的方法说明了 println(char[])方法的工作原理:

程序 1:

// 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);
        }
    }
}

Output:

GeeksForGeeks

程序 2:

// 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);
        }
    }
}

Output:

GFG