Error: '{' expected

[romina]

Hello, I have this stupid error. I would probably laugh at myself, because my error is "{" missing on like 34. It is pretty simple I would assume, but I cant figure out what I'm missing. The big thing I have noticed in Java in that everything has to be in classes, so I'm not sure if my set up is right. But yeah, I'm pretty much trying to code this program like I would in C++.

Code:

> Executing: C:\bin\javac.exe" "C:\dsp1.java"

C:\dsp1.java:34: '{' expected
public class fraction() {
^
1 error
> Execution finished.

Code:

import java.util.Scanner;

public class dsp1 {

public static void main(String[] args)
 {    fraction x=new fraction(), 
               y=new fraction(),
               result=null;
      String op;
      Scanner kb=new Scanner(System.in);

      System.out.print("please enter an expression int int op int int\n");
      System.out.print("for example, 3 4 - 2 3 \n");
      System.out.print("where 3 4 and 2 3 represent the fractions 3/4 and 2/3:\n");

      x.read(kb);    //read the first fraction
      op=kb.next();  //read the operator
      y.read(kb);    //read the second fraction

      switch(op.charAt(0))
      { case '+': result=x.plus(y); break;
	case '-': result=x.minus(y); break;
	case '*': result=x.times(y); break;
	case '/': result=x.div(y); break;
	default: System.out.println("incorrect operator");
	         System.exit(1);
       }
       if (result!=null) System.out.print(x+" "+op+" "+y+" = "+result+"\n");

   } //end main()
   
 } //end dsp1

public class fraction() {
	public int num, den;

	public void read();
	public fraction plus(fraction);
	/*public fraction minus(fraction);
	public fraction times(fraction);
	public fraction div(fraction);*/
	public void lcf();

	void read(){
		num = kb.next();
		den = kb.next();
		return;
	}
	fraction plus(fraction k){
		fraction temp;
		temp.den = den * k.den;
		temp.num = (num*k.den)+(k.num*den);
		temp.lcf();
		return temp;
	}

	void lcf(){
		for(int x = den;x > 0;x--){
			if(den%x == 0 && num%x == 0){
				den = den/x;
				num = num/x;
		         }
		}
	}
}

Do I have to define kb for both classes, or just main?
Thanks.

[shanePreater]

The simple answer is yes you do as they are different classes. You could, however, pass the scanner into the read function:

Code:

public void read(Scanner kb) {
.....
}

You must have the code for the fraction class in its own file called fraction.java which is what has probably confused you.