java - Java扩展继承程序不起作用？

所以我有3个文件-在这些文件中，它给了我这个错误：


  Package中的Package不能应用于给定类型；需要
  int，char /未找到参数


我已经尝试了所有可能想到的方法，并且不知道如何解决它，这可能是菜鸟错误！所以我希望有人可以帮助解释我做错了什么。我将粘贴以下代码！

包.java

package chap10q5;

/**
 *
 * @author james
 */
public class Package {
    int weight;
    char shippingMethod;
    double shippingcost;

public Package(int weight, char shippingMethod){
    this.weight = weight;
    this.shippingMethod = shippingMethod;

    if( (this.weight > 0 && this.weight <= 8) && this.shippingMethod == 'A'){
        this.shippingcost = 2.00;
    }
    else if( (this.weight > 0 && this.weight <= 8) && this.shippingMethod == 'T'){
        this.shippingcost = 1.50;
    }
    else if( (this.weight > 0 && this.weight <= 8) && this.shippingMethod == 'M'){
        this.shippingcost = 0.50;
    }

    if( (this.weight >=9 && this.weight <= 16) && this.shippingMethod == 'A'){
        this.shippingcost = 3.00;
    }
    else if( (this.weight >= 9 && this.weight <= 16) && this.shippingMethod == 'T'){
        this.shippingcost = 2.35;
    }
    else if( (this.weight >= 9 && this.weight <= 16) && this.shippingMethod == 'M'){
        this.shippingcost = 1.50;
    }

    if( (this.weight > 17) && this.shippingMethod == 'A'){
        this.shippingcost = 4.50;
    }
    else if( (this.weight > 17) && this.shippingMethod == 'T'){
        this.shippingcost = 3.25;
    }
    else if( (this.weight > 17) && this.shippingMethod == 'M'){
        this.shippingcost = 2.15;
    }

}

public String toString(){
    return "Weight: " + this.weight + "\nShipping Method: " +
            this.shippingMethod + "\nCost: " + this.shippingcost;
}
}

InsuredPackage.java

package chap10q5;

/**
 *
 * @author james
 */
public class InsuredPackage extends Package {

public InsuredPackage(int weight, char shippingCost){
    if(super.shippingcost <= 1){
        super.shippingcost += 2.45;
    }
    else if( (super.shippingcost > 1.00) && (super.shippingcost <= 3.00) ){
        super.shippingcost += 3.95;
    }
    else if( super.shippingcost > 3 ){
        super.shippingcost += 5.55;
    }
}

@Override
public String toString(){
    return super.toString();
}
 }

UsePackage.java（我的主要方法）：

package chap10q5;

/**
 *
 * @author james
 */
public class UsePackage {
    public static void main(String[] args){
        Package one = new Package(1, 'A');

        System.out.println(one);
    }
}

最佳答案

更改

public InsuredPackage(int weight, char shippingCost){
    if(super.shippingcost <= 1){
        super.shippingcost += 2.45;
    }
    else if( (super.shippingcost > 1.00) && (super.shippingcost <= 3.00) ){
        super.shippingcost += 3.95;
    }
    else if( super.shippingcost > 3 ){
        super.shippingcost += 5.55;
    }
}

至

public InsuredPackage(int weight, char shippingMethod){
    super(weight,shippingMethod);
    if(shippingcost <= 1){
        shippingcost += 2.45;
    }
    else if( (shippingcost > 1.00) && (shippingcost <= 3.00) ){
        shippingcost += 3.95;
    }
    else if(shippingcost > 3 ){
        shippingcost += 5.55;
    }
}

关于java - Java扩展继承程序不起作用？，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/28472124/