Java.io.CharArrayWriter.append() 方法

描述

java.io.CharArrayWriter.append(CharSequence csq) 方法将特定的字符序列附加到这个 writer。

声明

以下是 java.io.CharArrayWriter.append(CharSequence csq) 方法的声明 −

public CharArrayWriter append(CharSequence csq)

参数

csq − 要附加的字符序列。 如果字符序列为 null，则 writer 附加 4 个字符 'null'。

返回值

这个 CharArrayWriter

异常

NA

示例

下面的例子展示了 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();
      }
   }
}

让我们编译并运行上面的程序，这将产生下面的结果 −

12345 67890 ABCDE abcde