我该怎么做长值循环

Question

I need to do codes with for loop and long value like this:

for(long i=1;i<lines.length; i++){

    char tmp = lines[i].charAt(lines[i].length()-1);

    int index = lines[i].lastIndexOf(" ");

    lines[i] = lines[i].substring(0, index);

    if(tmp != lastChar)
        lines[i] = "S" + lines[i];
    else
        lines[i]=" "+lines[i];

    lastChar = tmp;        
}

The problem is: incompatible types:possible lossy conversion from long to int I don't know how to fix it

Answer 1

you are using long in for loop that is correct but when you are using index in lines[i] then problem start. java says index is always int but in your case it is long.

and long can not cast directly into int.either change long data type to int data type in for loop or cast i variable when you are using as index like lines[(int)i] (not prefer).