ODEFixedStepHandler (Hipparchus::Ordinary Differential Equations 4.0.2 API)

```
public interface ODEFixedStepHandler
```
This interface represents a handler that should be called after each successful fixed step.
This interface should be implemented by anyone who is interested in getting the solution of an ordinary differential equation at fixed time steps. Objects implementing this interface should be wrapped within an instance of StepNormalizer that itself is used as the general ODEStepHandler by the integrator. The StepNormalizer object is called according to the integrator internal algorithms and it calls objects implementing this interface as necessary at fixed time steps.

See Also:

ODEStepHandler, StepNormalizer

Method Summary

All Methods Instance Methods Abstract Methods Default Methods
Modifier and Type	Method	Description
`void`	`handleStep(ODEStateAndDerivative state, boolean isLast)`	Handle the last accepted step
`default void`	`init(ODEStateAndDerivative initialState, double finalTime)`	Initialize step handler at the start of an ODE integration.

- Method Detail
  - init
```
default void init(ODEStateAndDerivative initialState,
                  double finalTime)
```
    Initialize step handler at the start of an ODE integration.
    This method is called once at the start of the integration. It may be used by the step handler to initialize some internal data if needed.
    
    The default implementation does nothing.
    
    Parameters:
    
    initialState - initial time, state vector and derivative
    
    finalTime - target time for the integration
  - handleStep
```
void handleStep(ODEStateAndDerivative state,
                boolean isLast)
```
    Handle the last accepted step
    
    Parameters:
    
    state - current state
    
    isLast - true if the step is the last one