给方法传值

/*给方法传值
 * 1.形参*/
public class Geifangfachuanzhi {
    String name;
    
    public void bark(int x){ //x为形参
        while(x>0){
            System.out.println("汪");
            x = x-1; //知道x为0跳出循环
        }
    }
  
    public static void main(String[] args){
        Geifangfachuanzhi dog1 = new Geifangfachuanzhi();
        dog1.name = "旺财";
        dog1.bark(3); // 3为实参
    }
}