/**
* Look for ConstantDouble in ConstantPool.
*
* @param n Double number to look for
* @return index on success, -1 otherwise
*/
public int lookupDouble(double n) {
long bits = Double.doubleToLongBits(n);
for (int i = 1; i < index; i++) {
if (constants[i] instanceof ConstantDouble) {
ConstantDouble c = (ConstantDouble) constants[i];
if (Double.doubleToLongBits(c.getBytes()) == bits) return i;
}
}
return -1;
}