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GitHub Repository: jackfrued/Python-100-Days
 Path: blob/master/番外篇/code/Test03.java
Views: 729
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import java.util.List;

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import java.util.ArrayList;

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import java.util.Collections;

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class Test03 {

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    /**

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     * 产生[min, max)范围的随机整数

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     */

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    public static int randomInt(int min, int max) {

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        return (int) (Math.random() * (max - min) + min);

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    }

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    public static void main(String[] args) {

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        List<Integer> redBalls = new ArrayList<>();

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        for (int i = 1; i <= 33; ++i) {

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            redBalls.add(i);

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        }

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        List<Integer> selectedBalls = new ArrayList<>();

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        for (int i = 0; i < 6; ++i) {

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            selectedBalls.add(redBalls.remove(randomInt(0, redBalls.size())));

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        }

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        Collections.sort(selectedBalls);

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        selectedBalls.add(randomInt(1, 17));

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        for (int i = 0; i < selectedBalls.size(); ++i) {

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            System.out.printf("%02d ", selectedBalls.get(i));

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            if (i == selectedBalls.size() - 2) {

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                System.out.print("| ");

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            }

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        }

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        System.out.println();

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    }

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}

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