引用类型数组的建立

一.用数组保存一个对象表的例子。

Object[] obj = new Object[]{"张三",15,"男"};
Object[] obj2 = new Object[] {"李四",35,"男"};
Object[] obj3 = new Object[] {"王五",18,"女"};

System.out.println(obj[1]);  // 15
	
Object[] human = new Object[3][];
human[0] = obj;
human[1] = obj2;
human[2] = obj3;
	
System.out.println(Arrays.toString(obj));
//结果为	[张三, 15, 男]
System.out.println(Arrays.deepToString(human));
//结果为 	[[张三, 15, 男], [李四, 35, 男], [王五, 18, 女]]

二.用数组保存对象的例子

import java.util.Arrays;

public class temp {
	public static void main(String[] args) {
	//创建引用类型数组
	User[] user =new User[3];
	user[0] = new User(1001, "甲");
	user[1] = new User(1002, "乙");
	user[2] = new User(1003, "丙");
	
	//数组中每一个元素的信息是 对象的地址！
	
	for(User a:user) {
		System.out.println(a.getName());
	}

}

}
class User{
	private int num;
	private String name;
	public User(int num,String name) {
		this.num = num;
		this.name = name;
	}
	public String getName() {
		return name;
	}
	public void setName(String name) {
		this.name = name;
}
	
}

另外，也可以这样直接创建出数组：

public class temp {
	public static void main(String[] args) {
	//创建引用类型数组
	User[] user = {
			new User(1001,"甲"),	
			new User(1002,"乙"),
			new User(1003,"丙")
	};
	
	//数组中每一个元素的信息是 对象的地址！
	
	for(User a:user ) {
		System.out.println(a.getName());
	}

}
}
class User{
	private int num;
	private String name;
	public User(int num,String name) {
		this.num = num;
		this.name = name;
	}
	public String getName() {
		return name;
	}
	public void setName(String name) {
		this.name = name;
	}
	
}