Java 运算符 || 参数类型未定义 boolean, int
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The operator || is undefined for the argument type(s) boolean, int
提问by user3294305
I have little problem with my Java code. I am using Dr.Java and it is giving me the error message that "The operator || is undefined for the argument type(s) boolean, int". If anyone could please
我的 Java 代码没什么问题。我正在使用 Dr.Java，它给我的错误消息是“运算符 || 未定义参数类型布尔型，int”。如果有人可以请
import java.util. Scanner;
public class Days
{ public static void main( String [] args)
{ Scanner in = new Scanner(System.in) ;
System.out.print(" What month is it ? " );
int month= in.nextInt();
System.out.print( " What day is it " );
int day = in.nextInt( );
**if( month == 1 || 2 || 3 )**
{ System.out.print( " Winter" ) ;
}
else
{
System.out.print( " Fall " ) ;
}
}
}
采纳答案by Jigar Joshi
month == 1 || 2 || 3
first part of expression would return booleanand you cannot ||booleanand int
表达式的第一部分将返回boolean，你不能||boolean和int
change it to
将其更改为
if( month == 1 || month == 2 || month == 3 )
or
或者
if( month >= 1 && month <= 3 )
considering monthis int
考虑month是int
回答by Suresh Atta
Your syntax is wrong. Correct syntax is
你的语法是错误的。正确的语法是
if( month == 1 || month == 2 || month ==3 ) { .... }
