List of nextFloat() Examples

Examples of nextFloat()

it.unimi.dsi.fastutil.floats.FloatIterator.nextFloat()
java.security.SecureRandom.nextFloat()
java.util.Random.nextFloat()
Returns the next pseudorandom, uniformly distributed {@code float}value between {@code 0.0} and {@code 1.0} from this randomnumber generator's sequence.
The general contract of {@code nextFloat} is that one{@code float} value, chosen (approximately) uniformly from therange {@code 0.0f} (inclusive) to {@code 1.0f} (exclusive), ispseudorandomly generated and returned. All 2²⁴ possible {@code float} valuesof the form m x 2^-24, where m is a positive integer less than 2²⁴ , are produced with (approximately) equal probability.
The method {@code nextFloat} is implemented by class {@code Random}as if by:
```
  {@code}public float nextFloat()  return next(24) / ((float)(1 << 24)); }}
```
The hedge "approximately" is used in the foregoing description only because the next method is only approximately an unbiased source of independently chosen bits. If it were a perfect source of randomly chosen bits, then the algorithm shown would choose {@code float}values from the stated range with perfect uniformity.
[In early versions of Java, the result was incorrectly calculated as:
```
  {@code return next(30) / ((float)(1 << 30));}
```
This might seem to be equivalent, if not better, but in fact it introduced a slight nonuniformity because of the bias in the rounding of floating-point numbers: it was slightly more likely that the low-order bit of the significand would be 0 than that it would be 1.] @return the next pseudorandom, uniformly distributed {@code float}value between {@code 0.0} and {@code 1.0} from thisrandom number generator's sequence
java.util.Scanner.nextFloat()
Scans the next token of the input as a float. This method will throw InputMismatchException if the next token cannot be translated into a valid float value as described below. If the translation is successful, the scanner advances past the input that matched.
If the next token matches the Float regular expression defined above then the token is converted into a float value as if by removing all locale specific prefixes, group separators, and locale specific suffixes, then mapping non-ASCII digits into ASCII digits via {@link Character#digit Character.digit}, prepending a negative sign (-) if the locale specific negative prefixes and suffixes were present, and passing the resulting string to {@link Float#parseFloat Float.parseFloat}. If the token matches the localized NaN or infinity strings, then either "Nan" or "Infinity" is passed to {@link Float#parseFloat(String) Float.parseFloat} as appropriate. @return the float scanned from the input @throws InputMismatchException if the next token does not match the Float regular expression, or is out of range @throws NoSuchElementException if input is exhausted @throws IllegalStateException if this scanner is closed
org.apache.commons.math3.random.RandomGenerator.nextFloat()
Returns the next pseudorandom, uniformly distributed float value between 0.0 and 1.0 from this random number generator's sequence. @return the next pseudorandom, uniformly distributed floatvalue between 0.0 and 1.0 from this random number generator's sequence
org.jamesii.core.math.random.generators.IRandom.nextFloat()
Returns a uniformly distributed {@code float} value between 0.0 (inclusive)and 1.0 (exclusive). @return A (pseudo-)random single-precision floating point value in theinterval [0, 1).
org.terasology.utilities.random.FastRandom.nextFloat()
prefuse.util.collections.LiteralIterator.nextFloat()
ucar.ma2.Array.nextFloat()
Return the next float in the local iterator. Uses the local iterator, which is not thread-safe. Use getIndexIterator if you need thread-safety. @return next element as a float, same as IndexIterator.getFloatNext().

Examples of java.util.Random.nextFloat()

      arr = new MutableSparseFloatArray(new float[orig.length]);
      int[] idxs = new int[1024*1024];
      float[] vals = new float[idxs.length];
      for (int i = 0; i < idxs.length; i++) {
        idxs[i] = r.nextInt(orig.length);
        vals[i] = r.nextFloat();
      }
      
      long markTime = System.currentTimeMillis();
      for (int i = 0; i < idxs.length; i++) {
        orig[i] = vals[i];

View Full Code Here

Examples of java.util.Random.nextFloat()

    try {
      float[] orig = new float[32*1024*1024];
      float density = 0.4f;
      Random rand = new Random(SEED);
      int idx = 0;
      while (rand.nextFloat() > density) {
        idx++;
      }
      int count = 0;
      while (idx < orig.length) {
        orig[idx] = rand.nextFloat();

View Full Code Here

Examples of java.util.Random.nextFloat()

      while (rand.nextFloat() > density) {
        idx++;
      }
      int count = 0;
      while (idx < orig.length) {
        orig[idx] = rand.nextFloat();
        count++;
        idx += 1;
        while (rand.nextDouble() > density) {
          idx++;
        }

View Full Code Here

Examples of java.util.Random.nextFloat()


  public void testGlobalBB() {
    Random rand = new Random(System.currentTimeMillis());
    int count = 0;
    while(count++ <1000) {
      double r = 360.*rand.nextFloat()-180;
      LatLonRect llbb = new LatLonRect(new LatLonPointImpl(20.0, r), 20.0, 360.0);
      double r2 = 360.*rand.nextFloat()-180;
      LatLonPointImpl p = new LatLonPointImpl(30.0, r2);
      assert llbb.contains(p);
    }

View Full Code Here

Examples of java.util.Random.nextFloat()

    Random rand = new Random(System.currentTimeMillis());
    int count = 0;
    while(count++ <1000) {
      double r = 360.*rand.nextFloat()-180;
      LatLonRect llbb = new LatLonRect(new LatLonPointImpl(20.0, r), 20.0, 360.0);
      double r2 = 360.*rand.nextFloat()-180;
      LatLonPointImpl p = new LatLonPointImpl(30.0, r2);
      assert llbb.contains(p);
    }
  }

View Full Code Here

Examples of java.util.Random.nextFloat()

    DataOutputStream dout = new DataOutputStream(out);


    Random r = new Random();
    long start = System.currentTimeMillis();
    for (int i=0; i<(1000*1000);i++) {
      dout.writeFloat(r.nextFloat());
    }
    dout.flush();
    fout.close();
    double took = .001 * (System.currentTimeMillis() - start);
    File f = new File(filenameOut);

View Full Code Here

Examples of java.util.Random.nextFloat()

    DataOutputStream dout = new DataOutputStream(out);


    Random r = new Random();
    long start = System.currentTimeMillis();
    for (int i=0; i<(1000*1000);i++) {
      dout.writeFloat(r.nextFloat());
    }
    fout.flush();
    fout.close();
    double took = .001 * (System.currentTimeMillis() - start);
    File f = new File(filenameOut);

View Full Code Here

Examples of java.util.Random.nextFloat()

            });


        Value map = ValueFactory.mapValue(new Value[] {
                ValueFactory.integerValue(0), ValueFactory.integerValue(Integer.MIN_VALUE),
                ValueFactory.integerValue(rand.nextInt()), ValueFactory.integerValue(Integer.MAX_VALUE),
                ValueFactory.floatValue(rand.nextFloat()), ValueFactory.booleanValue(true),
                ValueFactory.floatValue(rand.nextDouble()), ValueFactory.nilValue(),
            });


        List<Value> values = new ArrayList<Value>();

View Full Code Here

Examples of java.util.Random.nextFloat()

  testFloat(Float.NaN);
  testFloat(Float.NEGATIVE_INFINITY);
  testFloat(Float.POSITIVE_INFINITY);
  Random rand = new Random();
  for (int i = 0; i < 1000; i++) {
      testFloat(rand.nextFloat());
  }
    }


    public void testFloat(float v) throws Exception {
    }

View Full Code Here

Examples of java.util.Random.nextFloat()

  testFloatArray(new float[] { Float.POSITIVE_INFINITY });
  testFloatArray(new float[] { Float.MAX_VALUE, Float.MIN_VALUE, Float.NaN, Float.NEGATIVE_INFINITY, Float.POSITIVE_INFINITY });
  Random rand = new Random();
  float[] v = new float[100];
  for (int i = 0; i < v.length; ++i) {
      v[i] = rand.nextFloat();
  }
  testFloatArray(v);
    }


    public void testFloatArray(float[] v) throws Exception {

View Full Code Here

0 1 2 3 4 5

TOP

All source code are property of their respective owners. Java is a trademark of Sun Microsystems, Inc and owned by ORACLE Inc. Contact coftware#gmail.com.