java.util.StirngTokenizer 示例代码

[jamesfancy]

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;

/**
 * <code>TestStringTokenizer</code> 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