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Java 1.8+ Library with tons of utility classes required in all projects

There is a newer version: 11.1.10

/*
 * Copyright (C) 2014-2022 Philip Helger (www.helger.com)
 * philip[at]helger[dot]com
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *         http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.helger.commons.csv;

import java.io.IOException;

import javax.annotation.Nullable;

/**
 * Base interface for a single line reader.
 *
 * @author Philip Helger
 */
@FunctionalInterface
public interface ICSVLineReader
{
  /**
   * Reads the next line from the Reader.
   *
   * @return Line read from reader or null if none is left.
   * @throws IOException
   *         on error from underlying {@link java.io.Reader}
   */
  @Nullable
  String readLine () throws IOException;
}