制作两个单独的 java bean 时的接口或抽象 class

Question

我的网站项目有两种材料，我想在其中为用户订购车库。

到目前为止我有一个 class:

public class 订单行 {

private int materialId;
private String name;
private int length;
private int amount;
private String description;
private int price;
private int materialgroup;

public OrderLine(int materialId, String name, int length, int amount, String description, int price, int materialgroup) {
    this.materialId = materialId;
    this.name = name;
    this.length = length;
    this.amount = amount;
    this.description = description;
    this.price = price;
    this.materialgroup = materialgroup;
}

public int getMaterialId() {
    return materialId;
}

public void setMaterialId(int materialId) {
    this.materialId = materialId;
}

public String getName() {
    return name;
}

public void setName(String name) {
    this.name = name;
}

public int getLength() {
    return length;
}

public void setLength(int length) {
    this.length = length;
}

public int getAmount() {
    return amount;
}

public void setAmount(int amount) {
    this.amount = amount;
}

public String getDescription() {
    return description;
}

public void setDescription(String description) {
    this.description = description;
}

public int getPrice() {
    return price;
}

public void setPrice(int price) {
    this.price = price;
}

public int getMaterialgroup() {
    return materialgroup;
}

public void setMaterialgroup(int materialgroup) {
    this.materialgroup = materialgroup;
}

@Override
public String toString() {
    return name + "" + length + "" + amount + "" + description;
}

}

到目前为止这只是一个 java bean，因为我的所有计算方法都在一个单独的 class 中。但是我想制作两种不同的 classes，一种有数量，一种没有数量，我怎样才能以最简单的方式做到这一点

Answer 1

你可以只使用 java 继承

class Super {
   int a;
}
class Sub extends Super {
  int b; 
}

Sub会继承Super的所有属性和方法。

制作两个单独的 java bean 时的接口或抽象 class

interface or abstract class when making two seperate java beans

java

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