Hello, need help with this exercise in JAVA. We need to use the STATE DESIGN PATTERN. GIVEN CODE: public class Pizza { public final static int COOKED = 0; public final static int BAKED = 1; public final static int DELIVERED = 2; int state = COOKED; public int getState() {return state; } public void setState(int state) {this.state = state; } public void bake() throws Exception { if(state == COOKED) { System.out.print("Baking the pizza..."); state = BAKED; } else if(state == BAKED) { throw new Exception("Can't bake a pizza already baked"); } else if(state == DELIVERED) { throw new Exception("Can't bake a pizza already delivered");} } public void deliver() throws Exception { if(state == COOKED) { throw new Exception("Can't deliver a pizza not baked yet"); } else if(state == BAKED) { System.out.print("Delivering the pizza..."); state = DELIVERED; } else if(state == DELIVERED) { throw new Exception("Can't deliver a pizza already delivered"); } } } EXERCISE: Refactor the pizza class using the state pattern. It could help if you draw a state machine for the transitions between states. In certain cases, a pizza's becomes undeliverable and will be eaten by the kitchen staff. Add this state to your solution
Hello, need help with this exercise in JAVA. We need to use the STATE DESIGN PATTERN.
GIVEN CODE:
public class Pizza {
public final static int COOKED = 0;
public final static int BAKED = 1;
public final static int DELIVERED = 2;
int state = COOKED;
public int getState() {return state; }
public void setState(int state) {this.state = state; }
public void bake() throws Exception {
if(state == COOKED) {
System.out.print("Baking the pizza...");
state = BAKED; }
else if(state == BAKED) {
throw new Exception("Can't bake a pizza already baked"); }
else if(state == DELIVERED) {
throw new Exception("Can't bake a pizza already delivered");}
}
public void deliver() throws Exception {
if(state == COOKED) {
throw new Exception("Can't deliver a pizza not baked yet");
}
else if(state == BAKED) {
System.out.print("Delivering the pizza...");
state = DELIVERED; }
else if(state == DELIVERED) {
throw new Exception("Can't deliver a pizza already delivered"); }
}
}
EXERCISE: Refactor the pizza class using the state pattern. It could help if you draw a state machine for the transitions between states. In certain cases, a pizza's becomes undeliverable and will be eaten by the kitchen staff. Add this state to your solution.
Trending now
This is a popular solution!
Step by step
Solved in 2 steps with 1 images
