java.io.CharArrayWriter.append(CharSequence csq)方法範例

java.io.CharArrayWriter.append(CharSequence csq) 方法會將特定的字元序列到這個writer。

宣告

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

public CharArrayWriter append(CharSequence csq)

引數

• csq - 字元序列進行追加。如果字元序列為空，writer被追加4個字元'null'。

返回值

當前的CharArrayWriter

異常

• NA

例子

下面的範例演示java.io.CharArrayWriter.append(CharSequence csq)方法的用法。

package com.yiibai;

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();
      }
   }
}

讓我們來編譯和執行上面的程式，這將產生以下結果：

12345 67890 ABCDE abcde