在python中运行java代码-带有输入/输出

import subprocess

java_code = '''
public class HelloWorld {
    public static void main(String[] args) {
        System.out.println("Hello, World!");
    }
}
'''

# 将Java代码保存到一个文件中
with open('HelloWorld.java', 'w') as file:
    file.write(java_code)

# 编译Java代码
subprocess.run(['javac', 'HelloWorld.java'])

# 运行Java代码
result = subprocess.run(['java', 'HelloWorld'], capture_output=True, text=True)

# 输出结果
print(result.stdout)

pip install pyjnius

from jnius import autoclass

# 加载Java类
HelloWorld = autoclass('HelloWorld')

# 创建Java对象
hello = HelloWorld()

# 调用Java方法
hello.sayHello()

import java.util.Scanner;

public class InputOutputExample {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        System.out.print("请输入一个数字：");
        int num = scanner.nextInt();
        System.out.println("您输入的数字是：" + num);
    }
}

import subprocess

java_code = '''
import java.util.Scanner;

public class InputOutputExample {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        System.out.print("请输入一个数字：");
        int num = scanner.nextInt();
        System.out.println("您输入的数字是：" + num);
    }
}
'''

# 将Java代码保存到一个文件中
with open('InputOutputExample.java', 'w') as file:
    file.write(java_code)

# 编译Java代码
subprocess.run(['javac', 'InputOutputExample.java'])

# 运行Java代码，并重定向标准输入和标准输出
result = subprocess.run(['java', 'InputOutputExample'], input='123\n', capture_output=True, text=True)

# 输出结果
print(result.stdout)