Java List Count count(List lines)

Description

count

License

Apache License

Declaration

public static Map<String, Integer> count(List<String> lines) 

Method Source Code

//package com.java2s;
/*//from  w  ww  . j  a  v a2s.  com
 * Copyright 2002-2016 the original author or authors.
 *
 * 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.
 */

import java.util.HashMap;
import java.util.List;
import java.util.Map;

public class Main {
    private static final String DEBUG_KEY = "debug";
    private static final String INFO_KEY = "info";
    private static final String WARN_KEY = "warn";
    private static final String ERROR_KEY = "error";

    public static Map<String, Integer> count(List<String> lines) {
        Map<String, Integer> result = new HashMap<String, Integer>();
        for (String line : lines) {
            if (line.toLowerCase().contains(DEBUG_KEY)) {
                Integer currentCount = (result.get(DEBUG_KEY) == null ? 0 : result.get(DEBUG_KEY));
                result.put(DEBUG_KEY, currentCount + 1);
            } else if (line.toLowerCase().contains(INFO_KEY)) {
                Integer currentCount = (result.get(INFO_KEY) == null ? 0 : result.get(INFO_KEY));
                result.put(INFO_KEY, currentCount + 1);
            } else if (line.toLowerCase().contains(WARN_KEY)) {
                Integer currentCount = (result.get(WARN_KEY) == null ? 0 : result.get(WARN_KEY));
                result.put(WARN_KEY, currentCount + 1);
            } else if (line.toLowerCase().contains(ERROR_KEY)) {
                Integer currentCount = (result.get(ERROR_KEY) == null ? 0 : result.get(ERROR_KEY));
                result.put(ERROR_KEY, currentCount + 1);
            } else {
                throw new RuntimeException("unknown log level.");
            }
        }
        return result;
    }
}

Related

1. count(List l, int from, int to, Object what)
2. count(List values)
3. countAtLevel(List aList, int aLevel)
4. countNumber(List list, int number)
5. countOccurances(List encodings, int value)
6. countOccurence(List valueList, int value)