此方法必须返回 boolean 类型的结果,java [英] this method must return a result of type boolean, java
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问题描述
public boolean Winner() {
for (int z = 0; z < 3; z++) {
if (board[z] != null && board[z] == board[z+3] && board[z] == board[z+6]
) {
return true;
}
}
for(int i=0; i<7;i+=3){
if (board[i] != null && board[i] == board[i+1] && board[i] == board[i+2]) {
return true;}
}
}
它返回给我这个错误:这个方法必须返回一个布尔类型的结果.我做错了什么?
It returns me this error: this method must return a result of type boolean. What am I doing wrong?
推荐答案
目前,该函数不保证返回 boolean
,因为可能没有 if
语句将永远被输入.
Right now, the function isn't guaranteed to return a boolean
, because it's possible that neither of the if
statements will ever be entered.
你可以像这样修复它(但只有如果它确实是你的逻辑需要的时候这样做!):
You could fix it like this (but only do this if it's actually what your logic needs!):
public boolean Winner() {
for (int z = 0; z < 3; z++) {
if (board[z] != null && board[z] == board[z+3] && board[z] == board[z+6]
) {
return true;
}
}
for(int i=0; i<7;i+=3){
if (board[i] != null && board[i] == board[i+1] && board[i] == board[i+2]) {
return true;}
}
return false;
}
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