Java面向对象基础编程

Question

怎样改变才不是空值，标红的地方怎么改都是标红，添加了参数还是会报错，求问

Answer 1

将题主的代码写了一点，题主可以作为参考，望采纳

public class Clock {
    //你的参数
    String structure;
    String style;
    double price;
    String time;
    //无参构造
    public Clock() {
    }
    //全参构造
    public Clock(String structure, String style, double price, String time) {
        this.structure = structure;
        this.style = style;
        this.price = price;
        this.time = time;
    }
    //以下为全部参数的get和set方法
    public String getStructure() {
        return structure;
    }
    
    public void setStructure(String structure) {
        this.structure = structure;
    }
    
    public String getStyle() {
        return style;
    }
    
    public void setStyle(String style) {
        this.style = style;
    }
    
    public double getPrice() {
        return price;
    }
    
    public void setPrice(double price) {
        this.price = price;
    }
    
    public String getTime() {
        return time;
    }
    
    public void setTime(String time) {
        this.time = time;
    }
    
    public static void main(String[] args) {
        //创建对象
        Clock clock=new Clock();
//    没有给structure设置值    打印为空
        System.out.println(clock.structure);
//        给structure设置值，打印“我是structure”
        clock.setStructure("我是structure");
        System.out.println(clock.structure);
    }