Java Utililty Methods Throwable to String

StringTokenizer tokens = new StringTokenizer(toString(t), "\n\r");
StringBuilder trace = new StringBuilder();
for (int i = 0; i < numLines; i++) {
    String token = tokens.nextToken();
    trace.append(token);
    trace.append("\n");
return trace.toString();
...

String stackTrace = getStackTrace(throwable);
if (stackTrace.indexOf("\tat") != -1) {
    return stackTrace.substring(stackTrace.indexOf("\tat"));
} else {
    return "";

String result = EMPTY_STRING;
if (currentEx != null) {
    final StringWriter stringWriter = new StringWriter();
    currentEx.printStackTrace(new PrintWriter(stringWriter));
    result = stringWriter.toString();
return result;

StringWriter stringWriter = new StringWriter();
PrintWriter printWriter = new PrintWriter(stringWriter);
printWriter.print(cause.getMessage() + delimiter);
printWriter.print("(" + cause.getClass().getName() + ")" + delimiter);
printWriter.println();
StackTraceElement[] stackTrace = cause.getStackTrace();
for (int i = 0; i < stackTrace.length; i++) {
    printWriter.print(stackTrace[i] + delimiter);
...

String str = null;
try {
    java.io.StringWriter sw = new java.io.StringWriter();
    e.printStackTrace(new java.io.PrintWriter(sw));
    str = sw.toString();
} catch (Throwable t) {
    str = e.toString();
return str;

List lines = new ArrayList();
try {
    ByteArrayOutputStream baos = new ByteArrayOutputStream();
    PrintStream ps = new PrintStream(baos);
    t.printStackTrace(ps);
    String stackTraces = baos.toString();
    StringTokenizer st = new StringTokenizer(stackTraces, "\n");
    while (st.hasMoreTokens()) {
...

StringWriter sw = null;
PrintWriter pw = null;
try {
    sw = new StringWriter();
    pw = new PrintWriter(sw);
    pw.println(throwable.toString());
    throwable.printStackTrace(pw);
    pw.flush();
...

StringWriter sw = new StringWriter();
PrintWriter pw = new PrintWriter(sw);
pw.println(throwable.toString());
throwable.printStackTrace(pw);
pw.flush();
return sw.toString();

if (tr == null) {
    return "";
Throwable t = tr;
while (t.getCause() != null) {
    t = t.getCause();
StringWriter sw = new StringWriter();
...

String result = "";
StackTraceElement[] trace = throwable.getStackTrace();
result += throwable.getLocalizedMessage();
for (StackTraceElement element : trace) {
    result += "\n at " + element;
return result + "\n";