Java中如何使用数组？

一：定义一个数组

type[] arrayName;

二：数组的初始化操作

静态初始化，指定数组初始值，不指定数组长度；(book =new String[] {"西游记","红楼梦","三国演义","水浒传"};)

动态初始化，指定数组长度，不指定数组初始值。(String[] creat = new String[4];)

三：遍历一个数组

for(String temp : book){
   System.out.println(temp);
  }

四：关于多维数组

多维数组与一维数组相似，下面给出简单实例代码说明用法。

package UseArray;

public class Array_01 {
	public static void main(String args[]){
		//定义一个数组 type[] arrayName
		String[] book;
		//初始化方式：静态初始化，指定数组初始值，不指定数组长度；
		book =new String[] {"西游记","红楼梦","三国演义","水浒传"};
		//动态初始化，指定数组长度，不指定数组初始值
		String[] creat = new String[4];
		creat[0] = "火药";
		creat[1] = "指南针";
		creat[2] = "造纸术";
		creat[3] = "印刷术";
		for(String temp : book){
			System.out.println(temp);
		}
		//如何使用多维数组？
		String[][] num1 = {{"一","二","三","四"},{"1","2","3","4"}};
		String[][] num2 = new String[2][4];
		num2 = new String[][]{{"一","二","三","四"},{"1","2","3","4"}};
		String[][] num3 = new String[2][];
		num3[0] = new String[]{"一","二","三","四"};
		num3[1] = new String[]{"1","2","3","4"};
		for(String tempArray[] : num1){
			for(String temp : tempArray){
				System.out.println(temp);
			}
		}
	}
}