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			<h2>Java StringTokenizer 类使用方法</h2>				<h3><em>分类</em> <a href="/w3cnote_genre/code" title="编程技术">编程技术</a> </h3>

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Java StringTokenizer 属于 java.util 包，用于分隔字符串。

StringTokenizer 构造方法：

  • 1. StringTokenizer(String str) ：构造一个用来解析 str 的 StringTokenizer 对象。java 默认的分隔符是空格("")、制表符(\t)、换行符(\n)、回车符(\r)。
  • 2. StringTokenizer(String str, String delim) ：构造一个用来解析 str 的 StringTokenizer 对象，并提供一个指定的分隔符。
  • 3. StringTokenizer(String str, String delim, boolean returnDelims) ：构造一个用来解析 str 的 StringTokenizer 对象，并提供一个指定的分隔符，同时，指定是否返回分隔符。

StringTokenizer 常用方法：

  • 1. int countTokens()：返回nextToken方法被调用的次数。
  • 2. boolean hasMoreTokens()：返回是否还有分隔符。
  • 3. boolean hasMoreElements()：返回是否还有分隔符。
  • 4. String nextToken()：返回从当前位置到下一个分隔符的字符串。
  • 5. Object nextElement()：返回从当前位置到下一个分隔符的字符串。
  • 6. String nextToken(String delim)：与 4 类似，以指定的分隔符返回结果。

实例 1

import java.util.*;

public class Main

{

public static void main(String[] args)

{

String str = "runoob,google,taobao,facebook,zhihu";

// 以 , 号为分隔符来分隔字符串

StringTokenizer st=new StringTokenizer(str,",");

while(st.hasMoreTokens()) {

System.out.println(st.nextToken());

}

}

}

输出结果为：

runoob

google

taobao

facebook

zhihu

实例 2

import java.util.*;

public class Main

{

public static void main(String args[])

{

System.out.println("使用第一种构造函数：");

StringTokenizer st1 = new StringTokenizer("Hello Runoob How are you", " ");

while (st1.hasMoreTokens())

System.out.println(st1.nextToken());

    </span><span class="hl-identifier">System</span><span class="hl-code">.</span><span class="hl-identifier">out</span><span class="hl-code">.</span><span class="hl-identifier">println</span><span class="hl-brackets">(</span><span class="hl-quotes">"</span><span class="hl-string">使用第二种构造函数：</span><span class="hl-quotes">"</span><span class="hl-brackets">)</span><span class="hl-code">;

    </span><span class="hl-identifier">StringTokenizer</span><span class="hl-code"> </span><span class="hl-identifier">st2</span><span class="hl-code"> = </span><span class="hl-reserved">new</span><span class="hl-code"> </span><span class="hl-identifier">StringTokenizer</span><span class="hl-brackets">(</span><span class="hl-quotes">"</span><span class="hl-string">JAVA : Code : String</span><span class="hl-quotes">"</span><span class="hl-code">, </span><span class="hl-quotes">"</span><span class="hl-string"> :</span><span class="hl-quotes">"</span><span class="hl-brackets">)</span><span class="hl-code">;

    </span><span class="hl-reserved">while</span><span class="hl-code"> </span><span class="hl-brackets">(</span><span class="hl-identifier">st2</span><span class="hl-code">.</span><span class="hl-identifier">hasMoreTokens</span><span class="hl-brackets">(</span><span class="hl-brackets">)</span><span class="hl-brackets">)</span><span class="hl-code">

        </span><span class="hl-identifier">System</span><span class="hl-code">.</span><span class="hl-identifier">out</span><span class="hl-code">.</span><span class="hl-identifier">println</span><span class="hl-brackets">(</span><span class="hl-identifier">st2</span><span class="hl-code">.</span><span class="hl-identifier">nextToken</span><span class="hl-brackets">(</span><span class="hl-brackets">)</span><span class="hl-brackets">)</span><span class="hl-code">;

    </span><span class="hl-identifier">System</span><span class="hl-code">.</span><span class="hl-identifier">out</span><span class="hl-code">.</span><span class="hl-identifier">println</span><span class="hl-brackets">(</span><span class="hl-quotes">"</span><span class="hl-string">使用第三种构造函数：</span><span class="hl-quotes">"</span><span class="hl-brackets">)</span><span class="hl-code">;

    </span><span class="hl-identifier">StringTokenizer</span><span class="hl-code"> </span><span class="hl-identifier">st3</span><span class="hl-code"> = </span><span class="hl-reserved">new</span><span class="hl-code"> </span><span class="hl-identifier">StringTokenizer</span><span class="hl-brackets">(</span><span class="hl-quotes">"</span><span class="hl-string">JAVA : Code : String</span><span class="hl-quotes">"</span><span class="hl-code">, </span><span class="hl-quotes">"</span><span class="hl-string"> :</span><span class="hl-quotes">"</span><span class="hl-code">,  </span><span class="hl-reserved">true</span><span class="hl-brackets">)</span><span class="hl-code">;

    </span><span class="hl-reserved">while</span><span class="hl-code"> </span><span class="hl-brackets">(</span><span class="hl-identifier">st3</span><span class="hl-code">.</span><span class="hl-identifier">hasMoreTokens</span><span class="hl-brackets">(</span><span class="hl-brackets">)</span><span class="hl-brackets">)</span><span class="hl-code">

        </span><span class="hl-identifier">System</span><span class="hl-code">.</span><span class="hl-identifier">out</span><span class="hl-code">.</span><span class="hl-identifier">println</span><span class="hl-brackets">(</span><span class="hl-identifier">st3</span><span class="hl-code">.</span><span class="hl-identifier">nextToken</span><span class="hl-brackets">(</span><span class="hl-brackets">)</span><span class="hl-brackets">)</span><span class="hl-code">;

</span><span class="hl-brackets">}</span><span class="hl-code">

}

输出结果为：

使用第一种构造函数：

Hello

Runoob

How

are

you

使用第二种构造函数：

JAVA

Code

String

使用第三种构造函数：

JAVA

:

Code

:

String
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