if (StringUtil.isBlank(start)) {
                startPosition = fessConfig.getPagingSearchPageStartAsInteger();
            } else {
                try {
                    startPosition = Integer.parseInt(start);
                } catch (final NumberFormatException e) {
                    startPosition = fessConfig.getPagingSearchPageStartAsInteger();
                }
            }

import static com.google.common.cache.TestingRemovalListeners.countingRemovalListener;
import static com.google.common.truth.Truth.assertThat;
import static com.google.common.truth.Truth.assertWithMessage;
import static java.lang.Integer.parseInt;
import static java.util.Arrays.asList;
import static java.util.concurrent.TimeUnit.MILLISECONDS;
import static java.util.concurrent.TimeUnit.MINUTES;

import com.google.common.cache.TestingCacheLoaders.IdentityLoader;

   *
   * @throws NumberFormatException if the string does not contain a valid unsigned {@code int} value
   * @throws NullPointerException if {@code s} is null (in contrast to {@link
   *     Integer#parseInt(String)})
   */
  @CanIgnoreReturnValue
  public static int parseUnsignedInt(String s) {
    return parseUnsignedInt(s, 10);
  }

  /**

 */

package com.google.common.net;

import static com.google.common.truth.Truth.assertThat;
import static com.google.common.truth.Truth.assertWithMessage;
import static java.lang.Integer.parseInt;
import static org.junit.Assert.assertThrows;

import com.google.common.annotations.GwtIncompatible;
import com.google.common.annotations.J2ktIncompatible;
import com.google.common.collect.ImmutableSet;

import static com.google.common.base.Preconditions.checkNotNull;
import static com.google.common.base.Preconditions.checkPositionIndexes;
import static java.lang.Byte.toUnsignedInt;
import static java.lang.Integer.parseInt;
import static java.security.AccessController.doPrivileged;
import static java.util.Objects.requireNonNull;

import com.google.common.annotations.GwtIncompatible;
import com.google.common.annotations.J2ktIncompatible;

    default int getSystemPropertyAsInt(final String key, final int defaultValue) {
        final String value = getSystemProperty(key);
        if (value != null) {
            try {
                return Integer.parseInt(value);
            } catch (final NumberFormatException e) {
                // ignore
            }
        }
        return defaultValue;
    }

      if (isNullOrEmpty(value)) {
        throw new IllegalArgumentException("value of key " + key + " omitted");
      }
      try {
        parseInteger(spec, Integer.parseInt(value));
      } catch (NumberFormatException e) {
        throw new IllegalArgumentException(
            format("key %s value set to %s, must be integer", key, value), e);
      }
    }
  }

      if (isNullOrEmpty(value)) {
        throw new IllegalArgumentException("value of key " + key + " omitted");
      }
      try {
        parseInteger(spec, Integer.parseInt(value));
      } catch (NumberFormatException e) {
        throw new IllegalArgumentException(
            format("key %s value set to %s, must be integer", key, value), e);
      }
    }
  }

            prop.load(in);
            version = prop.getProperty("fess.version", "0.0.0");
            final String[] values = version.split("\\.");
            majorVersion = Integer.parseInt(values[0]);
            minorVersion = Integer.parseInt(values[1]);
            productVersion = majorVersion + "." + minorVersion;
            System.setProperty("fess.version", version);

            int dayForCleanup = -1;
            if (StringUtil.isNotBlank(options.expires)) {
                dayForCleanupStr = options.expires;
                try {
                    dayForCleanup = Integer.parseInt(dayForCleanupStr);
                } catch (final NumberFormatException e) {
                    if (logger.isDebugEnabled()) {