2018年10月06日

目錄

1、概念

1、概念

陣列：具有相同型別的資料的集合，1）具有固定的長度；2）在記憶體中佔據連續空間；

Java中，陣列有屬性（length屬性），也有方法（clone方法）；

物件的特點：封裝了資料，同時提供一些屬性和方法，故陣列是物件！！

2、測試Demo

package testArray;

public class test_ArrayIsObject {

	public static void main(String[] args) {
		// TODO Auto-generated method stub
		int[] a = {2,3};
		int[][] b = new int[3][2];
		String [] s = {"a","b"};
		People[] people_Array = {new People(),new People()};
		
		if(a instanceof int[]) 
			System.out.println("the type of a is int[]");
		if(b instanceof int[][])
			System.out.println("the type of b is int[][]");
		if(s instanceof String[])
			System.out.println("the type of c is String[]");
		if(people_Array instanceof People[])
			System.out.println("the type of c is People[]");
	}
	
}

class People{
	int a = 1;
	String name = "abc";
	public People(int a, String name) {
		super();
		this.a = a;
		this.name = name;
	}
	
	public People() {
		super();
		// TODO Auto-generated constructor stub
	}

	public int getA() {
		return a;
	}
	public void setA(int a) {
		this.a = a;
	}
	public String getName() {
		return name;
	}
	public void setName(String name) {
		this.name = name;
	}
	
}
 

console：

the type of a is int[] the type of b is int[][] the type of c is String[] the type of c is People[]