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| 1 | +package apijson.demo.server; |
| 2 | + |
| 3 | +public class MathUtil { |
| 4 | + |
| 5 | + public static long plus(long a, long b) { |
| 6 | + return a + b; |
| 7 | + } |
| 8 | + public static double plus(double a, double b) { |
| 9 | + return a + b; |
| 10 | + } |
| 11 | + public static double plus(Number a, Number b) { |
| 12 | + return plus(a.doubleValue(), b.doubleValue()); |
| 13 | + } |
| 14 | + |
| 15 | + public static long minus(long a, long b) { |
| 16 | + return a - b; |
| 17 | + } |
| 18 | + public static double minus(double a, double b) { |
| 19 | + return a - b; |
| 20 | + } |
| 21 | + public static double minus(Number a, Number b) { |
| 22 | + return minus(a.doubleValue(), b.doubleValue()); |
| 23 | + } |
| 24 | + |
| 25 | + public static long multiply(long a, long b) { |
| 26 | + return a * b; |
| 27 | + } |
| 28 | + public static double multiply(double a, double b) { |
| 29 | + return a * b; |
| 30 | + } |
| 31 | + public static double multiply(Number a, Number b) { |
| 32 | + return multiply(a.doubleValue(), b.doubleValue()); |
| 33 | + } |
| 34 | + |
| 35 | + public static double divide(long a, long b) { |
| 36 | + return divide((double) a, (double) b); //直接相除会白自动强转为 long,1/2 = 0 ! a / b; |
| 37 | + } |
| 38 | + public static double divide(double a, double b) { |
| 39 | + return a / b; |
| 40 | + } |
| 41 | + public static double divide(Number a, Number b) { |
| 42 | + return divide(a.doubleValue(), b.doubleValue()); |
| 43 | + } |
| 44 | + |
| 45 | + public static long pow(long a, long b) { |
| 46 | + return (long) Math.pow(a, b); |
| 47 | + } |
| 48 | + public static double pow(double a, double b) { |
| 49 | + return Math.pow(a, b); |
| 50 | + } |
| 51 | + public static double pow(Number a, Number b) { |
| 52 | + return pow(a.doubleValue(), b.doubleValue()); |
| 53 | + } |
| 54 | + |
| 55 | + public static double sqrt(long a) { |
| 56 | + return Math.sqrt(a); |
| 57 | + } |
| 58 | + public static double sqrt(double a) { |
| 59 | + return Math.sqrt(a); |
| 60 | + } |
| 61 | + public static double sqrt(Number a) { |
| 62 | + return sqrt(a.doubleValue()); |
| 63 | + } |
| 64 | + |
| 65 | + public static Long computeAsync(long a, long b, TestInterface callback) { |
| 66 | + callback.setData("Mock outer interface success!"); |
| 67 | + Boolean sort = callback.sort(); |
| 68 | + if (sort != null && sort && a > b) { |
| 69 | + callback.minusAsId(b, a); |
| 70 | + } |
| 71 | + else { |
| 72 | + callback.minusAsId(a, b); |
| 73 | + } |
| 74 | + return callback.getId(); |
| 75 | + } |
| 76 | + |
| 77 | + public static Number computeAsync(long a, long b, Callback callback) { |
| 78 | + |
| 79 | + new Thread(new Runnable() { |
| 80 | + |
| 81 | + @Override |
| 82 | + public void run() { |
| 83 | + try { |
| 84 | + Thread.sleep(3000); |
| 85 | + } catch (Exception e) {} |
| 86 | + |
| 87 | + Boolean sort = callback.sort(); |
| 88 | + if (sort != null && sort && a > b) { |
| 89 | + callback.minusAsId(b, a); |
| 90 | + } else { |
| 91 | + callback.minusAsId(a, b); |
| 92 | + } |
| 93 | + |
| 94 | + callback.setData("Mock inner interface success!"); |
| 95 | + } |
| 96 | + }).start(); |
| 97 | + |
| 98 | + return callback.getId(); |
| 99 | + } |
| 100 | + |
| 101 | + |
| 102 | + public static <D> D computeAsync(long a, long b, D d, Callback1<D> callback) { |
| 103 | + callback.minusAsId(a, b); |
| 104 | + callback.setData(d); |
| 105 | + return callback.getData(); |
| 106 | + } |
| 107 | + |
| 108 | + public static <L, D> Callback2<L, D> computeAsync(L a, L b, D d, Callback2<L, D> callback) { |
| 109 | + callback.setA(a); |
| 110 | + callback.setB(b); |
| 111 | + callback.setData(d); |
| 112 | + callback.append(a, b); |
| 113 | + return callback; |
| 114 | + } |
| 115 | + |
| 116 | + //需要用 $ 隔开内部类与它所在的类 apijson.demo.server.MathUtil$Callback |
| 117 | + public interface Callback2<L, D> { |
| 118 | + void setId(L id); |
| 119 | + L getId(); |
| 120 | + |
| 121 | + void setData(D data); |
| 122 | + D getData(); |
| 123 | + |
| 124 | + void setA(L a); |
| 125 | + L getA(); |
| 126 | + |
| 127 | + void setB(L b); |
| 128 | + L getB(); |
| 129 | + |
| 130 | + default String append(L a, L b) { |
| 131 | + return "a=" + a + "; b=" + b; |
| 132 | + } |
| 133 | + } |
| 134 | + |
| 135 | + public interface Callback1<D> extends Callback2<Long, D> { |
| 136 | + Boolean sort(); |
| 137 | + |
| 138 | + default void minusAsId(long a, long b) { |
| 139 | + setA(a); |
| 140 | + setB(b); |
| 141 | + setId(a + b); |
| 142 | + } |
| 143 | + } |
| 144 | + |
| 145 | + public interface Callback extends Callback1<String> { |
| 146 | + static long currentTime() { |
| 147 | + return System.currentTimeMillis(); |
| 148 | + } |
| 149 | + |
| 150 | + @Override |
| 151 | + default void minusAsId(long a, long b) { |
| 152 | + System.out.println("minusAsId startTime: " + currentTime()); |
| 153 | + setA(a); |
| 154 | + setB(b); |
| 155 | + setId(a + b); |
| 156 | + System.out.println("minusAsId endTime: " + currentTime()); |
| 157 | + } |
| 158 | + } |
| 159 | + |
| 160 | +} |
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