有用的J2ME类 – 字符串分词

StringTokenizer也是一个非常实用的J2ME的类。

下面的代码简单又有效。

public class StringTokenizer {
    private static final String DEFAULT_SEPARATORS = " \t\r\n";

    private Enumeration i;

    public StringTokenizer(final String source, final String separators) {
        parse(source != null ? source.toCharArray() : null, separators);
    }

    public StringTokenizer(final char[] source, final String separators) {
        parse(source, separators);
    }

    public StringTokenizer(final String source) {
        parse(source != null ? source.toCharArray() : null, DEFAULT_SEPARATORS);
    }

    public StringTokenizer(final char[] source) {
        parse(source, DEFAULT_SEPARATORS);
    }

    private void parse(final char[] source, final String separators) {
        if (source == null) {
            i = new Vector().elements();
        } else {
            final String seps = separators != null ? separators :
                                DEFAULT_SEPARATORS;
            final Vector tokens = new Vector(10);
            final StringBuffer token = new StringBuffer();
            final int length = source.length;
            for (int index = 0; index < length; index++) {
                if (seps.indexOf(source[index]) > -1) {
                    tokens.addElement(token.toString());
                    token.delete(0, token.length());
                } else {
                    token.append(source[index]);
                }
            }
            if (token.length() > 0) {
                tokens.addElement(token.toString());
            }
            i = tokens.elements();
        }
    }

    public boolean hasMoreTokens() {
        return i.hasMoreElements();
    }

    public String nextToken() {
        return (String) i.nextElement();
    }
}