what is the explanation of this precedence in strings in java?
public class PrecedenceInStrings {
public static void main(String[] args){
int x = 3;
int y = 5;
String s6 = x + y + "total";
String s7 = "total " + x + y;
String s8 = " " + x + y + "total";
System.out.println(s6 + "\n" + s7 + "\n" + s8);
}
}
output:
8total
total 35
35total
Java compiler processes operators + in your expressions left to right. When it comes to the first + in
x + y + "total"
it sees ints on both sides, so it performs an addition. When Java compiler processes the second +, it sees an int and a String, and interprets the operator as string concatenation.
In your second and third expressions the left-hand side of the + operator is a string, so all operators get interpreted as concatenations.
If you want to force a specific order of operations, use parentheses. For example, if you would like to get the total in your third example, parenthesize the addition, like this:
String s8 = " " + (x + y) + "total";
