java数组05-数组的使用

1.for循环

2.for-each循环

3.数组作方法入参

4.数组作返回值

例   ：

public class Demo02 {
    public static void main(String[] args) {
        int[] i = {1,2,3,4,5,6,7,8,9};
        //printArray(i);
        //Sum(i);
       // Max(i);
     int[] array =   inverseArrays(i);
     printArray(array);
    }
    //翻转数组
    public static  int[] inverseArrays(int[] arrays){
       int[] result = new int[arrays.length];
        for (int i = 0, j =arrays.length-1; i <arrays.length ; i++,j--) {
            result[j] = arrays[i];
        }
       return  result;
    }
    //打印数组
    public static  void printArray(int[] arrays){
        for (int i = 0; i <arrays.length; i++) {
            System.out.print(arrays[i]+" ");
        }
    }
    //计算所有数组中数据的和
    public static void Sum(int[] arrays){
        int sum =0;
        for (int i = 0; i <arrays.length ; i++) {
            sum = sum + arrays[i];
        }
        System.out.println(sum);
    }
    //求数组中元素的最大值
    public static void Max(int[] arrays){
        int max = arrays[0];
        for (int i = 1; i <arrays.length ; i++) {
            if (arrays[i]>max){
                max = arrays[i];
            }
        }
        System.out.println("max="+max );
    }
}

java数组05-数组的使用

原文：https://www.cnblogs.com/xieboxuejava/p/14887664.html