数组查找
数组查表法(根据键盘录入索引,查找对应星期)
public static String getWeek(int week){ String[] arr = {" ","一","二","三","四","五","六","日"}; return arr[week]; } public static void main(String[] args) { Scanner sc = new Scanner(System.in); System.out.print("对应星期的索引是:"); int num = sc.nextInt(); String date = getWeek(num); System.out.print("今天是星期"+date); } }
数组元素查找(查找指定元素第一次在数组中出现的索引)
public static int getIndex(int[] arr,int num){ for (int i = 0; i < arr.length; i++) { if (arr[i] == num) { return i; } } return -1; } public static void main(String[] args) { int[] arr = {1,2,4,6,3,8,2,0,6}; int index = getIndex(arr, 8); System.out.println("元素第一次出现的索引是:"+index); }