Mario: Die Seite wurde neu angelegt: „Lösung: (kompilierbar in nur einer Datei ...)

 import java.io.BufferedReader; import java.io.IOException; import java.io.InputStreamReader;  /**  * Base Cl…“

2011-03-11T00:07:49Z

Die Seite wurde neu angelegt: „Lösung: (kompilierbar in nur einer Datei ...) <pre> import java.io.BufferedReader; import java.io.IOException; import java.io.InputStreamReader; /** * Base Cl…“

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Lösung: (kompilierbar in nur einer Datei ...)

<pre>
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

/**
* Base Class for all states
*/
class State {
// ! returns a new state, if transition is correct
public State transition(String signal) {
return this;
}
}

/**
* First class to be used in this state chart
*/
class InitialState extends State {
// ! returns a new state, if transition is correct
@Override
public State transition(String signal) {
if (signal.equals("start")) {
return new StartedState();
} else {
System.out.println("!! signal \"" + signal + "\" not found !!");
return this;
}
}
}

/**
* First class to be used in this state chart
*/
class StartedState extends State {
// ! returns a new state, if transition is correct
@Override
public State transition(String signal) {
if (signal.equals("end")) {
return new InitialState();
} else if (signal.equals("exit")) {
return null;
} else {
System.out.println("!! signal \"" + signal + "\" not found !!");
return this;
}
}
}

/**
* Class file starting main loop
*/
public class StateCharts {
/**
* Main class, creating the state chart
*
* @param args
* @throws IOException
*/
public static void main(String[] args) throws IOException {
// set the state chart to be initial at state initial
State current_state = new InitialState();

// loop through the state till exit is reached
while (current_state != null) {
// print information about current class
System.out.println("Current state: "
+ current_state.getClass().getName());

// get signal for next state
System.out.print("signal to be send: ");
InputStreamReader input = new InputStreamReader(System.in);
BufferedReader reader = new BufferedReader(input);
String signal = reader.readLine();

// get next state if needed
current_state = current_state.transition(signal);
System.out.println();
}

// inform user
System.out.println("StateChart is at end state.");
}
}
</pre>

Javakurs/Übungsaufgaben/OOPStateCharts/Musterloesung - Versionsgeschichte

Mario: Die Seite wurde neu angelegt: „Lösung: (kompilierbar in nur einer Datei ...)
import java.io.BufferedReader; import java.io.IOException; import java.io.InputStreamReader; /** * Base Cl…“