How to use switch statement that involves instantiation in cases?
.everyoneloves__top-leaderboard:empty,.everyoneloves__mid-leaderboard:empty,.everyoneloves__bot-mid-leaderboard:empty{ height:90px;width:728px;box-sizing:border-box;
}
I have an instance variable piece that is of type Object. It is instantiated as one of several classes in my program as a part of a switch statement as follows:
public Object getRandomPiece() {
int random = (int)(Math.random()*8);
switch(random) {
case 0: case 1:
_piece = new Piece1();
}
return _piece;
}
Note that there are multiple cases, I have just summarized it in this snippet. My problem is that after giving _piece its value from the switch statement and returning it, I cannot access any of its new class's methods (example, methods from class Piece1). How should I approach this?
java switch-statement
edited Nov 17 '18 at 3:18
John Kugelman
249k54407460
asked Nov 17 '18 at 3:13
JabrahJabrah
21
add a comment |
I have an instance variable piece that is of type Object. It is instantiated as one of several classes in my program as a part of a switch statement as follows:
public Object getRandomPiece() {
int random = (int)(Math.random()*8);
switch(random) {
case 0: case 1:
_piece = new Piece1();
}
return _piece;
}
Note that there are multiple cases, I have just summarized it in this snippet. My problem is that after giving _piece its value from the switch statement and returning it, I cannot access any of its new class's methods (example, methods from class Piece1). How should I approach this?
java switch-statement
edited Nov 17 '18 at 3:18
John Kugelman
249k54407460
asked Nov 17 '18 at 3:13
JabrahJabrah
21
3
Program to a commonPieceinterface. Also, you could justreturn new Piece1();
– Elliott Frisch
Nov 17 '18 at 3:15
add a comment |
I have an instance variable piece that is of type Object. It is instantiated as one of several classes in my program as a part of a switch statement as follows:
public Object getRandomPiece() {
int random = (int)(Math.random()*8);
switch(random) {
case 0: case 1:
_piece = new Piece1();
}
return _piece;
}
Note that there are multiple cases, I have just summarized it in this snippet. My problem is that after giving _piece its value from the switch statement and returning it, I cannot access any of its new class's methods (example, methods from class Piece1). How should I approach this?
java switch-statement
edited Nov 17 '18 at 3:18
John Kugelman
249k54407460
asked Nov 17 '18 at 3:13
JabrahJabrah
21
I have an instance variable piece that is of type Object. It is instantiated as one of several classes in my program as a part of a switch statement as follows:
public Object getRandomPiece() {
int random = (int)(Math.random()*8);
switch(random) {
case 0: case 1:
_piece = new Piece1();
}
return _piece;
}
Note that there are multiple cases, I have just summarized it in this snippet. My problem is that after giving _piece its value from the switch statement and returning it, I cannot access any of its new class's methods (example, methods from class Piece1). How should I approach this?
java switch-statement
java switch-statement
edited Nov 17 '18 at 3:18
John Kugelman
249k54407460
asked Nov 17 '18 at 3:13
JabrahJabrah
21
edited Nov 17 '18 at 3:18
John Kugelman
249k54407460
asked Nov 17 '18 at 3:13
JabrahJabrah
21
edited Nov 17 '18 at 3:18
John Kugelman
249k54407460
edited Nov 17 '18 at 3:18
John Kugelman
249k54407460
edited Nov 17 '18 at 3:18
John Kugelman
249k54407460
249k54407460
asked Nov 17 '18 at 3:13
JabrahJabrah
21
asked Nov 17 '18 at 3:13
JabrahJabrah
21
asked Nov 17 '18 at 3:13
JabrahJabrah
21
21
3
Program to a commonPieceinterface. Also, you could justreturn new Piece1();
– Elliott Frisch
Nov 17 '18 at 3:15
add a comment |
3
Program to a commonPieceinterface. Also, you could justreturn new Piece1();
– Elliott Frisch
Nov 17 '18 at 3:15
3
3
Program to a common
Piece interface. Also, you could just return new Piece1();– Elliott Frisch
Nov 17 '18 at 3:15
Program to a common
Piece interface. Also, you could just return new Piece1();– Elliott Frisch
Nov 17 '18 at 3:15
add a comment |
1 Answer
1
active
oldest
votes
Program to a common Piece interface. If you don't use object state, prefer to make your method static. I would prefer a ThreadLocalRandom over Math.random(), and I would prefer to avoid unnecessary local temporary variables. Putting that together, it might look something like
public static Piece getRandomPiece() {
switch (ThreadLocalRandom.current().nextInt(8)) {
case 0: case 1:
return new Piece1();
}
return null;
}
answered Nov 17 '18 at 3:29
Elliott FrischElliott Frisch
157k1397192
add a comment |
Your Answer
StackExchange.ifUsing("editor", function () {
StackExchange.using("externalEditor", function () {
StackExchange.using("snippets", function () {
StackExchange.snippets.init();
});
});
}, "code-snippets");
StackExchange.ready(function() {
var channelOptions = {
tags: "".split(" "),
id: "1"
};
initTagRenderer("".split(" "), "".split(" "), channelOptions);
StackExchange.using("externalEditor", function() {
// Have to fire editor after snippets, if snippets enabled
if (StackExchange.settings.snippets.snippetsEnabled) {
StackExchange.using("snippets", function() {
createEditor();
});
}
else {
createEditor();
}
});
function createEditor() {
StackExchange.prepareEditor({
heartbeatType: 'answer',
autoActivateHeartbeat: false,
convertImagesToLinks: true,
noModals: true,
showLowRepImageUploadWarning: true,
reputationToPostImages: 10,
bindNavPrevention: true,
postfix: "",
imageUploader: {
brandingHtml: "Powered by u003ca class="icon-imgur-white" href="https://imgur.com/"u003eu003c/au003e",
contentPolicyHtml: "User contributions licensed under u003ca href="https://creativecommons.org/licenses/by-sa/3.0/"u003ecc by-sa 3.0 with attribution requiredu003c/au003e u003ca href="https://stackoverflow.com/legal/content-policy"u003e(content policy)u003c/au003e",
allowUrls: true
},
onDemand: true,
discardSelector: ".discard-answer"
,immediatelyShowMarkdownHelp:true
});
}
});
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
StackExchange.ready(
function () {
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fstackoverflow.com%2fquestions%2f53347856%2fhow-to-use-switch-statement-that-involves-instantiation-in-cases%23new-answer', 'question_page');
}
);
Post as a guest
Required, but never shown
1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
Program to a common Piece interface. If you don't use object state, prefer to make your method static. I would prefer a ThreadLocalRandom over Math.random(), and I would prefer to avoid unnecessary local temporary variables. Putting that together, it might look something like
public static Piece getRandomPiece() {
switch (ThreadLocalRandom.current().nextInt(8)) {
case 0: case 1:
return new Piece1();
}
return null;
}
answered Nov 17 '18 at 3:29
Elliott FrischElliott Frisch
157k1397192
add a comment |
Program to a common Piece interface. If you don't use object state, prefer to make your method static. I would prefer a ThreadLocalRandom over Math.random(), and I would prefer to avoid unnecessary local temporary variables. Putting that together, it might look something like
public static Piece getRandomPiece() {
switch (ThreadLocalRandom.current().nextInt(8)) {
case 0: case 1:
return new Piece1();
}
return null;
}
answered Nov 17 '18 at 3:29
Elliott FrischElliott Frisch
157k1397192
add a comment |
Program to a common Piece interface. If you don't use object state, prefer to make your method static. I would prefer a ThreadLocalRandom over Math.random(), and I would prefer to avoid unnecessary local temporary variables. Putting that together, it might look something like
public static Piece getRandomPiece() {
switch (ThreadLocalRandom.current().nextInt(8)) {
case 0: case 1:
return new Piece1();
}
return null;
}
answered Nov 17 '18 at 3:29
Elliott FrischElliott Frisch
157k1397192
Program to a common Piece interface. If you don't use object state, prefer to make your method static. I would prefer a ThreadLocalRandom over Math.random(), and I would prefer to avoid unnecessary local temporary variables. Putting that together, it might look something like
public static Piece getRandomPiece() {
switch (ThreadLocalRandom.current().nextInt(8)) {
case 0: case 1:
return new Piece1();
}
return null;
}
answered Nov 17 '18 at 3:29
Elliott FrischElliott Frisch
157k1397192
answered Nov 17 '18 at 3:29
Elliott FrischElliott Frisch
157k1397192
answered Nov 17 '18 at 3:29
Elliott FrischElliott Frisch
157k1397192
answered Nov 17 '18 at 3:29
Elliott FrischElliott Frisch
157k1397192
157k1397192
add a comment |
add a comment |
Thanks for contributing an answer to Stack Overflow!
- Please be sure to answer the question. Provide details and share your research!
But avoid …
- Asking for help, clarification, or responding to other answers.
- Making statements based on opinion; back them up with references or personal experience.
To learn more, see our tips on writing great answers.
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
StackExchange.ready(
function () {
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fstackoverflow.com%2fquestions%2f53347856%2fhow-to-use-switch-statement-that-involves-instantiation-in-cases%23new-answer', 'question_page');
}
);
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
3
Program to a common
Pieceinterface. Also, you could justreturn new Piece1();– Elliott Frisch
Nov 17 '18 at 3:15