Java中的 StringWriter write(char[], int, int) 方法及示例

Java中StringWriter类的write(char[], int, int)方法用于将指定字符数组的指定部分写入到writer上。这个字符数组被作为一个参数。要写入的字符的起始索引和长度也作为参数。

句法：

public void write(char[] charArray, int startingIndex, int lengthOfCharArray)

编程需要懂一点英语

参数：此方法接受三个强制参数：

charArray是要写入 writer 的字符数组。
起始索引，它是从中获取字符部分的起始索引。
lengthOfCharArray是要写入写入器的字符长度。

返回值：此方法不返回任何值。

下面的程序说明了 write(char[], int, int) 方法的工作：

方案一：

// Java program to demonstrate
// StringWriter write(char[], int, int) method
  
import java.io.*;
  
class GFG {
    public static void main(String[] args)
    {
  
        try {
  
            // Create a StringWriter instance
            StringWriter writer
                = new StringWriter();
  
            // Get the character array
            // to be written in the writer
            char[] charArray = { 65, 66, 67 };
  
            // Get the starting index
            int startingIndex = 0;
  
            // 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 writer
            // till it is printed on the console
            writer.write(charArray,
                         startingIndex,
                         lengthOfCharArray);
  
            System.out.println(writer.toString());
        }
        catch (Exception e) {
            System.out.println(e);
        }
    }
}

输出：

方案二：

// Java program to demonstrate
// StringWriter write(char[], int, int) method
  
import java.io.*;
  
class GFG {
    public static void main(String[] args)
    {
  
        try {
  
            // Create a StringWriter instance
            StringWriter writer
                = new StringWriter();
  
            // Get the character array
            // to be written in the writer
            char[] charArray = { 97, 98, 99 };
  
            // 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 writer
            // till it is printed on the console
            writer.write(charArray,
                         startingIndex,
                         lengthOfCharArray);
  
            System.out.println(writer.toString());
        }
        catch (Exception e) {
            System.out.println(e);
        }
    }
}

输出：