PrintWriter 用 Java 写(char[]，int，int)方法，示例

原文:https://www . geesforgeks . org/print writer-write char-int-int-method-in-Java-with-examples/

Java 中【PrintWriter】类的 write(char[]，int，int) 方法用于在流中写入指定字符数组的指定部分。这个字符数组作为一个参数。要写入的字符的起始索引和长度也作为参数。

语法:

public void write(char[]char array、int startingIndex、int lengthofchararray)

参数:该方法接受三个强制参数:

  • 字符数组是要写入流中的字符数组。
  • 起始索引是字符部分的起始索引。
  • 长度字符串是要写入流中的字符长度。

返回值:此方法不返回值。

下面的方法说明了 write(char[]，int，int)方法的工作原理:

程序 1:

// Java program to demonstrate
// PrintWriter write(char[], int, int) 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 written in the stream
            char[] charArray = { 'G', 'e', 'e', 'k', 's',
                                 'F', 'o', 'r',
                                 'G', 'e', 'e', 'k', 's' };

            // Get the starting index
            int startingIndex = 0;

            // Get the length of char
            int lengthOfCharArray = 5;

            // Write the portion of the charArray
            // to this writer using write() method
            // This will put the charArray in the stream
            // till it is printed on the console
            writer.write(charArray,
                         startingIndex,
                         lengthOfCharArray);

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

Output:

Geeks

程序 2:

// Java program to demonstrate
// PrintWriter write(char[], int, int) 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 written in the stream
            char[] charArray = { 'G', 'F', 'G' };

            // Get the starting index
            int startingIndex = 2;

            // Get the length of char
            int lengthOfCharArray = 1;

            // Write the portion of the charArray
            // to this writer using write() method
            // This will put the charArray in the stream
            // till it is printed on the console
            writer.write(charArray,
                         startingIndex,
                         lengthOfCharArray);

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

Output:

G

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