正则表达式笔记

import java.io.Console;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class RegexTestHarness {

	public static void main(String[] args) {
		Console console = System.console();
		if (console == null) {
			System.err.println("No console.");
			System.exit(1);
		}

		while (true) {
			Pattern pattern = Pattern.compile(console
					.readLine("%nEnter your regex: "));
			Matcher matcher = pattern.matcher(console
					.readLine("Enter input string to search: "));
			boolean found = false;
			while (matcher.find()) {
				console.format("I found the text \"%s\" starting at index %d "
						+ "and ending at index %d.%n", matcher.group(),
						matcher.start(), matcher.end());
				found = true;
			}
			if (!found) {
				console.format("No match found.%n");
			}
		}
	}
}

cmd javac RegexTestHarness.java

cmd java RegexTestHarness

在cmd下测试正则。

正则表达式笔记