java中一维数组的定义和遍历

public class ArrayDemo1{
    public static void main(String[] args){
        //1 定义数组 并同时赋值
        int[] arr = new int[]{3,9,5,8,2};
        //                            4
        System.out.println(arr.length);
        System.out.println(arr[arr.length-1]);
        System.out.println("=========================");
        //2定义数组 直接用大括号赋值
        int[] arr1 = {22,56,89};
        System.out.println(arr1[arr1.length-1]);
        // 3 为数组赋值
        arr1[2] = 111;
        System.out.println(arr1[arr1.length-1]);
    }
}

public class ArrayDemo2{
    public static void main(String[] args){
        //1 定义数组 并同时赋值
        int[] arr = {3,9,5,8,2,87};
        int max=arr[0];
        for(int i=0;i<=5;i++){
            //遍历
            //System.out.println(arr[i]);
            if(max<arr[i]){
                max=arr[i];
            }
        }
        System.out.println(max);

    }
}