Okay, I need to be able to call a method and toggle a boolean value so that the return is different every time I need to be able to call the method 9 time's and each time switch between returning X, O, X, O, X, O, X, O, X
public class XOChecker {
char rX = 'X';
char rO = 'O';
char rXO;
boolean t = true;
public char setXO() {
if (t==true) {
rXO = rX;
} else if (t==false) {
rXO = rO;
}
return rXO;
}
}
how about:
return (t = !t) ? rO : rX;
// ^ invert t every time
// ^ t changes every time, so the return value changes every time
the following code:
public class XOChecker {
char rX = 'X';
char rO = 'O';
boolean t = true;
public char setXO() {
return (t = !t) ? rX : rO;
}
public static void main(String [] args) {
XOChecker xo = new XOChecker();
for (int i = 0; i < 100 ; ++i) {
System.out.print(xo.setXO());
}
}
}
outputs:
OXOXOXOXOXOXOXOXOXOXOXOXOXOXOXOXOXOXOXOXOXOXOXOXOXOXOXOXOXOXOXOXOXOXOXOXOXOXOXOXOXOXOXOXOXOXOXOXOXOX
public class XOChecker {
char xo = 'O';
public char setXO(){
xo = (xo=='O')?'X':'O';
return xo;
}
}
Alternatively: xo = (char)('X'-xo+'O');
And finally: xo^='X'^'O';
Or shorter:
public char setXO(){
return xo^=23;
}
t = !t;
if(t) {
return rX;
} else {
return rO;
}
BTW, the name of the method is misleading. It should be getSomething
, not setSomething
, based on what it does.
The problem with your attempt is :
You are not changing value of t, after calling the method. Also else if (t==false) is equivalent to else
You have the change the value of t each time you call the method. Something like :
if(t)
{
t = false;
return rX;
}
else
{
t = true;
return rO;
}
Declare constants as static final
(or get rid of them completely).
Declare everything used only internally private
.
Unlike other replies, don't do assignment inside expressions.
Use more meaningful names.
Here goes:
public class XOChecker
{
private static final char REPLY_TRUE = 'X';
private static final char REPLY_FALSE = 'O';
private boolean t = true;
public char toggle()
{
final char result = t ? REPLY_TRUE : REPLY_FALSE;
t = !t;
return result;
}
}
The technical post webpages of this site follow the CC BY-SA 4.0 protocol. If you need to reprint, please indicate the site URL or the original address.Any question please contact:yoyou2525@163.com.