package com.imooc.nonmotor;public class NonMotor {private String name;private String color;private int lunzi;private int chair;public NonMotor() {}public void NonMotor(String name,String color) { this.name=name; this.color=color; }public ?NonMotor(String name,String color,int lunzi, int chair) { this.name=name; this.color=color; this.lunzi=lunzi; this.chair=chair; }public String getName() { return name;}public void setName(String name) { this.name = name;}public String getColor() { return color;}public void setColor(String color) { this.color = color;}public int getLunzi() { return lunzi;}public void setLunzi(int lunzi) { this.lunzi = lunzi;}public int getChair() { return chair;}public void setChair(int chair) { this.chair = chair;}public String work(String name, String color,int lunzi, int chair) { System.out.println("父類信息測(cè)試：這是一輛"+ color ?+ "色的"+name+"牌非機(jī)動(dòng)車，有"+ lunzi+"個(gè)輪子,有"+chair +"個(gè)座椅") ; return ?name;//我不理解，為什么讓返回一個(gè)。} }package com.imooc.test;import com.imooc.nonmotor.Bicycle;import com.imooc.nonmotor.ElectricVehicle;import com.imooc.nonmotor.NonMotor;import com.imooc.nonmotor.Tricycle;public class Test {public static void main(String[] args) { NonMotor one = new NonMotor(); one.work("天宇","紅", 4, 1); Bicycle two = new Bicycle(); two.biwork("捷安特", "黃", 1, 1); ElectricVehicle three = new ElectricVehicle(); three.elwork("天宇","紅", 4, 1, "飛鴿"); Tricycle four = new Tricycle(); four.triwork("天", "洪", 3, 1); }}父類信息測(cè)試：這是一輛紅色的天宇牌非機(jī)動(dòng)車，有4個(gè)輪子,有1個(gè)座椅自行車類信息測(cè)試：這是一輛黃色的捷安特牌自行車電動(dòng)車類信息測(cè)試：這是一輛使用飛鴿牌電池的非機(jī)動(dòng)車三輪車類信息測(cè)試：三輪車是一款有3個(gè)輪子的非機(jī)動(dòng)車整個(gè)代碼運(yùn)行最后正常。我只是非常不理解，為什么return name 這一個(gè)參數(shù) ?它就能顯示正常？