使用 Maven、Gradle 等进行

依赖管理,依赖配置文件为pom.xml或者build.gradle

使用 pip 进行依赖管理，通过requirements.txt文件管理依赖，

使用pip install命令安装依赖

java">public class Main {public static void main(String[] args) {printNumbers(1, 2, 3, 4, 5);}// 带有可变参数的函数public static void printNumbers(int... numbers) {System.out.println("Printing numbers:");for (int number : numbers) {System.out.println(number);}}
}

# 可变参数函数示例
def print_numbers(*args):print("Printing numbers:")for number in args:print(number)# 调用可变参数函数
print_numbers(1, 2, 3, 4, 5)

package mainimport "fmt"// 可变参数函数示例
func printNumbers(numbers ...int) {fmt.Println("Printing numbers:")for _, number := range numbers {fmt.Println(number)}
}func main() {// 调用可变参数函数printNumbers(1, 2, 3, 4, 5)
}

java">try {// 可能抛出异常的代码int result = 10 / 0; // 会抛出 ArithmeticException 异常
} catch (ArithmeticException e) {// 捕获异常并处理System.out.println("发生了算术异常：" + e.getMessage());
} finally {// 可选的 finally 语句块System.out.println("这里是 finally 语句块");
}

try:# 可能抛出异常的代码result = 10 / 0  # 会抛出 ZeroDivisionError 异常
except ZeroDivisionError as e:# 捕获异常并处理print("发生了除零异常：", e)
finally:# 可选的 finally 语句块print("这里是 finally 语句块")

import ("errors""fmt"
)func main() {defer func() {if r := recover(); r != nil {// 捕获错误并处理fmt.Println("发生了错误：", r)}}()// 可能发生错误的代码err := someFunction() // 会返回一个错误if err != nil {// 处理错误panic(err)}
}func someFunction() error {// 可能返回错误的逻辑return errors.New("这是一个错误")
}

java">// for 循环
for (int i = 0; i < 5; i++) {System.out.println(i);
}// foreach 循环
List<String> list = new ArrayList<>();
list.add("A");
list.add("B");
for (String item : list) {System.out.println(item);
}// while 循环
int i = 0;
while (i < 5) {System.out.println(i);i++;
}

# for 循环
for i in range(5):print(i)# foreach 循环
list = ["A", "B"]
for item in list:print(item)# while 循环
i = 0
while i < 5:print(i)i += 1

// for 循环
for i := 0; i < 5; i++ {fmt.Println(i)
}// foreach 循环
list := []string{"A", "B"}
for _, item := range list {fmt.Println(item)
}// while 循环
i := 0
for i < 5 {fmt.Println(i)i++
}

java">import java.util.ArrayList;
import java.util.List;public class Main {public static void main(String[] args) {// 创建一个 ArrayListList<Integer> list = new ArrayList<>();// 添加元素到列表list.add(1);list.add(2);list.add(3);// 打印列表内容System.out.println("Java List:");for (int i : list) {System.out.println(i);}}
}

# 创建一个列表
list = [1, 2, 3]
# 打印列表内容
print("Python List:")
for i in list:print(i)

package mainimport "fmt"func main() {// 创建一个切片list := []int{1, 2, 3}// 打印切片内容fmt.Println("Go List:")for _, value := range list {fmt.Println(value)}
}

java">import java.util.HashSet;
import java.util.Set;public class Main {public static void main(String[] args) {// 创建一个 HashSetSet<Integer> set = new HashSet<>();// 添加元素到集合set.add(1);set.add(2);set.add(3);// 打印集合内容System.out.println("Java Set:");for (int i : set) {System.out.println(i);}}
}

# 创建一个集合
set = {1, 2, 3}
# 打印集合内容
print("Python Set:")
for i in set:print(i)

package mainimport "fmt"func main() {// 创建一个模拟 set 的 mapset := make(map[int]struct{})// 添加元素到集合set[1] = struct{}{}set[2] = struct{}{}set[3] = struct{}{}// 打印集合内容fmt.Println("Go Set:")for key := range set {fmt.Println(key)}
}

java">import com.fasterxml.jackson.databind.ObjectMapper;public class Main {public static void main(String[] args) throws Exception {ObjectMapper mapper = new ObjectMapper();// 将对象转换为 JSON 字符串String json = mapper.writeValueAsString(new Person("John", 30));System.out.println(json);// 将 JSON 字符串转换为对象Person person = mapper.readValue(json, Person.class);System.out.println(person.getName()); // 输出 JohnSystem.out.println(person.getAge()); // 输出 30}static class Person {private String name;private int age;public Person() {}public Person(String name, int age) {this.name = name;this.age = age;}public String getName() {return name;}public void setName(String name) {this.name = name;}public int getAge() {return age;}public void setAge(int age) {this.age = age;}}
}

import json# 将字典转换为 JSON 字符串
data = {'name': 'John', 'age': 30}
json_str = json.dumps(data)
print(json_str)  # 输出 {"name": "John", "age": 30}# 将 JSON 字符串转换为字典
data = json.loads(json_str)
print(data['name'])  # 输出 John
print(data['age'])   # 输出 30

import ("encoding/json""fmt"
)func main() {// 将结构体转换为 JSON 字符串type Person struct {Name string `json:"name"`Age  int    `json:"age"`}person := Person{Name: "John", Age: 30}jsonBytes, _ := json.Marshal(person)jsonStr := string(jsonBytes)fmt.Println(jsonStr) // 输出 {"name":"John","age":30}// 将 JSON 字符串转换为结构体var newPerson Personjson.Unmarshal(jsonBytes, &newPerson)fmt.Println(newPerson.Name) // 输出 Johnfmt.Println(newPerson.Age)  // 输出 30
}

java">import org.w3c.dom.*;
import javax.xml.parsers.*;
import java.io.*;public class Main {public static void main(String[] args) throws Exception {// 读取 XML 文件File file = new File("example.xml");DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();DocumentBuilder db = dbf.newDocumentBuilder();Document doc = db.parse(file);// 解析 XMLNodeList nodeList = doc.getElementsByTagName("book");for (int i = 0; i < nodeList.getLength(); i++) {Node node = nodeList.item(i);if (node.getNodeType() == Node.ELEMENT_NODE) {Element element = (Element) node;String title = element.getElementsByTagName("title").item(0).getTextContent();String author = element.getElementsByTagName("author").item(0).getTextContent();System.out.println("Book: " + title + " by " + author);}}}
}

import xml.etree.ElementTree as ET# 读取 XML 文件
tree = ET.parse('example.xml')
root = tree.getroot()# 解析 XML
for book in root.findall('book'):title = book.find('title').textauthor = book.find('author').textprint("Book: {} by {}".format(title, author))

package mainimport ("encoding/xml""fmt""os"
)// 定义 XML 结构体
type Book struct {Title  string `xml:"title"`Author string `xml:"author"`
}func main() {// 读取 XML 文件file, _ := os.Open("example.xml")defer file.Close()// 解码 XMLvar books []Bookxml.NewDecoder(file).Decode(&books)// 打印结果for _, book := range books {fmt.Printf("Book: %s by %s\n", book.Title, book.Author)}
}