java.util.StirngTokenizer 示例代码

示例代码如下，代码说明请看注释：

/*
 * @(#) TestStringTokenizer.java
 * by James Fancy
 * on 2003-9-27
 */

import java.util.StringTokenizer;

/** *//**
 * TestStringTokenizer 类给出了三个示例，
 * 演示了 StringTokenizer 类 的常见用法。
 *
 * @author James Fancy on 2003-9-27 9:12:34
 */
public final class TestStringTokenizer ...{

    public final static void main(String[] args) ...{
    TestStringTokenizer test = new TestStringTokenizer();
    test.test1();
    test.test2();
    test.test3();
    }

    String source = "abcdefg;hijklmn|opqrst,uvw.xyz";

    String source3 = "The file "Good Java Code.txt" is in dir"
        + " "My Documents" of volume "Doc Volume"";

    String delim = ";,.|"; // 包含分号、逗号、句点、竖址分隔符

    String delim2 = " ""; // 包含空格、引号

    String delim3 = """; // 仅包含引号

    /** *//**
     * 演示 StringTokenizer 最常用的用法，
     * 使用 StringTokenizer(String, String) 构造 Tokenizer。
     */
    public void test1() ...{
    this.printSeparater("TEST1");
    StringTokenizer tokenizer;
    tokenizer = new StringTokenizer(source, delim);

    while (tokenizer.hasMoreTokens()) ...{
        System.out.println(tokenizer.nextToken());
    }
    }

    /** *//**
     * 演示 StringTokenizer 的 nextToken(String) 用法
     */
    public void test2() ...{
    this.printSeparater("TEST2");
    StringTokenizer tokenizer = new StringTokenizer(source);
    while (tokenizer.hasMoreTokens()) ...{
        System.out.println(tokenizer.nextToken(delim));
    }
    }

    /** *//**
     * 一个较综合的示例，它拆分一句话，将每个单词拆分出来，
     * 其中，被双引号包含 的若干单词被处理为一个单词输出。
     */
    public void test3() ...{
    this.printSeparater("TEST3");
    String delim = delim2;
    String word;
    boolean begin = false;

    StringTokenizer tokenizer = new StringTokenizer(source3, delim, true);
    while (tokenizer.hasMoreTokens()) ...{
        word = tokenizer.nextToken(delim);
        if (word.equals(""")) ...{
        if (begin) ...{
            delim = delim2;
            begin = false;
        } else ...{
            delim = delim3;
            begin = true;
        }
        } else if (!word.equals(" ")) ...{
        System.out.println(word);
        }
    }
    }

    private void printSeparater(String title) ...{
    System.out.println("--------- " + title + " ---------");
    }

}

运行结果如下，看看是不是你根据代码猜想的一样：

--------- TEST1 ---------
abcdefg
hijklmn
opqrst
uvw
xyz
--------- TEST2 ---------
abcdefg
hijklmn
opqrst
uvw
xyz
--------- TEST3 ---------
The
file
Good Java Code.txt
is
in
dir
My Documents
of
volume
Doc Volume