我可以在Java中重载变量吗？

public class OverloadingExample {
    public static void main(String[] args) {
        System.out.println(add(1, 2));
        System.out.println(add(1, 2, 3));
    }

    public static int add(int a, int b) {
        return a + b;
    }

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

public class VariableOverloadingExample {
    public static void main(String[] args) {
        int a = 1;
        System.out.println("a = " + a);

        {
            int a = 2;
            System.out.println("a = " + a);
        }

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

a = 1
a = 2
a = 1