Between 1.5.0_05 and 1.5.0_06 a length limit on 248 characters
was introduced on relative paths which can cause severe grievances
for people upgrading. Before the "fix" files of length 260 could be used.

import java.io.*;

public class TestPathLength {
	private static String longFilename = "C:\\tmp\\.\\";
	private static String padding = "1234567890123456789012345678901234567890012345678900123456789001234567890012345678900123456789001234567890012345678900123456789001234567890012345678900123456789001234567890012345678900123456789001234567890012345678900123456789001234567890012345678900123456789001234567890012345678900123456789001234567890012345678900123456789001234567890";
	
	public static void main(String[] args) {
		for (int i = 230; i < 260; i++) {
			String tmpName = longFilename + padding.substring(0, i) + ".txt";
			try {
				FileWriter fw = new FileWriter(tmpName);
				fw.close();
			} catch (Exception e) {
				System.out.println("Failed at length: " + tmpName.length());
				break;
			}
		}
	}
}