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StrTokDemo4c.javaAPI DocExample1520Wed Oct 10 10:20:16 BST 2001None

StrTokDemo4c

public class StrTokDemo4c extends Object
Show using a StringTokenizer including getting the delimiters back This final version returns a List instead of converting to an array.

Fields Summary
public static final String
DELIM
The delimiter used between fields on input.
Constructors Summary
Methods Summary
public static voidmain(java.lang.String[] a)

		printResults("A|B|C|D", process("A|B|C|D"));
		printResults("A||C|D", process("A||C|D"));
		printResults("A|||D|E", process("A|||D|E"));
public static voidprintResults(java.lang.String input, java.util.List outputs)

		System.out.println("Input: " + input);
		Iterator it = outputs.iterator();
		for (int i=0; it.hasNext(); i++)
			System.out.println("Output " + i + " was: " + it.next());
public static java.util.Listprocess(java.lang.String line)
Processes one String, returns it as an array of fields


	           
	     
		// A ArrayList is an array-like container that grows dynamically;
		// see the chapter on Java Collections.
		ArrayList results = new ArrayList();

		// Unless you ask StringTokenizer to give you the tokens,
		// it silently discards multiple null tokens.
		StringTokenizer st = new StringTokenizer(line, DELIM, true);

		int i = 0;
		// Stuff each token into the Vector
		while (st.hasMoreTokens()) {
			String s = st.nextToken();
			if (s.equals(DELIM)) {
				// Just ignore the "tokens" that consist of DELIM
				// But leave a blank entry corresponding to the missing field
				if (results.size() < ++i)
					results.add(null);
				continue;
			}
			results.add(s);
		}
		
		return results;