Would some one be able to help me please?
If I have a class like this
public class a {
public String b (String c){
String d = "e";
return d;
}
}
When I call a f = new a();
f.b();
I'm unable to have the string d returned. I get the error "cannot be applied to ()"
I'm sure I'm doing something stupid but I cant work it out.
You have
public String b (String c){
but call b() without any parameter. That's what the error wants to tell you...
Your method b requires a String to be passed into it.
When you call f.b() it looks for a method with a signature similar to
public String b(){
// your code
}
You have to call like
f.b(aStringVariable);
or
f.b("Some String");
You have to pass the variable while calling the function.
Add ... to your method parameter declaration. This will make String parameter optional.
public String b (String... c){
String d = "e";
return d;
}
and then new a().b().
When you call f.b() you're not passing a string to the method. You declared your function as public String b(String c). That means you have to pass a string when you call f.b.
If you change you declaration to public String b() you do not have to pass a string.
Another solution is simply passing a string, i.e f.b("a string").
You are passing String c into your b method
public String b (String c)
you are getting that error because there needs to be a string variable like
a f = new a(); f.b(c);
Where c is some predefined string.
Use some string parameter and it will work: f.b("String")
