创建子类的对象数组

所以看起来我必须创建一个子类（Bicycle）的对象数组。创建子类的对象数组

然后我添加两个对象到这个..并循环数组并打印每个对象的构造。

这听起来令我感到困惑，我不确定如何去做这件事。

我还会发布我的代码的其余部分，以便更有意义。

MAIN：

package javaapplication4; 

public class JavaApplication4 { 

    public static void main(String[] args) { 

     Bicycle myBike = new Bicycle(1, "Haro BMX", true, "Handlebars, Tyres, Frame"); 
     System.out.println(myBike);   
    } 
}

package javaapplication4; 

public class Implement { 

    String name; 
    boolean hasMovingParts; 
    String constructedFrom; 

    public Implement() { 
    } 

    public Implement(String name, boolean hasMovingParts, String constructedFrom) { 
    this.name = name; 
    this.hasMovingParts = hasMovingParts; 
    this.constructedFrom= constructedFrom; 
    } 

    public String getName() { 
    return name; 
    } 

    public boolean getMovingParts() { 
    return hasMovingParts; 
    } 

    public String getConstructedFrom(){ 
    return constructedFrom; 
    } 

    public class Bicycle extends Implement { 
    public int seatNumber; 

    public Bicycle(int seatNumber, String name, boolean hasMovingParts, String constructedFrom) { 
    this.seatNumber = seatNumber; //takes the value you pass as parameter 
    this.name = name; // and stores it into the instance variable 
    this.hasMovingParts = hasMovingParts; 
    this.constructedFrom = constructedFrom; 
    } 

    @Override 
    public String toString(){ 
     return String.format("*Vehicle Statistics* Seats: %d, Name:" + 
      " %s, Contains Moving Parts: %b, Materials: %s", 
       seatNumber, name, hasMovingParts, constructedFrom); 
    } 
} 
}

package javaapplication4; 

public class Bicycle extends Implement { 
    public int seatNumber; 

    public Bicycle(int seatNumber, String name, boolean hasMovingParts, String constructedFrom) { 
    this.seatNumber = seatNumber; 
    this.name = name; 
    this.hasMovingParts = hasMovingParts; 
    this.constructedFrom = constructedFrom; 
    } 

    @Override 
    public String toString() { 
    return String.format("*Vehicle Statistics* Seats: %d, Name:" + 
     " %s, Contains Moving Parts: %b, Materials: %s", 
     seatNumber, name, hasMovingParts, constructedFrom); 
    } 
}

来源

2015-09-20 Cory Marcus

欢迎来到Stack Overflow！请阅读指南[我如何提出一个好问题]（http://stackoverflow.com/help/how-to-ask），尤其是关于最小，完整和可验证示例（MCVE）的部分。这将帮助你为自己解决问题。如果你这样做，仍然卡住，你可以回来发布你的MCVE，你试过的，以及结果是什么，所以我们可以更好地帮助你。 – JeffC

更改您的主要方法创建自行车的数组，然后通过索引添加它们：

public static void main(String[] args) { 

    Bicycle[] bicycles = new Bicycle[2]; 
    bicycles[0] = new Bicycle(1, "Haro BMX", true, "Handlebars, Tyres, Frame"); 
    bicycles[1] = new Bicycle(1, "Orah XMB", true, "Handlebars, Tyres, Frame"); 

    for (Bicycle bicycle : bicycles){ 
     System.out.println(bicycle); 
    } 
}

来源

2015-09-20 02:33:19 chenchuk

创建子类的对象数组

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