import java.util.Scanner; import java.util.Arrays; public class Main { public static void main(String[] args) { Scanner input = new Scanner(System.in); int n = input.nextInt(); int[] nums = new int[n]; for (int i = 0; i < n; i++) { nums[i] = input.nextInt(); } Arrays.sort(nums); for (int i = 0; i < n; i++) { System.out.print(nums[i] + " "); } } }是什么意思

Java语法：Scanner用法

public static void main(String[] args) { // 创建Scanner对象 Scanner sc = new Scanner(System.in); System.out.println("请输入两个整数 n 和 m:"); int n = sc.nextInt(); // 读取整数n int m = sc....

JAVA实验项目.docx

public static void main(String[] args) { System.out.println("Hello World!"); } } - **Eclipse编写** java public class HelloWorld { public static void main(String[] args) { System.out....

import java.io.*; import java.util.Arrays; import java.util.Scanner; public class FileTest { public static void main(String[] args) throws IOException { // 接收给定的一行字符串 Scanner scanner = new Scanner(System.in); String line = scanner.nextLine();

首先，通过Scanner接收用户输入的文件路径，然后判断文件是否存在。如果文件不存在，则输出提示信息并结束程序。如果文件存在，则创建文件读取器并读取文件内容，将读取到的内容存储在一个字符串变量中。最后，关闭...

package step1; /** * @author pengzheng */ import java.util.Arrays; // 导入数组工具类 Arrays import java.util.Scanner; public class TestIntArray { public static void main(String[] args) { … for (int e : a) { // 使用增强型for循环遍历数组 System.out.print(e + " "); } } }

public static void main(String[] args) { // 创建Scanner对象 Scanner scanner = new Scanner(System.in); // 读取数组长度 System.out.print("请输入数组长度："); int length = scanner.nextInt(); /...

import java.util.Arrays; import java.lang.reflect.Array; import java.lang.reflect.Field; import java.lang.reflect.Type; import java.util.Scanner; import java.lang.Math; import java.util.; public class Solution { public static void main(String[] args) { Scanner sc = new Scanner(System.in); System.out.println("本金："); double cunkuan = sc.nextDouble(); double huoqi1nian = Math.round(cunkuan + cunkuan 0.35); double huoqi2nain = Math.round(cunkuan+cunkuan * 0.35* 0.35); double dingqi1nian = Math.round(cunkuan * (1+1.50)); double dingqi2niqn = Math.round(cunkuan * (1+2.10)); System.out.println("活期一年本金总计：" + huoqi1nian); System.out.println("定期1年本经总计：" + dingqi1nian); System.out.println("活期2奶奶本经总计：" + huoqi2nain); System.out.println("定期2年本经总计：" + dingqi2niqn); } }错在哪里了

public static void main(String[] args) { Scanner sc = new Scanner(System.in); System.out.println("本金："); double cunkuan = sc.nextDouble(); double huoqi1nian = Math.round(cunkuan + cunkuan * ...

import java.io.BufferedReader; import java.io.IOException; import java.io.InputStreamReader; import java.util.ArrayList; import java.util.Arrays; import java.util.Collection; import java.util.Collections; import java.util.LinkedList; import java.util.List; import java.util.Scanner; public class Main{ public static void main(String[] args) throws IOException { BufferedReader in=new BufferedReader(new InputStreamReader(System.in)); int n; double need; double sum=0; String s[]=in.readLine().split(" "); n=Integer.parseInt(s[0]); need=Double.parseDouble(s[1]); String amount[]=in.readLine().split(" "); String price[]=in.readLine().split(" "); ArrayList<Mooncake> cakes=new ArrayList<Mooncake>(); for(int i=0;i<n;i++){ Mooncake cake=new Mooncake(); cake.setAmount(Double.parseDouble(amount[i])); cake.setSales(Double.parseDouble(price[i])); cake.setValues(Double.parseDouble(price[i])/Double.parseDouble(amount[i])); cakes.add(cake); } Collections.sort(cakes); for(Mooncake c: cakes){ if(need>=c.amount){ need=need-c.amount; sum+=c.amountc.values; } else{ sum+=needc.values; need=0; } if(need==0){ break; } } System.out.printf("%.2f",sum); } static class Mooncake implements Comparable<Mooncake>{ double amount; double sales; double values; public double getAmount() { return amount; } public void setAmount(double amount) { this.amount = amount; } public double getSales() { return sales; } public void setSales(double sales) { this.sales = sales; } public double getValues() { return values; } public void setValues(double values) { this.values = values; } @Override public int compareTo(Mooncake arg0) { // TODO Auto-generated method stub return this.values>arg0.values?-1:1; } } }转c++

把Java代码转换成C++代码如下： #include #include #include using namespace std; struct Mooncake { double amount; double sales; double values; bool operator<(const Mooncake& c) const { return ...

import java.io.*; import java.util.Arrays; import java.util.Scanner; public class FileTest { public static void main(String[] args) throws IOException, ClassNotFoundException Scanner scanner = new Scanner (System.in); String filedir = scanner. next () ; 2 String name = scanner. next () ; int age = scanner .nextInt); 1/ 请在此编写代码 Begin / 1/创建 Student 对象 /给对象属性赋值 1/序列化对象到文件中，并通过反序列化读取文件内容，最后打印对象的所有属性 End

public static void main(String[] args) throws IOException, ClassNotFoundException { Scanner scanner = new Scanner(System.in); String filedir = scanner.next(); String name = scanner.next(); int ...

import java.util.Scanner; import java.util.Arrays; import java.util.Comparator; import java.util.List; import java.util.ArrayList; import java.util.stream.Collectors; class Main { public static void main(String[] args) { Scanner scanner = new Scanner(System.in); int numberOfWineshops = scanner.nextInt(); int numberOfPickedWineshops = scanner.nextInt(); int referencePrice = scanner.nextInt(); int[] WineshopPrices = new int[numberOfWineshops]; for (int i = 0; i < numberOfWineshops; i++) { WineshopPrices[i] = scanner.nextInt(); } Arrays.sort(WineshopPrices); int[][] priceDifference = new int[numberOfWineshops][2]; for (int i = 0; i < numberOfWineshops; i++) { int price = WineshopPrices[i]; priceDifference[i][0] = price; priceDifference[i][1] = Math.abs(price - referencePrice); } List<int[]> sortedPriceDifference = Arrays.stream(priceDifference) .sorted(Comparator.comparingInt(Wineshop -> Wineshop[1])) .collect(Collectors.toList()); List<Integer> pickedWineshopPrices = new ArrayList<>(); for (int i = 0; i < numberOfPickedWineshops; i++) { pickedWineshopPrices.add(sortedPriceDifference.get(i)[0]); } pickedWineshopPrices.sort(Integer::compareTo); for (int i = 0; i < pickedWineshopPrices.size(); i++) { System.out.print(pickedWineshopPrices.get(i)); if (i != pickedWineshopPrices.size() - 1) { System.out.print(" "); } } } }；这段代码每行注释下

public static void main(String[] args) { // 定义程序的入口方法 Scanner scanner = new Scanner(System.in); // 创建Scanner对象并关联控制台输入 int numberOfWineshops = scanner.nextInt(); // 读取一个...

import java.util.Arrays;import java.util.Scanner;public class SortString { public static void main(String[] args) { Scanner scanner = new Scanner(System.in); String input = scanner.nextLine(); char[] chars = input.toCharArray(); // 将字符串转换为字符数组 Arrays.sort(chars); // 对字符数组进行排序 StringBuilder result = new StringBuilder(); int i = 0; while (i < chars.length) { int j = i + 1; while (j < chars.length && chars[j] == chars[i]) { j++; } result.append(chars[i]); i = j; } System.out.println(result.toString()); }}

这段代码从标准输入接收一个字符串输入，字符串由小写字母构成，将字符串中内容按字母表顺序排序后重新输出。若字符有重复则输出同等数量字符。如输入字符串“beaaoln”，则输出为“aabelno”。...

将这个代码补充完整package step1; /** * @author pengzheng */ [代码] // 导入数组工具类 Arrays import java.util.Scanner; public class TestIntArray { public static void main(String[] args) { … } } }

public static void main(String[] args) { // 创建Scanner对象 Scanner scanner = new Scanner(System.in); // 读取数组长度 System.out.print("请输入数组长度："); int length = scanner.nextInt(); /...

import java.util.Arrays; import java.util.Scanner; public class paixu { public static void main(String[] args) { Scanner scanner = new Scanner(System.in);//获取对象 System.out.println("请输入一些数字（以空格分隔），输入任意字母结束输入："); String input = scanner.nextLine(); String[] numbers = input.split("\\s+"); int[] arr = new int[numbers.length]; for (int i = 0; i < arr.length; i++) { arr[i] = Integer.parseInt(numbers[i]); } Arrays.sort(arr); System.out.println("排序后的结果为：" + Arrays.toString(arr)); } }

然后，我们提示用户输入一些数字，接着使用 scanner.nextLine() 方法获取用户输入的字符串。接下来，我们使用 split("\\s+") 方法将输入的字符串按空格分隔成一个字符串数组 numbers。接着，我们创建一个...

import java.util.Arrays; import java.util.Scanner; public class Main { public static void main(String[] args) { Scanner sc=new Scanner(System.in); while (sc.hasNext()){ int n = sc.nextInt(); int[] a={1,5,10,25}; int[] dp=new int[n+1]; for(int i=1;i<n+1;i++){ for (int k : a) { if (i - k >= 0) { dp[i] = dp[i - k] + 1; } } } System.out.println(dp[n]); }转c++

int main() { int n; while (cin >> n) { vector<int> a {1, 5, 10, 25}; vector<int> dp(n + 1, 0); for (int i = 1; i ; i++) { for (auto k : a) { if (i - k >= 0) { dp[i] = dp[i - k] + 1; } } } ...

import java.util.Arrays; import java.util.Scanner; public class Main { public static void main(String[] args) { // TODO Auto-generated method stub Scanner cin = new Scanner(System.in); int n = cin.nextInt(); Mouse[] a = new Mouse[n]; for (int i = 0; i < n; i++) { a[i] = new Mouse(cin.nextInt(), cin.next()); } Arrays.sort(a, (b1, b2) -> b1.weight - b2.weight); for (Mouse b : a) { System.out.println(b.color); } } } class Mouse { int weight; String color; public Mouse(int weight, String color) { super(); this.weight = weight; this.color = color; } }

这是一个Java程序，它实现了一个鼠标排序的功能。程序首先读取一个整数n，然后读取n个鼠标的重量和颜色，将它们存储在一个Mouse数组中。然后使用Arrays.sort方法对鼠标数组进行排序，排序的依据是鼠标的重量。最后，...

根据代码绘制出类图 import java.io.File; import java.io.FileNotFoundException; import java.io.PrintWriter; import java.util.Scanner; import java.util.Arrays; public class Test{ public static void main(String[] args) throws FileNotFoundException { File file = new File("Exercise12_15.txt"); if(file.exists()) { System.out.println("File already exists"); } try(PrintWriter output = new PrintWriter(file)){ String s=""; for(int i = 0; i < 100; i++){ s+=(int)(Math.random()*100)+" "; } output.print(s); } try (Scanner input = new Scanner(file)){ String[] string = new String[100]; int[] array = new int[100]; for(int i = 0; i < 100; i++) { string[i] = input.next(); System.out.print(string[i]); System.out.print(" "); } System.out.println(); for(int i = 0; i < 100; i++) { array[i] = Integer.parseInt(string[i]); } Arrays.sort(array); for(int i = 0; i < 100; i++) { System.out.print(array[i]); System.out.print(" "); } } } } }

+ main(args: String[]) : void - writeToFile(file: File) : void - readFromFile(file: File) : void 关系： - File 其中，符号解释如下： - 类名：表示类的名称，一般使用大写字母开头的驼峰式命名法。 - 属性...

import java.util.Arrays; import java.util.Random; import java.util.Scanner; public class Main { public static void main(String[] args) { Scanner scanner = new Scanner(System.in); int[] arr = new int[6]; for (int i = 0; i < arr.length; i++) { System.out.print("请输入第" + (i + 1) + "个元素："); arr[i] = scanner.nextInt(); } System.out.println("数组中的元素为：" + Arrays.toString(arr)); int max = arr[0]; for (int i = 1; i < arr.length; i++) { if (arr[i] > max) { max = arr[i]; } } System.out.println("最大值为：" + max); Random random = new Random(); for (int i = arr.length; i > 1; i--) { int j = random.nextInt(i); int temp = arr[j]; arr[j] = arr[i - 1]; arr[i - 1] = temp; } System.out.println("随机排列后的数组为：" +Arrays.toString(arr)); } }

5. 如果编译成功，将会在同一目录下生成一个名为“Main.class”的字节码文件。 6. 输入以下命令来运行程序： java Main 7. 您将看到程序在控制台窗口中的输出。根据程序中的提示输入数字，程序将会计算...

解读以下代码import java.util.Arrays; import java.util.Scanner; public class ex4 { public static void main(String[] args){ //获取数据 Scanner sc =new Scanner(System.in); System.out.println("请输入长和宽"); System.out.print("长："); int m = sc.nextInt(); System.out.print("宽："); int n = sc.nextInt(); //算法部分 int[] cur = new int[n]; Arrays.fill(cur,1); for (int i = 1;i < m;i++){ for(int j = 1;j < n;j++){ cur[j] += cur[j-1]; } } //输出结构 System.out.println("共有"+cur[n-1]+"种走法"); } }

1. 通过 Scanner 类获取输入，即方格的长和宽。 2. 初始化一个长度为 n 的一维数组 cur，用来存储当前到每个位置的路径数目，并将其全部初始化为 1。因为对于第一行和第一列的任意一个方格，它们只有一条路径可以...

import java.util.Arrays; import java.util.Scanner; public class Main { public static void main(String[] args) { Scanner sc = new Scanner(System.in); Integer[] nums = Arrays.stream(sc.nextLine().split(",")).map(Integer::parseInt).toArray(Integer[]::new); int bag = Integer.parseInt(sc.nextLine()); System.out.println(getResult(nums, bag)); } private static int getResult(Integer[] nums, int bag) { int n = nums.length; int[] dp = new int[bag + 1]; dp[0] = 1; for (int i = 1; i <= n; i++) { int num = nums[i - 1]; for (int j = bag; j >= num; j--) { dp[j] = dp[j] + dp[j - num]; } } return dp[bag]; } }翻译成C++

以下是将提供的 Java 代码翻译成 C++ 的版本： cpp #include #include #include using namespace std; int getResult(vector<int>& nums, int bag) { int n = nums.size(); vector<int> dp(bag + 1, 0); ...

import java.util.ArrayList; import java.util.Arrays; import java.util.Scanner; public class 1322 { public static void main(String[] args) { Scanner sc = new Scanner(System.in); int n = sc.nextInt(); String str = sc.next(); char []chars=str.toCharArray(); char []result=spy(n,chars); System.out.println(result); } public static char[] spy(int n,char[] chars){ int len=chars.length; ArrayList<Integer>[] ch = new ArrayList[128]; for (int i = 0; i < 128; i++) { ch[i] = new ArrayList<Integer>(); } for (int i = 0; i < chars.length; i++) { ch[chars[i]].add(i); } int[]next=new int[len]; int count=0; for (int i = 0; i < 128; i++) { for (int num : ch[i]) { next[count++]=num; } } char[] result=new char[len]; int index=n-1; for (int i = 0; i < len; i++) { result[i] = chars[index=next[index]]; } return result; } }解释这段代码并说出他的计算复杂度

这段代码实现了一种加密算法，输入一个整数n和一个字符串str，输出将str按照一定规则加密后的结果。具体实现是将字符串中的每个字符按照ASCII码值存储在一个ArrayList数组中，然后按照存储顺序重新排列，最后按照...

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Java语法：Scanner用法

JAVA实验项目.docx

import java.io.*; import java.util.Arrays; import java.util.Scanner; public class FileTest { public static void main(String[] args) throws IOException { // 接收给定的一行字符串 Scanner scanner = new Scanner(System.in); String line = scanner.nextLine();

package step1; /** * @author pengzheng */ import java.util.Arrays; // 导入数组工具类 Arrays import java.util.Scanner; public class TestIntArray { public static void main(String[] args) { … for (int e : a) { // 使用增强型for循环遍历数组 System.out.print(e + " "); } } }

将这个代码补充完整package step1; /** * @author pengzheng */ [代码] // 导入数组工具类 Arrays import java.util.Scanner; public class TestIntArray { public static void main(String[] args) { … } } }

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