把这段C++代码转换成Java代码

把这段C++代码转换成Java代码:

#include <iostream>
using namespace std;

int main() {
    int a = 5;
    float b = 3.5;
    double c = 2.3456;
    char d = 'A';

    cout << "a = " << a << endl;
    cout << "b = " << b << endl;
    cout << "c = " << c << endl;
    cout << "d = " << d << endl;

    return 0;
}

Java代码:

public class Main {
    public static void main(String[] args) {
        int a = 5;
        float b = 3.5f;
        double c = 2.3456;
        char d = 'A';

        System.out.println("a = " + a);
        System.out.println("b = " + b);
        System.out.println("c = " + c);
        System.out.println("d = " + d);
    }
}

注意，在Java中，float类型的变量需要在数字后面加上f或F，否则会被认为是double类型。此外，Java中的控制台输出使用System.out.println()函数。