Java Writer append(CharSequence, int, int)用法及代碼示例

Java中Writer類的append(CharSequence，int，int)方法用於將指定charSequence的指定部分追加到writer上。此charSequence用作參數。要寫入的開始索引和結束索引也被當作參數。

用法:

public void append(CharSequence charSequence, int startingIndex, int endingIndex)

參數：此方法接受三個強製參數：

charSequence這是要寫入流中的charSequence。
startingIndex這是獲取字符部分的起始索引。
endingIndex這是要寫在編寫器上的結尾索引。

返回值：此方法不返回任何值。

下麵的方法說明了append(CharSequence，int，int)方法的用法方式：

程序1:

// Java program to demonstrate 
// Writer append(CharSequence, 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 charSequence 
            // to be written in the writer 
            CharSequence charSequence = "GeeksForGeeks"; 
  
            // Get the starting index 
            int startingIndex = 0; 
  
            // Get the length of char 
            int endingIndex = 5; 
  
            // Write the portion of the charSequence 
            // to this writer using append() method 
            // This will put the charSequence in the writer 
            // till it is printed on the console 
            writer.append(charSequence, 
                          startingIndex, 
                          endingIndex); 
  
            writer.flush(); 
        } 
        catch (Exception e) { 
            System.out.println(e); 
        } 
    } 
}

輸出：

Geeks

程序2:

// Java program to demonstrate 
// Writer append(CharSequence, 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 charSequence 
            // to be written in the writer 
            CharSequence charSequence = "GFG"; 
  
            // Get the starting index 
            int startingIndex = 2; 
  
            // Get the length of char 
            int endingIndex = 3; 
  
            // Write the portion of the charSequence 
            // to this writer using append() method 
            // This will put the charSequence in the writer 
            // till it is printed on the console 
            writer.append(charSequence, 
                          startingIndex, 
                          endingIndex); 
  
            writer.flush(); 
        } 
        catch (Exception e) { 
            System.out.println(e); 
        } 
    } 
}

輸出：

相關用法

注：本文由純淨天空篩選整理自Code_r大神的英文原創作品 Writer append(CharSequence, int, int) method in Java with Examples。非經特殊聲明，原始代碼版權歸原作者所有，本譯文未經允許或授權，請勿轉載或複製。