晓峰沧桑: 只要逻辑没问题，代码怎么写都行！

晓峰沧桑: 这道题是让你从命令行中传参，你题意都理解错了。而且让你求大写字母的个数，你这求的是小写的个数，并且 Character 类本来就在 java.lang 中，根本不需要显式导入

晓峰沧桑: 题目说是，数组已经按照升序排好，则返回 true ，看我如何优化你的代码 [code=java] import java.util.Scanner; public class ComprehensiveExercise19 { public static void main(String[] args) { Scanner input = new Scanner(System.in); System.out.println("Enter the size of the list: "); int[] list = new int[input.nextInt()]; System.out.print("Enter the contents of the list: "); for (int i = 0; i < list.length; i++) list[i] = input.nextInt(); System.out.print("The list has " + list.length + " integers "); for (int each : list) System.out.print(each + " "); System.out.println("\nThe list is " + (isSorted(list) ? "already" : "not") + " sorted"); input.close(); } public static boolean isSorted(int[] list) { boolean isSorted = true; for (int i = 0; i < list.length - 1; i++) if (list[i] > list[i + 1]) { isSorted = false; break; } return isSorted; } } [/code]

晓峰沧桑: 看我用你一半的代码量解决这道题： [code=java] import java.util.Scanner; public class ComprehensiveExercise17 { public static void main(String[] args) { Scanner input = new Scanner(System.in); System.out.println("输入学生个数："); int numbers = input.nextInt(); String[] names = new String[numbers]; int[] scores = new int[numbers]; for (int i = 0; i < numbers; i++) { System.out.println("输入第 " + (i + 1) + " 个学生的姓名："); names[i] = input.next(); System.out.println("输入 " + names[i] + " 的分数："); scores[i] = input.nextInt(); } for (int i = 0; i < numbers - 1; i++) { for (int j = i + 1; j < numbers; j++) { if (scores[j] > scores[i]) { int tempScore = scores[i]; scores[i] = scores[j]; scores[j] = tempScore; String tempName = names[i]; names[i] = names[j]; names[j] = tempName; } } } for (String each : names) { System.out.print(each + " "); } input.close(); } } [/code]

晓峰沧桑: 你題意理解錯了吧，不應該是用戶每輸入一個值，數組就動態擴展一次嗎？[code=java] Scanner input = new Scanner(System.in); int startLength = 1, inputValue; int[] intArray, tempArray = new int[startLength]; System.out.println("Enter the integers between 1 and 100: "); do { inputValue = input.nextInt(); if (inputValue != 0) { intArray = new int[startLength]; intArray[startLength - 1] = inputValue; } else { intArray = new int[startLength - 1]; intArray[startLength - 2] = inputValue; } for (int j = 0; j < startLength - 1; j++) intArray[j] = tempArray[j]; tempArray = intArray; startLength++; } while (inputValue != 0); [/code]