01 What Are Collections and Why Use Them : The Array Problem

最新推荐文章于 2024-01-13 16:50:41 发布

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本文探讨了Java中产品类的设计，包括属性定义、构造方法及toString()方法的重写。同时，深入讲解了如何使用数组进行产品实例的创建、打印、添加及复制，并提供了具体的代码实现。

Product.java

public class Product {
	private final String name;
	private final int weight;
	public Product(String name, int weight) {
		super();
		this.name = name;
		this.weight = weight;
	}
	public String getName() {
		return name;
	}
	public int getWeight() {
		return weight;
	}
	@Override
	public String toString() {
		return "Product [name=" + name + ", weight=" + weight + "]";
	}
	
}

TheArrayProlem.java


public class TheArrayProlem {

	public static void main(String[] args) {
		// TODO Auto-generated method stub
		Product door =new Product("Wooden Door", 35);
		Product floorPanel=new Product("Floor Panel", 25);
		//Creat
		
		//Print
		
		//Add
		
		//Dupicate

	}
}

TheArryProblem1.java

import java.util.Arrays;

public class TheArrayProblem {

	public static void main(String[] args) {
		// TODO 自动生成的方法存根
		Product door =new Product("Wooden Door", 35);
		Product floorPanel=new Product("Floor Panel", 25);
		//Creat
		
		//Print
		
		//Add
		
		//Dupicate

	}
	
	private static Product[] add(Product product,Product[] array){
		int length=array.length;
		Product[] newArray=Arrays.copyOf(array, length+1);
		newArray[length]=product;
		return newArray;		
	}
}

TheArrayProblem2.java

import java.util.Arrays;

public class TheArrayProblem {

	public static void main(String[] args) {
		// TODO 自动生成的方法存根
		Product door =new Product("Wooden Door", 35);
		Product floorPanel=new Product("Floor Panel", 25);
		//Creat
		Product[] products={door,floorPanel};
		System.out.println(Arrays.toString(products));
		//Print
		
		//Add
		
		//Dupicate

	}
	private static Product[] add(Product product,Product[] array)
	{
		int length=array.length;
		Product[] newArray=Arrays.copyOf(array, length+1);
		newArray[length]=product;
		return newArray;		
	}	
}