运用参数与返回类型

/*运用参数与返回类型
 * getter ,setter
 * 1.getter返回实例变量的值
 * 2.setter通过参数设置实例变量的值*/

public class Yunyongcanshu {
    String brand;//品牌
    int numPickups;//拾音器
    boolean rockUseIt;//摇滚
    
    String getBrand(){
        return brand;
    }
    void  setBrand(String aBrand){
        brand = aBrand;
    }
    int getNumPickups(){
        return numPickups;
    }
    void setNumPickups(int num){
        numPickups = num;
    }
    boolean getRockUseIt(){
        return rockUseIt;
    }
    void setRockUseIt(boolean yesOrno){
        rockUseIt = yesOrno;
    }
    
    public static void main(String[] args){
        Yunyongcanshu guitar = new Yunyongcanshu();
        guitar.setBrand("纵向科技");
        guitar.setNumPickups(3);
        //guitar.setNumPickups(6);
        guitar.setRockUseIt(true);
        
        System.out.println("吉他牌子是："+guitar.getBrand());
        System.out.println("吉他的pickup数目是："+guitar.getNumPickups());
        System.out.println("是否属于摇滚明星的吉他："+guitar.getRockUseIt());
    }
 
}