Question

请教高手java 非法类型的开始 需要标识符

package org.cadenhead.ecommerce;

import java.util.*;

public class Item implements Coparable{
private String id;
private String name;
private double retail;
private int quantity;
private double price;

Item (String idIn,String nameIn,String retailIn,String quanIn){
id=idIn;
name=nameIn;
retail=Double.parseDouble(retailIn);
quantity=Integer.parseInt(quanIn);
}

if(quantity>400)
price=retail*.5D;
else if(quantity>200)
price=retail*.6D;
else
price=retail*.7D;
price=Math.floor(price*100+.5)/100;

public int compareTo(Object obj){
Item temp=(Item)obj;
if(this.price<temp.price)
return 1;
else if(this.price>temp.price)
return -1;
else
return 0;
}

public String getId(){
return id;
}

public String getName(){
return name;
}

public double getRetail(){
return retail;
}

public int getQuantity(){
return quantity;
}

public double getPrice(){
return price;
}
}
主函数在另一个文件，编译也是这个错误~~~~

Answer 1

package org.cadenhead.ecommerce;

import java.util.*;

public class Item implements Coparable{
private String id;
private String name;
private double retail;
private int quantity;
private double price;

Item (String idIn,String nameIn,String retailIn,String quanIn){
id=idIn;
name=nameIn;
retail=Double.parseDouble(retailIn);
quantity=Integer.parseInt(quanIn);

if(quantity>400)
price=retail*.5D;
else if(quantity>200)
price=retail*.6D;
else
price=retail*.7D;
price=Math.floor(price*100+.5)/100;
}

public int compareTo(Object obj){
Item temp=(Item)obj;
if(this.price<temp.price)
return 1;
else if(this.price>temp.price)
return -1;
else
return 0;
}

public String getId(){
return id;
}

public String getName(){
return name;
}

public double getRetail(){
return retail;
}

public int getQuantity(){
return quantity;
}

public double getPrice(){
return price;
}
}

这个样子就可以了