11．按要求编写Java应用程序。 创建一个叫做机动车的类： 属性：车牌号(String)，车速(int)，载重量(double) 功能：加速(车速自增)减速(车速自减)修改车牌号，查询车的(代码片段

Posted 2020-08-09

package java1;

public class Che {

        //属性

        public String nub;
        public int speed;
        public double weight ;
        
        
        Che()
        {
            nub="XX1234";
            speed=100;
            weight=100;
        }

        Che(String nub, int speed,double weight) 
        {
            this.nub = nub;
            this.speed = speed;
            this.weight = weight;
        }
        public int add(int add)
        {
            System.out.println("车速增加"+add+"当前车速为："+(speed+add));
            return speed;
        }
        public int jian(int jian)
        {
            System.out.println("车速减"+jian+"当前车速为："+(speed-jian));
            return speed;
        }
        public String setNub(String nub)
        {
            this.nub=nub;
            System.out.println("当前车牌为"+nub);
            return nub;
        }
        public double setWeight(double weight)
        {
            this.weight=weight;
            System.out.println("当前载重"+weight);
            return weight;
        }
        
}


        Che che1=new Che();
        che1.setNub("辽B5086");
        che1.add(20);
        System.out.println("车牌为："+che1.nub+",车速为："+che1.speed+"，载重为"+che1.weight);
        
        Che che2=new Che("辽B5086",150,200);
        che2.jian(20);
        System.out.println("车牌为："+che2.nub+",车速为："+che2.speed+"，载重为"+che2.weight);

当前车牌为辽B5086
车速增加20当前车速为：120
车牌为：辽B5086,车速为：100，载重为100.0
车速减20当前车速为：130
车牌为：辽B5086,车速为：150，载重为200.0