android/guava/src/com/google/common/primitives/Floats.java
public static int indexOf(float[] array, float[] target) {
    checkNotNull(array, "array");
    checkNotNull(target, "target");
    if (target.length == 0) {
      return 0;
    }

    outer:
    for (int i = 0; i < array.length - target.length + 1; i++) {
      for (int j = 0; j < target.length; j++) {
        if (array[i + j] != target[j]) {
          continue outer;
        }
      }
      return i;
    }
    return -1;
  }
public static int indexOf(float[] array, float[] target) {
    checkNotNull(array, "array");
    checkNotNull(target, "target");
    if (target.length == 0) {
      return 0;
    }

    outer:
    for (int i = 0; i < array.length - target.length + 1; i++) {
      for (int j = 0; j < target.length; j++) {
        if (array[i + j] != target[j]) {
          continue outer;
        }
      }
      return i;
    }
    return -1;
  }
Returns the start position of the first occurrence of the specified {@code target} within
{@code array}, or {@code -1} if there is no such occurrence.

<p>More formally, returns the lowest index {@code i} such that {@code Arrays.copyOfRange(array,
i, i + target.length)} contains exactly the same elements as {@code target}.

<p>Note that this always returns {@code -1} when {@code target} contains {@code NaN}.

@param array the array to search for the sequence {@code target}
@param target the array to search for as a sub-sequence of {@code array}