Java Java.io.CharArrayWriter.append() 方法
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描述
java.io.CharArrayWriter.append(CharSequence csq, int start, int end)方法将指定字符序列的一部分附加到此编写器。 -
声明
以下是java.io.CharArrayWriter.append(CharSequence csq, int start, int end)方法的声明-public CharArrayWriter append(CharSequence csq, int start, int end)
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参数
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csq要附加的字符序列。如果字符序列为空,则在编写器后附加4个字符“空”。
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start -该部分中第一个字符的索引
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end子序列结尾后的字符索引
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返回值
这个CharArrayWriter -
异常
IndexOutOfBoundsException如果end大于序列的长度,则start大于end,或者start或end为负。 -
例子
以下示例显示java.io.CharArrayWriter.append(CharSequence csq,int start,int end)方法的用法。package com.jc2182; 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 sequence CharSequence csq = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"; // append character sequence to the writer chw.append(csq, 2, 5); // 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(); } } }
让我们编译并运行以上程序,这将产生以下结果-CDE