java定义方法，通过方法重载比较5.2，6.3，3，5，2.1，0.05，50的大小

以下是Java定义的方法，通过方法重载比较5.2，6.3，3，5，2.1，0.05，50的大小：

public class Example {
    public static void main(String[] args) {
        double a = 5.2;
        double b = 6.3;
        int c = 3;
        int d = 5;
        double e = 2.1;
        double f = 0.05;
        int g = 50;

        System.out.println("Max of " + a + " and " + b + " is " + max(a, b));
        System.out.println("Max of " + c + " and " + d + " is " + max(c, d));
        System.out.println("Max of " + e + " and " + f + " is " + max(e, f));
        System.out.println("Max of " + g + " and " + a + " is " + max(g, a));
    }

    public static double max(double a, double b) {
        return a > b ? a : b;
    }

    public static int max(int a, int b) {
        return a > b ? a : b;
    }

    public static double max(double a, double b, double c) {
        return max(max(a, b), c);
    }

    public static int max(int a, int b, int c) {
        return max(max(a, b), c);
    }
}

输出结果为：

Max of 5.2 and 6.3 is 6.3
Max of 3 and 5 is 5
Max of 2.1 and 0.05 is 2.1
Max of 50 and 5.2 is 50.0

因此，50最大。