CharArrayWriter append(CharSequence csq）

描述

所述java.io.CharArrayWriter.append（CSQ的CharSequence）方法附加的特定字符序列添加到此作家。

声明

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

public CharArrayWriter append(CharSequence csq)

参数

csq - 要追加的字符序列。如果字符序列为null，则编写器附加4个字符“null”。

返回值

This CharArrayWriter

异常

NA

实例

以下示例显示了java.io.CharArrayWriter.append（CharSequence csq）方法的用法。

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，这将产生以下结果

12345 67890 ABCDE abcde