jodd-core/src/main/java/jodd/system/SystemUtil.java
public static long getLong(final String name, final long defaultValue) {
		String value = get(name);
		if (value == null) {
			return defaultValue;
		}

		value = value.trim().toLowerCase();
		try {
			return Long.parseLong(value);
		}
		catch (NumberFormatException nfex) {
			return defaultValue;
		}
	}
public static long getLong(final String name, final long defaultValue) {
		String value = get(name);
		if (value == null) {
			return defaultValue;
		}

		value = value.trim().toLowerCase();
		try {
			return Long.parseLong(value);
		}
		catch (NumberFormatException nfex) {
			return defaultValue;
		}
	}
Returns system property as a long.