Java - 在領域獲得價值？

Question

我不知道如何把這個，但即時通訊試圖獲得在一個字段中的值的價值。下面是一些代碼（不要問我爲什麼長度和高度）：

//person class 
public person(double w, double h, double l){ 
     this.width = w; 
     this.height = h; 
     this.length = l; 
    } 

//age class (extends person) 
    public age(double w, double h, double l, int a) { 
     super(w, h, l); 
     this.age = a; 
    } 

//Creating the objects and putting them in an array (in the main class): 
public person steve = new age(36.64, 185.64, 44.4, 26); 
public person paul = new age(45.64, 178.64, 53.4, 47); 

person[] people = new person[2]; 
people[0] = steve; 
people[1] = paul; 

現在我需要得到人們的年齡在數組中。你會怎麼做？

Answer 1

希望這有助於你瞭解:)

class Main { 
    public static void main(String[] args) { 
    Person pixelGrid = new Person(); 
    pixelGrid.setName("Pixel Grid"); 
    pixelGrid.setAge(18); 
    System.out.println(pixelGrid); 
    } 
} 

class Person { 
    protected String sName; 
    protected int sAge; 

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

    public String getName() { 
     return sName; 
    } 

    public void setAge(int sAge) { 
     this.sAge = sAge; 
    } 

    public int getAge() { 
     return sAge; 
    } 

    public String toString() { 
     String s = "The Persons Name is: " + getName() + "\n"; 
     s += "Their Age is: " + getAge() + "\n"; 
     return s; 
    } 
} 

輸出：

The Person's Name is: Pixel Grid 
Their Age is: 18 

試試吧here!

Answer 2

要直接從陣列中檢索年齡：

一些小碼更改爲主類：

public static void main(String[] args) { 
    // TODO Auto-generated method stub 


     age steve = new age(36.64, 185.64, 44.4, 26); 
     age paul = new age(45.64, 178.64, 53.4, 47); 
     age[] people = new age[2]; 
     people[0] = steve; 
     people[1] = paul; 

     System.out.println(people[0].age); 
     System.out.println(people[1].age); 
}