How can I make the object array named rooms accessible to the static method at the end called retrieveRoom(); I tryed public static Rooms rooms[] = new Rooms[3]. But I am just getting errors from that. Any help is appreciated.
public class MasterControlPanel{
public static void main(String[] args){
Rooms rooms[] = new Rooms[3];
rooms[0] = new Rooms("Room U", 1, 4, 4);
rooms[1] = new Rooms("Room U", 2, 4, 4);
rooms[2] = new Rooms("Connector X", 3, 2, 4);
rooms[3] = new Rooms("Connector U", 4, 2, 4);
for(int x = 0; x <= rooms.length; x++){
rooms[x].createLights();
rooms[x].createWalls();
}
}
public static Object retrieveRoom(int connectedRoom){
connectedRoom -= 1;
return rooms[connectedRoom];
}
}
Move
public static Rooms[] rooms = new Rooms[4];
out of your main()
method, to the declarations section like this
public class MasterControlPanel {
public static Rooms[] rooms = new Rooms[4];
public static void main(String[] args) {
...
}
}
This will define a rooms
static member in your MasterControlPanel
class.
Here are some other tips:
Class
exists. However, in order to access instance members (variables which belong to an instance of that class) you need an instance of the class. Rooms[] rooms = new Rooms[4];
. Notice that array brackets are moved to Type
part, this will prevent confusion in future. " Let's define An Array of Rooms with the name rooms ". This is not required however a good thing to do. rooms
array with the size of 3 however you are adding 4 elements to it. This will cause ArrayIndexOutOfBounds
exception. private
to achieve Encapsulation . You can provide public
or protected
methods to retrieve those private
members from out of your class. n
elements, maximum number of consecutive iterations that you can make on that array is also n
that's for sure. That means in a for
loop make sure that your loop condition is n-1
for the last iteration. Remember, there is no 4
th element in a size 4
array. Here follows the code
public class MasterControlPanel {
public static Room[] rooms = new Room[4];
public static void main(String[] args) {
rooms[0] = new Room("Room U", 1, 4, 4);
rooms[1] = new Room("Room U", 2, 4, 4);
rooms[2] = new Room("Connector X", 3, 2, 4);
rooms[3] = new Room("Connector U", 4, 2, 4);
for (int x = 0; x <= rooms.length-1; x++) {
rooms[x].createLights();
rooms[x].createWalls();
}
}
public static Room retrieveRoom(int connectedRoom) {
connectedRoom -= 1;
return rooms[connectedRoom];
}
}
class Room {
// These are instance members for Room class
private String roomString;
private int roomInteger1, roomInteger2, roomInteger3;
public Room(String string, int integer1, int integer2, int integer3) {
// This is the constructor for Room object
this.roomString = string;
this.roomInteger1 = integer1;
this.roomInteger2 = integer2;
this.roomInteger3 = integer3;
}
public void createLights() {
// This method creates lights
}
public void createWalls() {
// This method creates walls
}
// These are Getters and Setters for Room members
public String getRoomString() {
return roomString;
}
public void setRoomString(String roomString) {
this.roomString = roomString;
}
public int getRoomInteger1() {
return roomInteger1;
}
public void setRoomInteger1(int roomInteger1) {
this.roomInteger1 = roomInteger1;
}
public int getRoomInteger2() {
return roomInteger2;
}
public void setRoomInteger2(int roomInteger2) {
this.roomInteger2 = roomInteger2;
}
public int getRoomInteger3() {
return roomInteger3;
}
public void setRoomInteger3(int roomInteger3) {
this.roomInteger3 = roomInteger3;
}
}
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