assertEquals("", joiner.join(array));

    StringBuilder sb1FromIterable = new StringBuilder();
    assertSame(sb1FromIterable, joiner.appendTo(sb1FromIterable, set));
    assertEquals(0, sb1FromIterable.length());

    StringBuilder sb1FromIterator = new StringBuilder();
    assertSame(sb1FromIterator, joiner.appendTo(sb1FromIterator, set));

public class SystemMonitorTarget extends MonitorTarget {
    private static final Logger logger = LogManager.getLogger(SystemMonitorTarget.class);

    @Override
    public void expired() {
        final StringBuilder buf = new StringBuilder(1000);

        buf.append("[SYSTEM MONITOR] ");
        buf.append('{');

        appendOsStats(buf);
        appendProcessStats(buf);
        appendJvmStats(buf);
        appendFesenStats(buf);

    public String format(long size, ScaleUnit unit, boolean omitSymbol) {
        StringBuilder sb = new StringBuilder();
        format(sb, size, unit, omitSymbol);
        return sb.toString();
    }

    public void format(StringBuilder builder, long size) {
        format(builder, size, null, false);
    }

    public void format(StringBuilder builder, long size, ScaleUnit unit) {
        format(builder, size, unit, false);

        String direction = event.getRequestType() == TransferEvent.RequestType.PUT ? "to" : "from";

        TransferResource resource = event.getResource();
        StringBuilder message = new StringBuilder();
        message.append(action).append(' ').append(direction).append(' ').append(resource.getRepositoryId());
        message.append(": ");

    }

    protected long getCurrentTimeMillis() {
        return ComponentUtil.getSystemHelper().getCurrentTimeAsLong();
    }

    private StringBuilder createStringBuffer(final Object keyObj, final long time) {
        final StringBuilder buf = new StringBuilder(1000);
        buf.append("url:").append(getUrl(keyObj));
        buf.append('\t');
        buf.append("time:").append(FessFunctions.formatDate(new Date(time)));

    }

    public String getOriginalMessage() {
        return originalMessage;
    }

    protected static String constructArtifactPath(List<String> path, String indentation) {
        StringBuilder sb = new StringBuilder();

        if (path != null) {
            sb.append(LS);
            sb.append(indentation);
            sb.append("Path to dependency: ");
            sb.append(LS);
            int num = 1;

    private static final char BOX_CHAR = '*';

    private static final Pattern S_FILTER = Pattern.compile("\\s+");

    public static String separatorLine() {
        StringBuilder sb = new StringBuilder(DEFAULT_MAX_SIZE);
        repeat(sb, '*', DEFAULT_MAX_SIZE);
        return sb.toString();
    }

    public static List<String> format(String... lines) {
        int size = DEFAULT_MAX_SIZE;

        stream(values).of(stream -> stream.forEach(argList::add));
        return this;
    }

    @Override
    public String execute() {
        final StringBuilder resultBuf = new StringBuilder();

        if (sessionId == null) { // create session id
            sessionId = RandomStringUtils.randomAlphabetic(15);
        }
        resultBuf.append("Session Id: ").append(sessionId).append("\n");

     * @return The user-friendly source hint, never {@code null}.
     */
    static String toSourceHint(Model model) {
        if (model == null) {
            return "";
        }

        StringBuilder buffer = new StringBuilder(128);

        buffer.append(toId(model));

        Path pomPath = model.getPomPath();
        if (pomPath != null) {
            buffer.append(" (").append(pomPath).append(')');
        }

    public String getId() {
        return "flat";
    }

    public String pathOf(Artifact artifact) {
        ArtifactHandler artifactHandler = artifact.getArtifactHandler();

        StringBuilder path = new StringBuilder(128);

        path.append(artifact.getArtifactId()).append(ARTIFACT_SEPARATOR).append(artifact.getVersion());

        if (artifact.hasClassifier()) {