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  1. import java.util.Arrays;
  2. import java.util.List;
  3. import java.util.Map;
  4. import java.util.TreeMap;
  5.  
  6. import java.util.regex.Pattern;
  7.  
  8. public final class Main {
  9.  
  10.   public static Map<String, Integer> compile(final List<String> input) {
  11.     final Map<String, Integer> map = new TreeMap<String, Integer>();
  12.     final Pattern space = Pattern.compile("\\s+");
  13.     for (final String line : input) {
  14.       final String[] parts = space.split(line, 0);
  15.       final String name = parts[0];
  16.       final int addendum = Integer.valueOf(parts[1]);
  17.       final Integer old = map.get(name);
  18.       map.put(name, old == null ? addendum : old + addendum);
  19.     }
  20.     return map;
  21.   }
  22.  
  23.   public static void main(final String[] argv) {
  24.     for (final Map.Entry<String, Integer> entry :
  25.         compile(Arrays.asList("AAA 100", "BBB 200", "CCC 300", "AAA 50"))
  26.             .entrySet()) {
  27.       System.out.println(entry.getKey() + " " + entry.getValue());
  28.     }
  29.   }
  30. }
Success #stdin #stdout 0.07s 215680KB
comments (?)
stdin
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Standard input is empty
stdout
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AAA 150
BBB 200
CCC 300
https://ideone.com/EHg46
language:
Java (12.0.1)
created:
13 years ago
visibility:
public

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