prob35Task

 abstract class Task {
     protected int timpExecutie;

    public int execute(){
        return timpExecutie;
    }
    public abstract String toString();
 }
public class SimpleTask extends Task {

    SimpleTask(int timpEx){
        this.timpExecutie = timpEx;
    }

    @Override
    public String toString() {
        // TODO Auto-generated method stub
        return "Simple Task(" + this.timpExecutie + ")";
    }
    public void ChangeTime(int new_time){
        this.timpExecutie = new_time;
    }
}
public class ConditionalTask extends Task {
    private Task unu;
    private Task doi;

    ConditionalTask(Task unu, Task doi){
        this.unu = unu;
        this.doi = doi;
        int tmp = (int)Math.round(Math.random());
        this.timpExecutie = 5 + tmp*unu.execute() + (1 - tmp)*doi.execute();
    }
public int getTask(){
    return 2;
}
    @Override
    public String toString() {
        return "Contitional Task("+ unu +"," + doi + ")";
    }

}
public class BlockTask extends Task {

    private Task[] task = new Task[32];
    private int nrTask;

    public void insert(Task new_task){
        if (nrTask == task.length){ // marim tabloul
            Task[] newTask = new Task[nrTask * 2];
            for(int i = 0; i < nrTask; i++){
                newTask[i] = task[i];
            }
            task = newTask; //setem referinta
        }
        task[nrTask] = new_task; //adaugam
        nrTask++;

        this.timpExecutie += new_task.execute();//iserez unu ii cresc timpul de executie
    }
    public int getNrTask(){
        return nrTask;
    }
    @Override
    public String toString() {
     String s = "BlockTask(";
     for (int i = 0; i < nrTask; i++){
         s += task[i] +",";
     }
     s = s.substring(0, s.length()-1);
     return s + ")";
    }
}
public class Main {

    public static void main(String[] args) {
        SimpleTask s = new SimpleTask(165);
        BlockTask b = new BlockTask();
        b.insert(new SimpleTask(5));
        b.insert(new SimpleTask(4));
        ConditionalTask c = new ConditionalTask(s, b);
        System.out.println(c);
        System.out.println(c.getTask());
        System.out.println(b.getNrTask());

    }

}