数组的使用

package array;
import java.util.Arrays;
public class demo04 {
    public static void main(String[] args) {
        int[] a = {1,2,3,456,74,89,25};
        // toString打印或遍历数组元素
        System.out.println(Arrays.toString(a));
        printarrays(a);
        Arrays.sort(a);//Arrays方法对数组进行排序
        System.out.println();//换行
        System.out.println(Arrays.toString(a));
Arrays.fill(a,0)//把数组a全部赋值为0
    }
    public static void printarrays(int[] a1){
        for (int i = 0; i < a1.length; i++) {
            if(i==0)
            {
                System.out.print("[");
            }
            if(i==a1.length-1)
            {
                System.out.print(a1[i]+"]");//最后一个数据时输出数据和"]"
            }
           else
            System.out.print(a1[i]+", ");
        }
    }
}