编写器用 Java 编写(String，int，int)方法，示例

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

Java 中 Writer 类的 write(String，int，int) 方法用于在流中写入指定字符串的指定部分。该字符串被视为参数。要写入的字符串的起始索引和长度也作为参数。

语法:

公共空写(字符串，int startingIndex，int lengthOfstring)

参数:该方法接受三个强制参数:

  • 字符串是要写入流中的字符串。
  • 起始索引是字符部分的起始索引。
  • 字符串长度是要写入流中的字符串长度。

返回值:此方法不返回值。

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

程序 1:

// Java program to demonstrate
// Writer write(String, int, int) method

import java.io.*;

class GFG {
    public static void main(String[] args)
    {

        try {

            // Create a Writer instance
            Writer writer
                = new PrintWriter(System.out);

            // Get the String
            // to be written in the stream
            String string = "GeeksForGeeks";

            // Get the starting index
            int startingIndex = 0;

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

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

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

Output:

Geeks

程序 2:

// Java program to demonstrate
// Writer write(String, int, int) method

import java.io.*;

class GFG {
    public static void main(String[] args)
    {

        try {

            // Create a Writer instance
            Writer writer
                = new PrintWriter(System.out);

            // Get the String
            // to be written in the stream
            String string = "GFG";

            // Get the starting index
            int startingIndex = 2;

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

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

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

Output:

G

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