package javase;

public class array01 {
    public static void main(String[] args) {
        //获取数组的长度
        int[] array = new int[3];
        System.out.println(array.length);

        //数组的遍历
        int[] ints = new int[3];
        for(int i : ints){
            System.out.print(i);
        }
        System.out.println();
        //求出数组中的最值
        int[] array01 = {1,-11,2,22,3,33,4,44};
        int min = 0,max = 0;

        for(int i : array01){
            if(i > max){
                max = i;
            }else if(i < min){
                min = i;
            }else{
                continue;
            }
        }
        System.out.println("max:"+max+",min:"+min);

        System.out.println();

        //数组反转
        int[] array02 = {1,2,3,4};
        int temp = 0;
        int i = 0;
        int j = array02.length-1;
        while(i < j){
            temp = array02[i];
            array02[i] = array02[j];
            array02[j] = temp;
            i++;
            j--;
        }
        for(int k : array02){
            System.out.print(k+"\t");
        }
        int[] arrayA = new int[3];
        // 数组越界异常java.lang.ArrayIndexOutOfBoundsException
        System.out.println(arrayA[3]);

        int[] arrayB = null;
        //空指针异常java.lang.NullPointerException
        System.out.println(arrayB[0]);
    }

}

同时数组可作为方法的参数和方法的返回值