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25 lines
945 B
Java
25 lines
945 B
Java
List<Country> europe = new ArrayList<Country>();
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europe.add(new Country(81903000,357121.41,"Germany"));
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europe.add(new Country(64667000,668763, "France"));
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europe.add(new Country( 4985900,385199, "Norway"));
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europe.add(new Country( 9514406,450295, "Sweden"));
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europe.add(new Country(47212990,504645, "Spain"));
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europe.add(new Country( 8014000, 41285, "Switzerland"));
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europe.add(new Country( 36371, 2.02, "Monaco"));
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Collections.sort(europe, new Comparator<Country>(){
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@Override
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public int compare(Country o1, Country o2) {
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double o1Density = o1.population / o1.area;
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double o2Density = o2.population / o2.area;
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if (Math.abs(o1Density - o2Density) < 0.00001) {
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return 0;
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} else if (o1Density > o2Density) {
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return 1;
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} else {
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return -1;
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}
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}
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});
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// Now it's sorted according to the logic in the internal comparator
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System.out.println(europe);
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