如果在我的Java拼写检查程序中未执行语句

Question

我需要检查作为输入提供的拼写是否正确，但是它没有输入我的if语句中。

我能够验证变量word是否正确获得了“ RAINBOW”，但是为什么我不参与if语句中的验证

 import java.util.Scanner;
class Character
{
    public static void main(String[] args)
    {
        String first;
        String second;
        String third;
        String fourth;
        String fifth;
        String sixth;
        String seventh;
       String word;

        Scanner sc=new Scanner(System.in);
        System.out.println("Enter the first letter");
        first=sc.next();
        System.out.println("Enter the second letter");
        second=sc.next();
         System.out.println("Enter the third letter");
        third=sc.next();
         System.out.println("Enter the fourth letter");
        fourth=sc.next();
         System.out.println("Enter the fifth letter");
        fifth=sc.next();
         System.out.println("Enter the sixth letter");
        sixth=sc.next();
         System.out.println("Enter the seventh letter");
        seventh=sc.next();
        word =first+second+third+fourth+fifth+sixth+seventh;

        if(word=="RAINBOW")

           System.out.println(word);    



         else

        System.out.println("Wrong"); 

    }
}