How to use

setLength

method

in

java.lang.StringBuilder

public void write(char ch) {
  if (ch == '\n' && this.buffer.length() > 0) {
    logger.debug(this.buffer.toString());
    this.buffer.setLength(0);
  }
  else {
    this.buffer.append(ch);
  }
}

public void write(char ch) {
  if (ch == '\n' && _sb.length() > 0) {
    _log.log(_level, _sb.toString());
    _sb.setLength(0);
  } else
    _sb.append((char) ch);
}

@Override
public void write(char[] buffer, int offset, int length) {
  for (int i = 0; i < length; i++) {
    char ch = buffer[offset + i];
    if (ch == '\n' && _sb.length() > 0) {
      _log.log(_level, _sb.toString());
      _sb.setLength(0);
    } else
      _sb.append((char) ch);
  }
}

public void write(char ch) {
  if (ch == '\n' && _sb.length() > 0) {
    _log.log(_level, _sb.toString());
    _sb.setLength(0);
  } else
    _sb.append((char) ch);
}

@Override
public void write(char[] buffer, int offset, int length) {
  for (int i = 0; i < length; i++) {
    char ch = buffer[offset + i];
    if (ch == '\n' && _sb.length() > 0) {
      _log.log(_level, _sb.toString());
      _sb.setLength(0);
    } else
      _sb.append((char) ch);
  }
}

@Override
public void write(char[] buffer, int offset, int length) {
  for (int i = 0; i < length; i++) {
    char ch = buffer[offset + i];
    if (ch == '\n' && this.buffer.length() > 0) {
      logger.debug(this.buffer.toString());
      this.buffer.setLength(0);
    }
    else {
      this.buffer.append(ch);
    }
  }
}

Entry(String key) {
 this.key = key;
 lengths = new long[valueCount];
 cleanFiles = new File[valueCount];
 dirtyFiles = new File[valueCount];
 // The names are repetitive so re-use the same builder to avoid allocations.
 StringBuilder fileBuilder = new StringBuilder(key).append('.');
 int truncateTo = fileBuilder.length();
 for (int i = 0; i < valueCount; i++) {
  fileBuilder.append(i);
  cleanFiles[i] = new File(directory, fileBuilder.toString());
  fileBuilder.append(".tmp");
  dirtyFiles[i] = new File(directory, fileBuilder.toString());
  fileBuilder.setLength(truncateTo);
 }
}

public StringBuilder stringBuilder() {
  StringBuilder sb = stringBuilder;
  if (sb == null) {
    return stringBuilder = new StringBuilder(STRING_BUILDER_INITIAL_SIZE);
  }
  if (sb.capacity() > STRING_BUILDER_MAX_SIZE) {
    sb.setLength(STRING_BUILDER_INITIAL_SIZE);
    sb.trimToSize();
  }
  sb.setLength(0);
  return sb;
}

/** Returns a description of the actor hierarchy, recursively. */
public String toString () {
  StringBuilder buffer = new StringBuilder(128);
  toString(buffer, 1);
  buffer.setLength(buffer.length() - 1);
  return buffer.toString();
}

@Override
public void println (String s) {
  buf.append(s);
  consoleLog(buf.toString());
  buf.setLength(0);
}

@Override
public void println (String s) {
  buf.append(s);
  consoleLog(buf.toString());
  buf.setLength(0);
}

/** Returns a description of the actor hierarchy, recursively. */
public String toString () {
  StringBuilder buffer = new StringBuilder(128);
  toString(buffer, 1);
  buffer.setLength(buffer.length() - 1);
  return buffer.toString();
}

public void reset() {
  timeFound = false;
  hours = -1;
  minutes = -1;
  seconds = -1;
  dayOfMonthFound = false;
  dayOfMonth = -1;
  monthFound = false;
  month = -1;
  yearFound = false;
  year = -1;
  cal.clear();
  sb.setLength(0);
}

@Override
public String nextToken(String delim)
  throws NoSuchElementException
{
  _delim=delim;
  _i=_lastStart;
  _token.setLength(0);
  _hasToken=false;
  return nextToken();
}

@Override
public String nextToken()
  throws NoSuchElementException
{
  if (!hasMoreTokens() || _token==null)
    throw new NoSuchElementException();
  String t=_token.toString();
  _token.setLength(0);
  _hasToken=false;
  return t;
}

  @Override
  public String toString () {
    stringBuilder.setLength(0);
    for (final ObjectMap.Entry<String, ObjectMap<String, String>> entry : snippets.entries()) {
      stringBuilder.append(entry.key).append(": {");
      for (final String snipname : entry.value.keys())
        stringBuilder.append(snipname).append(", ");
      stringBuilder.append("}\n");
    }
    return stringBuilder.toString();
  }
}

  @Override
  public String toString() {
    StringBuilder buf = new StringBuilder(super.toString());
    buf.setLength(buf.length() - 1);
    buf.append(", resolver: ").append(resolver());
    SocketAddress remoteAddress = remoteAddress();
    if (remoteAddress != null) {
      buf.append(", remoteAddress: ")
          .append(remoteAddress);
    }
    return buf.append(')').toString();
  }
}

public ShaderProgram load (String vertex, String fragment) {
  StringBuilder out = new StringBuilder();
  load(out, vertex);
  vertex = out.toString();
  includes.clear();
  out.setLength(0);
  load(out, fragment);
  fragment = out.toString();
  includes.clear();
  return new ShaderProgram(vertex, fragment);
}

public void render (boolean update) {
  fpsCounter.put(Gdx.graphics.getFramesPerSecond());
  if (update) update();
  beginRender(true);
  renderWorld();
  Gdx.gl.glDisable(GL20.GL_DEPTH_TEST);
  if (debugMode != DebugDrawModes.DBG_NoDebug) world.setDebugMode(debugMode);
  Gdx.gl.glEnable(GL20.GL_DEPTH_TEST);
  performance.setLength(0);
  performance.append("FPS: ").append(fpsCounter.value).append(", Bullet: ")
    .append((int)(performanceCounter.load.value * 100f)).append("%");
}

  @Override
  public Mono<Void> render(@Nullable Map<String, ?> model, @Nullable MediaType contentType,
      ServerWebExchange exchange) {
    StringBuilder builder = new StringBuilder();
    builder.append("name=").append(this.name).append('\n');
    for (Map.Entry<String, ?> entry : model.entrySet()) {
      builder.append(entry.getKey()).append('=').append(entry.getValue()).append('\n');
    }
    builder.setLength(builder.length() - 1);
    byte[] bytes = builder.toString().getBytes(StandardCharsets.UTF_8);
    ServerHttpResponse response = exchange.getResponse();
    DataBuffer buffer = response.bufferFactory().wrap(bytes);
    response.getHeaders().setContentType(MediaType.TEXT_PLAIN);
    return response.writeWith(Mono.just(buffer));
  }
}