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public class Main
{
int _a;
int _b;
public Main(int a, int b)
{
this._a=a;
this._b=b;
}
public void Sum()
{
int sum=this._a+this._b;
System.out.println("a+b = "+sum);
}
public static void main(String[] args)
{
Main obj=new Main(10,20);
obj.Sum();
}
}