如何使用OR运算符

Question

我正在使用if语句:

if(test == 1 || test == 2){
    do something
}

我在Java工作,不知何故这个代码产生"坏操作数类型"的错误.我知道它是OR(||),但我不知道如何解决它.码:

public static int[] map = 
//1  2  3  4  5  6  7  8  9 10
{ 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, //0
  1, 1, 1, 1, 1, 1, 1, 1, 1, 1, //1
  1, 1, 1, 1, 1, 1, 1, 1, 1, 1, //2
  1, 1, 1, 1, 1, 1, 1, 1, 1, 1, //3
  1, 1, 1, 1, 1, 1, 1, 1, 1, 1, //4
  1, 1, 1, 1, 1, 1, 1, 1, 1, 1, //5
  1, 1, 1, 1, 1, 1, 1, 1, 1, 1, //6
  1, 1, 1, 1, 1, 1, 1, 1, 1, 1, //7
  1, 1, 1, 1, 1, 1, 1, 1, 1, 1, //8
  1, 1, 1, 1, 1, 1, 1, 1, 1, 1, //9
};
public static int mapRow, mapCol;
public static int mapRef = (mapRow + (mapCol * 10)) - 1;

String grass = "[ ] ";
String water = "{} ";

private int counter = 0;

void mapCreate(){
    while(counter != 99){
        if((counter = 0) || (counter = 10) || (counter = 20) || (counter = 30) || (counter = 40) || (counter = 50) 
                                           || (counter = 60) || (counter = 70) || (counter = 80) || (counter = 90) || (counter = 100)){
            if(map[counter] == 1){
                System.out.println(grass);
            } else if(map[counter] == 2){
                System.out.println(water);
            }
        } else {
            if(map[counter] == 1){
                System.out.print(grass);
            } else if(map[counter] == 2){
                System.out.print(water);
            }
        }
        counter++;
    }
}

错误:

mapcreater.java:27: error: bad operand types for binary operator '||'
        if((counter = 0) || (counter = 10) || (counter = 20) || (counter = 30) ||         (counter = 40) || (counter = 50)

Answer 1

不要将int值与=赋值运算符进行比较.使用==比较,这会导致需要boolean.更改

if((counter = 0) ||

至

if((counter == 0) || // And the others after it also.