public class Alone42{
    public static void main(Sring[] args){
        int a=10;
        double i=(double)a%2;
        if(i=0){
            System.out.println("为偶数");
            
            }
            else{
             System.out.println("为奇数");    
             }
    }
}

if(i == 0)

还是不对

它说 public static void main(Sring[] args){ 找不到符号

public static void main(String[] args){

谢谢 你