Question

I have this coding inside my java file .
This code basically receives an int value and sets a char value for an Object

Student st = new Student();

if (attributeName.equals("Grade")) {
    int sidevalue = Integer.parseInt(attribute.getValue());  // This returns an int value , and this value needs to be converted into char later as shown 
    if(sidevalue==1)
        st.grade=1;
    else if(sidevalue==2)
        st.grade=2;
    else if(sidevalue==5)
        st.grade=3;
}


class Student
{
    char grade ;
}

Answer 1

A switch case check here statement could avoid multiple if else indentation!

switch(sidevalue){

   case 1: st.grade = 1;
            break;
   case 2: st.grade = 2;
            break;
   case 5: st.grade = 3;
            break;
   default: break;
}

There is no significant execution difference in running between if-else and switch.
Observed differences may be due to the sample space of the particular code you are running.

In the little code snippet you provide there is not a best choice, except that switch statement provides improved readability.

Check these links for further details:

• Is "else if" faster than "switch() case"?
• if-else vs switch
• When to use If-else if-else over switch statments and vice versa