数组数据结构的使用与代码编写(二)

数组数据结构的使用与代码编写(二)

定义数组

		Student students[]=new Student[3];
		students[0]=new Student("张三",10);
		students[1]=new Student("李四",11);
		students[2]=new Student("王五",12);

            for(Student s:students){
			System.out.println(s);
	     	}

String[] abc = new String[] { "abc", "acd", "add" };
String[] abd = new String[] {"acd", "cd", "de"};

另外一种方式定义数组

int arr2[];
// 定义一个数组，并且静态初始化
int arr[]=new int[]{1,2,3};

定义动态数组

	                Object[] pointX = null;
		        Object[] pointY = null;
			String sql1 = "select t.* from place t";
			List points =query(sql1, covergeId);
			 pointX = new Object[points.size()];
			 pointY = new Object[points.size()];
			for(int j=0;j{1,2,3},{4,5,6},{7,8,9}};
		
		for(int i=0;i