Java.io.CharArrayWriter.append() 方法

描述

java.io.CharArrayWriter.append(CharSequence csq) 方法將指定的字元序列追加到此寫入器。

宣告

以下是 java.io.CharArrayWriter.append(CharSequence csq) 方法的宣告：

public CharArrayWriter append(CharSequence csq)

引數

csq - 要追加的字元序列。如果字元序列為 null，則寫入器會追加 4 個字元 'null'。

返回值

此 CharArrayWriter

異常

無

示例

以下示例演示了 java.io.CharArrayWriter.append(CharSequence csq) 方法的使用。

package com.tutorialspoint;

import java.io.CharArrayWriter;

public class CharArrayWriterDemo {
   public static void main(String[] args) {      
      CharArrayWriter chw = null;
      
      try {
         // create character array writer
         chw = new CharArrayWriter();
         
         // declare character sequences
         CharSequence csq = "12345 ";
         CharSequence csq1 = "67890 ";
         CharSequence csq2 = "ABCDE ";
         CharSequence csq3 = "abcde ";
         
         // append character sequences to the writer
         chw.append(csq);
         chw.append(csq1);
         chw.append(csq2);
         chw.append(csq3);
         
         // prints out the character sequences
         System.out.println(chw.toString());
         
      } catch(Exception e) {
         // for any error
         e.printStackTrace();
      } finally {
         // releases all system resources from writer
         if(chw!=null)
            chw.close();
      }
   }
}

讓我們編譯並執行上述程式，這將產生以下結果：

12345 67890 ABCDE abcde