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Java SWT/JFace Utility Library including a Preferences Framework, Lightweight HTTP Server and macOS support.

There is a newer version: 20.1.0

package io.github.albertus82.util;

import java.io.PrintWriter;
import java.io.StringWriter;
import java.util.logging.Level;
import java.util.logging.Logger;

import io.github.albertus82.util.logging.LoggerFactory;

public class ExceptionUtils {

	private static final Logger log = LoggerFactory.getLogger(ExceptionUtils.class);

	private ExceptionUtils() {
		throw new IllegalAccessError("Utility class");
	}

	public static String getStackTrace(final Throwable e) {
		if (e != null) {
			StringWriter sw = null;
			PrintWriter pw = null;
			try {
				sw = new StringWriter();
				pw = new PrintWriter(sw);
				e.printStackTrace(pw);
				return sw.toString();
			}
			catch (final RuntimeException re) {
				log.log(Level.WARNING, "Cannot convert stack trace to string:", re);
			}
			finally {
				IOUtils.closeQuietly(pw, sw);
			}
		}
		return "";
	}

	public static String getUIMessage(final Throwable throwable) {
		String message = "";
		if (throwable != null) {
			if (StringUtils.isNotBlank(throwable.getLocalizedMessage())) {
				message = throwable.getLocalizedMessage();
			}
			else if (StringUtils.isNotBlank(throwable.getMessage())) {
				message = throwable.getMessage();
			}
			else {
				message = throwable.getClass().getSimpleName();
			}

			if (StringUtils.isNotBlank(message)) {
				message = message.trim();
				if (!message.endsWith(".")) {
					message += ".";
				}
			}
		}
		return message;
	}

	public static String getLogMessage(final Throwable throwable) {
		String message = "";
		if (throwable != null) {
			message = throwable.getClass().getSimpleName();
			if (StringUtils.isNotBlank(throwable.getLocalizedMessage()) || StringUtils.isNotBlank(throwable.getMessage())) {
				message += ": " + (StringUtils.isNotBlank(throwable.getLocalizedMessage()) ? throwable.getLocalizedMessage() : throwable.getMessage());
			}

			if (StringUtils.isNotBlank(message)) {
				message = message.trim();
				if (!message.endsWith(".")) {
					message += ".";
				}
			}
		}
		return message;
	}

}