``java
public class Demo03 {
public static void main(String[] args){
System.out.println("Hello World !");

    int[] arrays = {1,2,10,4,5};

    //列印陣列中的元素
    for (int i = 0; i < arrays.length; i++) {
        System.out.println(arrays[i]);
    }

    System.out.println("===================分割線==============");
    //計算所有元素的和
    int sum = 0;
    for (int i = 0; i < arrays.length; i++) {
        sum = sum + arrays[i];
    }
    System.out.println(sum);

    System.out.println("===================分割線==============");
    //查詢最大元素
    int standardMax = 0;
    for (int array : arrays) {
        if (array >= standardMax) {
            standardMax = array;
        }
    }
    System.out.println(standardMax);

    //查詢最大元素方法二
    int standardMax1 = arrays[0];
    for (int i = 1,j = arrays.length-1; i < arrays.length; i++,j--) {
        if (arrays[i] >= standardMax1){
            standardMax1 = arrays[i];
        }
    }
    System.out.println("zuida" + standardMax1);
}