Package java.util

Examples of java.util.Random.nextInt()

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    }

    private static String getString(int id) {
        StringBuilder buff = new StringBuilder();
        Random rnd = new Random(id);
        int len = rnd.nextInt(40);
        for (int i = 0; i < len; i++) {
            String s = "bcdfghklmnprstwz";
            char c = s.charAt(rnd.nextInt(s.length()));
            buff.append(i == 0 ? Character.toUpperCase(c) : c);
            s = "aeiou  ";
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        StringBuilder buff = new StringBuilder();
        Random rnd = new Random(id);
        int len = rnd.nextInt(40);
        for (int i = 0; i < len; i++) {
            String s = "bcdfghklmnprstwz";
            char c = s.charAt(rnd.nextInt(s.length()));
            buff.append(i == 0 ? Character.toUpperCase(c) : c);
            s = "aeiou  ";

            buff.append(s.charAt(rnd.nextInt(s.length())));
        }
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            String s = "bcdfghklmnprstwz";
            char c = s.charAt(rnd.nextInt(s.length()));
            buff.append(i == 0 ? Character.toUpperCase(c) : c);
            s = "aeiou  ";

            buff.append(s.charAt(rnd.nextInt(s.length())));
        }
        return buff.toString();
    }

    private static synchronized int getNextCustomerId() {
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    private void testRandom() {
        int len = getSize(1000, 10000);
        Random random = new Random(10);
        for (int i = 0; i < len; i++) {
            int l = random.nextInt(10);
            String[] sql = new String[l];
            StringBuilder buff = new StringBuilder();
            for (int j = 0; j < l; j++) {
                sql[j] = randomStatement(random);
                buff.append(sql[j]);
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        long v = Integer.MAX_VALUE | ((long) Integer.MAX_VALUE << 31L);
        assertEquals(v, m.interleave(Integer.MAX_VALUE, Integer.MAX_VALUE));
        assertEquals(v, m.interleave(new int[] { Integer.MAX_VALUE, Integer.MAX_VALUE }));
        Random random = new Random(1);
        for (int i = 0; i < 1000; i++) {
            int x = random.nextInt(Integer.MAX_VALUE), y = random.nextInt(Integer.MAX_VALUE);
            v = m.interleave(new int[] {x, y});
            long v2 = m.interleave(x, y);
            assertEquals(v, v2);
            int x1 = m.deinterleave(2, v, 0);
            int y1 = m.deinterleave(2, v, 1);
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        long v = Integer.MAX_VALUE | ((long) Integer.MAX_VALUE << 31L);
        assertEquals(v, m.interleave(Integer.MAX_VALUE, Integer.MAX_VALUE));
        assertEquals(v, m.interleave(new int[] { Integer.MAX_VALUE, Integer.MAX_VALUE }));
        Random random = new Random(1);
        for (int i = 0; i < 1000; i++) {
            int x = random.nextInt(Integer.MAX_VALUE), y = random.nextInt(Integer.MAX_VALUE);
            v = m.interleave(new int[] {x, y});
            long v2 = m.interleave(x, y);
            assertEquals(v, v2);
            int x1 = m.deinterleave(2, v, 0);
            int y1 = m.deinterleave(2, v, 1);
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            int y1 = m.deinterleave(2, v, 1);
            assertEquals(x, x1);
            assertEquals(y, y1);
        }
        for (int i = 0; i < 1000; i++) {
            int x = random.nextInt(1000), y = random.nextInt(1000), z = random.nextInt(1000);
            MultiDimension tool = MultiDimension.getInstance();
            long xyz = tool.interleave(new int[] { x, y, z });
            assertEquals(x, tool.deinterleave(3, xyz, 0));
            assertEquals(y, tool.deinterleave(3, xyz, 1));
            assertEquals(z, tool.deinterleave(3, xyz, 2));
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            int y1 = m.deinterleave(2, v, 1);
            assertEquals(x, x1);
            assertEquals(y, y1);
        }
        for (int i = 0; i < 1000; i++) {
            int x = random.nextInt(1000), y = random.nextInt(1000), z = random.nextInt(1000);
            MultiDimension tool = MultiDimension.getInstance();
            long xyz = tool.interleave(new int[] { x, y, z });
            assertEquals(x, tool.deinterleave(3, xyz, 0));
            assertEquals(y, tool.deinterleave(3, xyz, 1));
            assertEquals(z, tool.deinterleave(3, xyz, 2));
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            int y1 = m.deinterleave(2, v, 1);
            assertEquals(x, x1);
            assertEquals(y, y1);
        }
        for (int i = 0; i < 1000; i++) {
            int x = random.nextInt(1000), y = random.nextInt(1000), z = random.nextInt(1000);
            MultiDimension tool = MultiDimension.getInstance();
            long xyz = tool.interleave(new int[] { x, y, z });
            assertEquals(x, tool.deinterleave(3, xyz, 0));
            assertEquals(y, tool.deinterleave(3, xyz, 1));
            assertEquals(z, tool.deinterleave(3, xyz, 2));
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        PreparedStatement prepMulti = conn.prepareStatement(sql);
        long timeMulti = 0, timeRegular = 0;
        int timeMax = getSize(500, 2000);
        Random rand = new Random(1);
        for (int i = 0; timeMulti < timeMax; i++) {
            int size = rand.nextInt(max / 10);
            int minX = rand.nextInt(max - size);
            int minY = rand.nextInt(max - size);
            int maxX = minX + size, maxY = minY + size;
            time = System.currentTimeMillis();
            ResultSet rs1 = multi.getResult(prepMulti, new int[] { minX, minY }, new int[] { maxX, maxY });
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