Java学习25------Arrays类讲解

public class ArrayDemo06 {
    public static void main(String[] args) {
        int[] a ={1,2,34,4985,6,98,};
       // System.out.println(a);//[I@7f31245a
        //打印数组元素Arrays.toString
        //System.out.println(Arrays.toString(a));
        Arrays.sort(a);//数组进行排序;升序
        System.out.println(Arrays.toString(a));
        Arrays.fill(a,2,4,0);//数组填充
        System.out.println(Arrays.toString(a));

    }

    public static void printArray(int[] a) {
        for (int i = 0; i < a.length; i++) {
            if (i==0){
                System.out.println("[");
            }
            if (i==a.length){
                System.out.println(a[i]+"]");
            }else {
                System.out.println(a[i]+",");
            }

        }

    }
}