int can't be dereferenced

[shana07]

Good Day!
How to tackle 'int can't be dereference'?. What does it mean?
Please give me some pointer....thanks guys

public static void main(String[] args) 
    {
         int opcode = GCD; 
 
         String out="";
 
        int b2 = 300;
        int b1 = 700;
 
         switch (opcode) 
         {           
            case GCD:       out = b1.gcd(b2).toString(); // THE ERROR COMES FROM HERE....
                            break;
            default:        throw new BigAlException("invalid operation");
        }
 
          System.out.println(out);

[r035198x]

Good Day!
How to tackle 'int can't be dereference'?. What does it mean?
Please give me some pointer....thanks guys

public static void main(String[] args) 
{
int opcode = GCD; 
 
String out="";
 
int b2 = 300;
int b1 = 700;
 
switch (opcode) 
{ 
case GCD: out = b1.gcd(b2).toString(); // THE ERROR COMES FROM HERE....
break;
default: throw new BigAlException("invalid operation");
}
 
System.out.println(out);

b1.gcd(b2).toString b1 is an int and you are trying to call a method on it! Remember you can only call methods on objects not on primitives.

[shana07]

b1.gcd(b2).toString b1 is an int and you are trying to call a method on it! Remember you can only call methods on objects not on primitives.

How should I do to call gcd method by parsing int b1 and int b2?

[r035198x]

How should I do to call gcd method by parsing int b1 and int b2?

Wrap then in BigInteger

[shana07]

Wrap then in BigInteger

such this?

BigInteger b1=null, b2=null;
 
        b2 = receiveNumber(arrayArgs[1]);
        b1 = receiveNumber(arrayArgs[0]);

btw, is there any gcd method in integer java core class? I mean no BigInteger?
Is like I want to skip BigInteger..

[r035198x]

such this?

BigInteger b1=null, b2=null;
 
b2 = receiveNumber(arrayArgs[1]);
b1 = receiveNumber(arrayArgs[0]);

btw, is there any gcd method in integer java core class? I mean no BigInteger?
Is like I want to skip BigInteger..

You can always check the docs. Does your receiveNumber method return a BigInteger?

[shana07]

You can always check the docs. Does your receiveNumber method return a BigInteger?

it does....

 BigInteger b = null;
 
        b = new BigInteger(str);  
        return b;

I am just wondering, is there any normal gcd (int a, int b) in other java core class as this method calls BigInteger gcd.....

[r035198x]

it does....

 BigInteger b = null;
 
b = new BigInteger(str); 
return b;

I am just wondering, is there any normal gcd (int a, int b) in other java core class as this method calls BigInteger gcd.....

You should just write your own method.