Example usage for java.util Random nextFloat

Introduction

In this page you can find the example usage for java.util Random nextFloat.

Prototype

public float nextFloat() 

Source Link

Document

Returns the next pseudorandom, uniformly distributed float value between 0.0 and 1.0 from this random number generator's sequence.

Usage

From source file:url.Domain.java

public String getColor() {

    Random random = new Random();
    final float hue = random.nextFloat() + 0.5f;
    final float saturation = 0.9f;//1.0 for brilliant, 0.0 for dull
    final float luminance = 1.0f; //1.0 for brighter, 0.0 for black*/
    Color color = Color.getHSBColor(hue, saturation, luminance);

    Formatter f = new Formatter(new StringBuffer("#"));
    f.format("%06x", color.getRGB());
    f.toString();/*from w w  w. ja  v  a  2  s .c  om*/
    return f.toString();
}

---

From source file:at.salzburgresearch.kmt.zkconfig.ZookeeperConfigurationTest.java

@Test
public void testFloat() throws Exception {
    Configuration config = new ZookeeperConfiguration(zkConnection, 5000, "/test");

    final String key = UUID.randomUUID().toString();
    final Random random = new Random();
    final float val1 = random.nextFloat();
    final Float val2 = random.nextFloat();

    assertThat(config.getProperty(key), nullValue());

    config.setProperty(key, val1);
    assertEquals(val1, config.getFloat(key), 10e-6);
    assertEquals(new Float(val1), config.getFloat(key, val2));

    config.setProperty(key, val2);
    assertEquals(val2, config.getFloat(key), 10e-6);
    assertEquals(val2, config.getFloat(key, Float.valueOf(val1)));

}

---

From source file:ImageBouncer.java

public ImageBouncer(Image image) {
    previousTimes = new long[128];
    previousTimes[0] = System.currentTimeMillis();
    previousIndex = 1;//from   w w  w . j  a  v  a  2s  .c o m
    previousFilled = false;

    mOriginalImage = image;
    setImageType("TYPE_INT_RGB");

    Random random = new Random();
    mX = random.nextFloat() * 500;
    mY = random.nextFloat() * 500;
    mWidth = image.getWidth(this);
    mHeight = image.getHeight(this);
    mDeltaX = random.nextFloat() * 3;
    mDeltaY = random.nextFloat() * 3;
    // Make sure points are within range.
    addComponentListener(new ComponentAdapter() {
        public void componentResized(ComponentEvent ce) {
            Dimension d = getSize();
            if (mX < 0)
                mX = 0;
            else if (mX + mWidth >= d.width)
                mX = d.width - mWidth - 1;
            if (mY < 0)
                mY = 0;
            else if (mY + mHeight >= d.height)
                mY = d.height - mHeight - 1;
        }
    });
}

---

From source file:com.linkedin.pinot.index.writer.FixedByteWidthRowColDataFileWriterTest.java

@Test
public void testSingleColFloat() throws Exception {

    File wfile = new File("test_single_col_writer.dat");
    wfile.delete();/*from w w w  .ja  v  a2s .  c  o m*/
    final int rows = 100;
    final int cols = 1;
    final int[] columnSizes = new int[] { 4 };
    FixedByteSingleValueMultiColWriter writer = new FixedByteSingleValueMultiColWriter(wfile, rows, cols,
            columnSizes);
    final float[] data = new float[rows];
    Random r = new Random();
    for (int i = 0; i < rows; i++) {
        data[i] = r.nextFloat();
        writer.setFloat(i, 0, data[i]);
    }
    writer.close();

    File rfile = new File("test_single_col_writer.dat");
    PinotDataBuffer buffer = PinotDataBuffer.fromFile(rfile, ReadMode.mmap, FileChannel.MapMode.READ_WRITE,
            "testing");
    FixedByteSingleValueMultiColReader reader = new FixedByteSingleValueMultiColReader(buffer, rows, cols,
            columnSizes);

    for (int i = 0; i < rows; i++) {
        Assert.assertEquals(reader.getFloat(i, 0), data[i]);
    }
    reader.close();
    rfile.delete();
}

---

From source file:cytoscape.render.immed.GraphGraphicsTest.java

private long drawCurrentFull(Random rand) {
    final float nodeSizeFactor = 50f;
    float size = (float) canvasSize;

    long begin = System.nanoTime();
    for (int i = 0; i < numNodes; i++) {
        float x = rand.nextFloat() * (rand.nextBoolean() ? size : -size);
        float y = rand.nextFloat() * (rand.nextBoolean() ? size : -size);
        currentGraphGraphics.drawNodeFull((byte) (i % (int) GraphGraphics.s_last_shape), x, y,
                (x + (rand.nextFloat() * nodeSizeFactor)), (y + (rand.nextFloat() * nodeSizeFactor)),
                Color.blue, 1.0f + (i % 10), Color.yellow);
    }//  ww  w  .  j  a v a2s .c  o m
    long end = System.nanoTime();
    long nodeDur = end - begin;

    BasicStroke edgeStroke = new BasicStroke(1f);

    begin = System.nanoTime();
    for (int i = 0; i < numEdges; i++) {
        currentGraphGraphics.drawEdgeFull((byte) ((i % 7) - 8), rand.nextFloat() * (20f), Color.red,
                (byte) ((i % 7) - 8), rand.nextFloat() * (20f), Color.orange,
                rand.nextFloat() * (rand.nextBoolean() ? size : -size),
                rand.nextFloat() * (rand.nextBoolean() ? size : -size), currentGraphGraphics.m_noAnchors,
                rand.nextFloat() * (rand.nextBoolean() ? size : -size),
                rand.nextFloat() * (rand.nextBoolean() ? size : -size), 1f, edgeStroke, Color.green);
    }
    end = System.nanoTime();
    long duration = (end - begin) + nodeDur;

    //      try {
    //         ImageIO.write(image,"PNG",new File("/tmp/homer-current-" + rand.nextInt(100) + ".png"));
    //      } catch (IOException ioe) { ioe.printStackTrace(); }
    return duration;
}

---

From source file:cytoscape.render.immed.GraphGraphicsTest.java

private long drawOldFull(Random rand) {
    final float nodeSizeFactor = 50f;
    float size = (float) canvasSize;

    long begin = System.nanoTime();
    for (int i = 0; i < numNodes; i++) {
        float x = rand.nextFloat() * (rand.nextBoolean() ? size : -size);
        float y = rand.nextFloat() * (rand.nextBoolean() ? size : -size);
        oldGraphGraphics.drawNodeFull((byte) (i % (int) OldGraphGraphics.s_last_shape), x, y,
                (x + (rand.nextFloat() * nodeSizeFactor)), (y + (rand.nextFloat() * nodeSizeFactor)),
                Color.blue, 1.0f + (i % 10), Color.yellow);
    }/* w w  w .  j av  a 2  s. co m*/
    long end = System.nanoTime();
    long nodeDur = end - begin;

    BasicStroke edgeStroke = new BasicStroke(1f);

    begin = System.nanoTime();
    for (int i = 0; i < numEdges; i++) {
        oldGraphGraphics.drawEdgeFull((byte) ((i % 7) - 8), rand.nextFloat() * (20f), Color.red,
                (byte) ((i % 7) - 8), rand.nextFloat() * (20f), Color.orange,
                rand.nextFloat() * (rand.nextBoolean() ? size : -size),
                rand.nextFloat() * (rand.nextBoolean() ? size : -size), oldGraphGraphics.m_noAnchors,
                rand.nextFloat() * (rand.nextBoolean() ? size : -size),
                rand.nextFloat() * (rand.nextBoolean() ? size : -size), 1f, Color.green, 0f);
    }
    end = System.nanoTime();

    long duration = (end - begin) + nodeDur;

    //      try {
    //         ImageIO.write(image,"PNG",new File("/tmp/homer-old-" + rand.nextInt(100) + ".png"));
    //      } catch (IOException ioe) { ioe.printStackTrace(); }
    return duration;
}

---

From source file:org.cytoscape.graph.render.immed.GraphGraphicsTest.java

private long drawOldFull(Random rand) {
    final float nodeSizeFactor = 50f;
    float size = (float) canvasSize;

    long begin = System.nanoTime();
    for (int i = 0; i < numNodes; i++) {
        float x = rand.nextFloat() * (rand.nextBoolean() ? size : -size);
        float y = rand.nextFloat() * (rand.nextBoolean() ? size : -size);
        oldGraphGraphics.drawNodeFull((byte) (i % (int) OldGraphGraphics.s_last_shape), x, y,
                (x + (rand.nextFloat() * nodeSizeFactor)), (y + (rand.nextFloat() * nodeSizeFactor)),
                Color.blue, 1.0f + (i % 10), Color.yellow);
    }/*from w w  w  . j  a  v a2 s . co m*/
    long end = System.nanoTime();
    long nodeDur = end - begin;

    BasicStroke edgeStroke = new BasicStroke(1f);

    begin = System.nanoTime();
    for (int i = 0; i < numEdges; i++) {
        oldGraphGraphics.drawEdgeFull((byte) ((i % 7) - 8), rand.nextFloat() * (20f), Color.red,
                (byte) ((i % 7) - 8), rand.nextFloat() * (20f), Color.orange,
                rand.nextFloat() * (rand.nextBoolean() ? size : -size),
                rand.nextFloat() * (rand.nextBoolean() ? size : -size), oldGraphGraphics.m_noAnchors,
                rand.nextFloat() * (rand.nextBoolean() ? size : -size),
                rand.nextFloat() * (rand.nextBoolean() ? size : -size), 1f, Color.green, 0f);
    }
    end = System.nanoTime();

    long duration = (end - begin) + nodeDur;
    return duration;
}

---

From source file:org.cytoscape.graph.render.immed.GraphGraphicsTest.java

private long drawCurrentFull(Random rand) {
    final float nodeSizeFactor = 50f;
    float size = (float) canvasSize;

    long begin = System.nanoTime();
    for (int i = 0; i < numNodes; i++) {
        float x = rand.nextFloat() * (rand.nextBoolean() ? size : -size);
        float y = rand.nextFloat() * (rand.nextBoolean() ? size : -size);
        currentGraphGraphics.drawNodeFull((byte) (i % (int) GraphGraphics.s_last_shape), x, y,
                (x + (rand.nextFloat() * nodeSizeFactor)), (y + (rand.nextFloat() * nodeSizeFactor)),
                Color.blue, 1.0f + (i % 10), null, Color.yellow);
    }/*from   w  w w . ja  v a  2s  . co  m*/
    long end = System.nanoTime();
    long nodeDur = end - begin;

    BasicStroke edgeStroke = new BasicStroke(1f);

    begin = System.nanoTime();
    for (int i = 0; i < numEdges; i++) {
        currentGraphGraphics.drawEdgeFull((byte) ((i % 7) - 8), rand.nextFloat() * (20f), Color.red,
                (byte) ((i % 7) - 8), rand.nextFloat() * (20f), Color.orange,
                rand.nextFloat() * (rand.nextBoolean() ? size : -size),
                rand.nextFloat() * (rand.nextBoolean() ? size : -size), currentGraphGraphics.m_noAnchors,
                rand.nextFloat() * (rand.nextBoolean() ? size : -size),
                rand.nextFloat() * (rand.nextBoolean() ? size : -size), 1f, edgeStroke, Color.green);
    }
    end = System.nanoTime();
    long duration = (end - begin) + nodeDur;

    //      try {
    //         ImageIO.write(image,"PNG",new File("/tmp/homer-current-" + rand.nextInt(100) + ".png"));
    //      } catch (IOException ioe) { ioe.printStackTrace(); }
    return duration;
}

---

From source file:Bouncer.java

public Bouncer() {
    previousTimes = new long[128];
    previousTimes[0] = System.currentTimeMillis();
    previousIndex = 1;/*from  www  .j av  a 2 s. c o  m*/
    previousFilled = false;

    mN = 38;
    mPoints = new float[mN];
    mDeltas = new float[mN];
    Random random = new Random();
    for (int i = 0; i < mN; i++) {
        mPoints[i] = random.nextFloat() * 500;
        mDeltas[i] = random.nextFloat() * 3;
    }

    addComponentListener(new ComponentAdapter() {
        public void componentResized(ComponentEvent ce) {
            Dimension d = getSize();
            for (int i = 0; i < mN; i++) {
                int limit = ((i % 2) == 0) ? d.width : d.height;
                if (mPoints[i] < 0)
                    mPoints[i] = 0;
                else if (mPoints[i] >= limit)
                    mPoints[i] = limit - 1;
            }
        }
    });
}

---

From source file:TextBouncer.java

public TextBouncer(String s, Font f) {
    previousTimes = new long[128];
    previousTimes[0] = System.currentTimeMillis();
    previousIndex = 1;/* w ww.  j  ava 2 s.c o m*/
    previousFilled = false;

    mString = s;
    setFont(f);
    Random random = new Random();
    mX = random.nextFloat() * 500;
    mY = random.nextFloat() * 500;
    mDeltaX = random.nextFloat() * 3;
    mDeltaY = random.nextFloat() * 3;
    mShearX = random.nextFloat() / 2;
    mShearY = random.nextFloat() / 2;
    mShearDeltaX = mShearDeltaY = .05f;
    FontRenderContext frc = new FontRenderContext(null, true, false);
    Rectangle2D bounds = getFont().getStringBounds(mString, frc);
    mWidth = (float) bounds.getWidth();
    mHeight = (float) bounds.getHeight();
    // Make sure points are within range.
    addComponentListener(new ComponentAdapter() {
        public void componentResized(ComponentEvent ce) {
            Dimension d = getSize();
            if (mX < 0)
                mX = 0;
            else if (mX + mWidth >= d.width)
                mX = d.width - mWidth - 1;
            if (mY < 0)
                mY = 0;
            else if (mY + mHeight >= d.height)
                mY = d.height - mHeight - 1;
        }
    });
}

---

• «
• 1
• 2
• 3
• 4
• 5
• 6
• 7
• 8
• 9
• 10
• 11
• 12
• 13
• 14
• »