I have the following java code problems

public class b {

public class b {
    public static void main(String[] args) {
        byte b = 1;
        long l = 127;
    //  b = b + l;            // 1 if I try this then it does not compile
        b += l;               // 2 if I try this then it does     compile
        System.out.println(b);  
    }
}

I'm using this code, but I have a problem: I don't understand why B = B L; No compilation, but if I write B = L; Then it compiles and runs

Please explain why

Solution

This is the advantage of compound assignment operators (such as =, – =, etc.) over assignment operators. You must explicitly convert to the type on the right, but if you use compound assignment operators, it will implicitly perform this operation for you As in your case