Returning String from a int function

Question

My question is simple, im having trouble on returning my value(sorry im a beginner)

int modulo10(String a, String b) {
String res;
int x = Integer.parseInt(a);
int y = Integer.parseInt(b);
x = (x+y)%y;

res = Integer.toString(x);
return res;
}

Answer 1

Java is a strongly typed language. From the line String res; , res is a String variable, but you are trying to put an Integer inside.

As x is an Integer and contains the value you want to return, you can just return x instead.

You can convert an Integer into an int , because of autoboxing , and you can do the reverse because of unboxing. More generally, you can convert any primitive type into its wrapper class ( Integer for int , Boolean for boolean , etc).

Answer 2

You cannot do that. You declared that your method returns an int and you try to return a String - pick one. Either change your method to return String or just return x; .

Answer 3

You can't return a string from a function having int return type .

int modulo10 (int a, int b){
int x;

x = (a+b)%b;

return x;

}

Answer 4

change the return type of the method

int modulo10(String a, String b) {

into

String modulo10(String a, String b) {

or simply return your int x without converting it into String res, depends what you want to do with it

Answer 5

If String a,b conatains any non-numeric value it will give ParseException. And As your method return int value,you are returning string value.So Java will throw exception.Hope you will get your point.

Answer 6

将数据类型从 int 更改为 String