Final cannot be assigned.. Mas nao tem nenhum final @@

public class FacadeOpFinanceiras implements IOpFinanceira{


	@Override
	public boolean checkName() {//"checa" se o nome esta sujo ou nao
		// TODO Auto-generated method stub
		return true;
	}

	@Override
	public boolean raiseCredit(double val) {
		val=Math.abs(val);//ignorando valores negativos
		if(val/IOpFinanceira.credit<=0.3){//aumenta apenas 30% do credito atual
			IOpFinanceira.credit+=val;
			return true;
		}
		return false;
	}

	@Override
	public void setCredit(double val) {
		// TODO Auto-generated method stub
		IOpFinanceira.credit=val;
	}	
	
	@Override
	public double getCredit() {
		// TODO Auto-generated method stub
		return IOpFinanceira.credit;
	}

}

public interface IOpFinanceira {

	public static double credit=2000;
	
	boolean checkName();
	double getCredit();
	boolean raiseCredit(double val);
	void setCredit(double val);
	
}