java biginteger compare, equals

Main.java

import java.util.*;
import java.math.*;

public class Main {
    public static void main(String args[]) {
        Scanner sc = new Scanner(System.in);
        BigInteger a = sc.nextBigInteger();
        BigInteger b = sc.nextBigInteger();
        int c = a.compareTo(b);
        if (c < 0) {
            System.out.println("<");
        } else if (c == 0) {
            System.out.println("==");
        } else {
            System.out.println(">");
        }
        System.out.println("compareTo = "+c);
        boolean e = a.equals(b);
        if (e) {
            System.out.println("==");
        } else {
            System.out.println("!=");
        }
        System.out.println("equals = "+e);
    }
}