Sort Stack Using Another Stack

package org.wesome.dsalgo;

import java.util.Stack;

public class SortStack {
    public static Stack<Integer> sortStack(Stack<Integer> unsortedStack) {
        System.out.println("unsorted stack is = " + unsortedStack);
        Stack<Integer> sortedStack = new Stack<>();
//        we will return sortedStack so loop while unsortedStack is not empty.
        while (!unsortedStack.isEmpty()) {
//        pop out the first element from main stack
            int unsortedStackTop = unsortedStack.pop();
            System.out.println("removing unsortedStackTop is = " + unsortedStackTop + " unsortedStackTop is = " + unsortedStack);
//        if temporary stack has data and unsortedStack top is greater than sortedStack top
            while (!sortedStack.isEmpty() && sortedStack.peek() > unsortedStackTop) {
//        pop from temporary stack and push it to the unsortedStack stack
                System.out.println("sortedStackTop = " + sortedStack.peek() + " greater then unsortedStackTop = " + unsortedStackTop);
                System.out.println("so take all the elements of sortedStack which are greater then " + unsortedStackTop + " and put in unSortedStack, then put " + unsortedStackTop + " at the top of sortedStack");
                System.out.println("removing sortedStack top = " + sortedStack.peek() + " and putting back into unsortedStack");
                unsortedStack.push(sortedStack.pop());
                System.out.println("now unsortedStack is = " + unsortedStack);
            }
            System.out.println("pushing unsortedStackTop top = " + unsortedStackTop + " into sortedStack");
            sortedStack.push(unsortedStackTop);
            System.out.println("now sortedStack is = " + sortedStack);
            System.out.println("now unsortedStack is = " + unsortedStack + "\n");
        }
        System.out.print("sortedStack is = " + sortedStack);
        return sortedStack;
    }
}

package org.wesome.dsalgo;

import org.junit.jupiter.api.Assertions;
import org.junit.jupiter.api.Test;

import java.util.Stack;

import static org.wesome.dsalgo.SortStack.sortStack;

public class SortStackTest {
    @Test
    void SortStack() {
        Stack<Integer> stack = new Stack<>();
        stack.add(5);
        stack.add(3);
        stack.add(4);
        stack.add(2);
        stack.add(0);
        stack.add(1);
        Stack<Integer> sortedStack = sortStack(stack);
        Stack<Integer> assertStack = new Stack<>();
        assertStack.add(0);
        assertStack.add(1);
        assertStack.add(2);
        assertStack.add(3);
        assertStack.add(4);
        assertStack.add(5);
        Assertions.assertEquals(assertStack, sortedStack);
    }
}

plugins {
    id 'org.springframework.boot' version '2.5.4'
    id 'io.spring.dependency-management' version '1.0.11.RELEASE'
    id 'java'
}

group = 'org.wesome'
version = '0.0.1-SNAPSHOT'
sourceCompatibility = JavaVersion.VERSION_1_8

configurations {
    compileOnly {
        extendsFrom annotationProcessor
    }
}

repositories {
    mavenCentral()
}

dependencies {
    compileOnly 'org.projectlombok:lombok'
    annotationProcessor 'org.projectlombok:lombok'
    testImplementation 'org.springframework.boot:spring-boot-starter-test'
}

test {
    useJUnitPlatform()
}